ON-BOARD DIAGNOSTIC SYSTEM [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

id0102k1078000

Outline

Function

―  A malfunction detection function, which detects overall malfunctions in the forward SCR system-related parts.

―  A memory function, which stores detected DTCs.

―  A display function, which indicates malfunction locations and status via DTC output.

―  A PID/data monitoring function, which reads out specific input/output signals and verifies the input/output condition.

Malfunction detection function

DTC table

•  The DTCs are shown below.

Note

•  When each warning/indicator light turns on/flashes, a message may be displayed in the multi-information display or the center display. (with multi-information display or center display).

DTC No.	Check engine light	Master warning indication/master warning light	Charging system warning indication/charging system warning light	Engine oil warning indication/engine oil warning light	Engine oil level warning indication/Engine oil level warning light	Wrench warning indication	Diesel particulate filter indication/Diesel particulate filter indicator light	Glow Indicator Light	Selective catalytic reduction (SCR) warning light	Condition	Fail-safe function	Drive cycle	Monitor item	Self test type*1	Memory function
P0137:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 (oxygen concentration) circuit low input	—	1	NOx sensor No.1	C	×
P0138:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 (oxygen concentration) circuit high input	—	1	NOx sensor No.1	C	×
P2002:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	PM sensor efficiency below threshold	—	2	PM sensor	C	×
P202E:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	Urea injector circuit range/performance problem	×	1 or 2	CCM	C	×
P203A:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor circuit problem	—	1	CCM	C	×
P203B:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor malfunction	×	1	CCM	C	×
P203C:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor circuit low input	×	1	CCM	C, O	×
P203D:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor circuit high input	×	1	CCM	C, O	×
P203E:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor malfunction	—	2	CCM	C	×
P2047:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea injector control circuit problem	×	1	CCM	C	×
P2048:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea injector circuit low input	×	1	CCM	C, O	×
P2049:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea injector circuit high input	×	1	CCM	C	×
P204F:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump performance problem problem	×	1	CCM	C	×
P205A:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea temperature sensor circuit problem	×	1	CCM	C	×
P205B:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank temperature sensor circuit range/performance	×	1	CCM	C	×
P208A:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump control circuit malfunction	×	1	CCM	C	×
P208B:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	Urea pump (pumping side) range/performance problem	×	1 or 2	CCM	C	×
P208C:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump control circuit low input	×	1	CCM	C	×
P208D:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump control circuit high input	×	1	CCM	C	×
P20B9:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank heater control circuit malfunction	×	1	CCM	C	×
P20BB:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank heater circuit low input	×	1	CCM	C	×
P20BC:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank heater control circuit high input	×	1	CCM	C	×
P20BD:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea hose heater circuit problem	×	1	CCM	C, O	×
P20BF:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea hose heater control circuit low input	×	1	CCM	C	×
P20C0:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea hose heater circuit high input	×	1	CCM	C, O	×
P20E8:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump pressure too low	×	1	SCR converter	C	×
P20E9:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump pressure too high	×	1	SCR converter	C	×
P20EA:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	SCR relay No.1 malfunction	—	1	CCM	C	×
P20EB:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	SCR relay No.1 malfunction (stuck closed)	—	1	CCM	C	×
P20EE:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	SCR converter efficiency below threshold	×	1	CCM	C	×
P20FA:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Open circuit in urea pump circuit	×	1	CCM	C, O	×
P20FB:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump (siphoning side) range/performance problem	—	2	CCM	C	×
P20FC:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump circuit low input	×	1	CCM	C	×
P20FD:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea pump circuit high input	×	1	CCM	C	×
P20FF:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Dosing control unit malfunction	—	1	CCM	C	×
P214F:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank heater control malfunction	×	1	CCM	C	×
P21C5:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea level sensor: Detection performance malfunction	×	2	CCM	C	×
P21CB:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Dosing control unit power supply voltage low input	—	1	CCM	C	×
P21CC:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Dosing control unit power supply voltage high input	—	1	CCM	C	×
P21DD:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea tank heater control malfunction	×	1	CCM	C	×
P2200:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 control circuit range/performance problem	×	1	NOx sensor No.1	C	×
P2201:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	NOx sensor No.1 system: Nox concentration malfunction	—	2	Nox sensor No.1	C	×
P2202:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 (NOx oxygen concentration) circuit low input	×	1	NOx sensor No.1	C	×
P2203:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 (NOx oxygen concentration) circuit high input	×	1	NOx sensor No.1	C	×
P2204:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Continuous monitoring of NOx sensor No.1 signal validity	×	1	NOx sensor No.1	C	×
P2205:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1 heater control circuit range/performance problem	×	1	NOx sensor No.1	C	×
P220A:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.1: power supply voltage malfunction	×	1	NOx sensor No.1	C	×
P220B:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.2: power supply voltage malfunction	×	1	NOx sensor No.2	C	×
P220E:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	NOx Sensor No.1 heater: performance problem	×	1	Nox sensor No.1	C	×
P220F:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	NOx Sensor No.2 heater: performance problem	—	2	Nox sensor No.2	C	×
P221C:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea hose heater control circuit low input	×	1	CCM	C	×
P221D:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	Urea hose heater circuit high input	×	1	CCM	C	×
P2270:00	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor (oxygen concentration): lean	×	2	NOx sensor	C	×
P2274:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor (oxygen concentration): lean	×	2	NOx sensor	C	×
P229E:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.2 control circuit range/performance problem	×	1	NOx sensor No.2	C	×
P229F:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	NOx sensor No.2 system: Nox concentration malfunction	—	2	Nox sensor No.2	C	×
P22A0:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor circuit low input	—	1	NOx sensor No.2	C	×
P22A1:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.2 circuit high input	×	1	NOx sensor No.2	C	×
P22A2:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	Continuous monitoring of NOx sensor No.2 signal validity	×	2	Nox sensor No.2	C	×
P22A3:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	NOx sensor No.2 heater control circuit range/performance problem	×	1	NOx sensor No.2	C	×
P24AE:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor control circuit range/performance problem	—	1*2, 2*3	PM sensor	C	×
P24AF:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	PM sensor circuit range/performance	—	2	PM sensor	C	×
P24B1:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor circuit high input	—	1*2, 2*3	PM sensor	C	×
P24B3:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor: internal heater circuit current low input	—	1	PM sensor	C	×
P24B6:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor: internal heater circuit current high input	—	1	PM sensor	C	×
P24B7:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	PM sensor heater resistance malfunction	—	2	PM sensor	C	×
P24C6:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor: internal temperature sensor malfunction	—	1	CCM	C	×
P24C7:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	PM sensor temperature circuit range/performance	—	2	PM sensor	C	×
P24D0:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	PM sensor: internal supply voltage malfunction	—	1	PM sensor	C	×
P24DA:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	ON	PM sensor system: Protection tube error	—	2	PM sensor	C	×
U0073:00	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	CAN system communication error (HS CAN)	×	1	other	C, O	×
U0100:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	CAN communication: communication error to PCM	×	1	CCM	C, O	×
U029D:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	CAN communication system: NOx sensor No.1 information communication error with dosing control unit	×	1	CCM	C, O	×
U029E:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	CAN communication system: NOx sensor No.2 information communication error with dosing control unit	×	1	CCM	C, O	×
U02A2:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	SENT communication system: urea quality sensor information communication error with dosing control unit	×	1	CCM	C, O	×
U02A3:00	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF	OFF	CAN communication system: PM sensor information communication error with dosing control unit	—	1	CCM	C, O	×

Status byte for DTC

•  The two digits (two digits after hyphen (-)) after the 7-digit DTC.

ac5wzn00004012

•  A code which indicates the pending code, current/past malfunction status, or warning illumination status.

•  Can be read by performing a CMDTC self-test using the Mazda Modular Diagnostic System (M-MDS).

•  For details on the status byte, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.

Detection condition for the applicable DTC

DTC No.	Condition	Detection condition
P0137:00	NOx sensor No.1 (oxygen concentration) circuit low input	•  The oxygen concentration output by NOx sensor No.1 is less than the specified value for a continuous 0.5 s.
P0138:00	NOx sensor No.1 (oxygen concentration) circuit high input	•  The oxygen concentration output by NOx sensor No.1 exceeds the specification for a continuous 0.5 s.
P2002:00	PM sensor efficiency below threshold	•  The internal circuit voltage or current of the PM sensor is not within the threshold value.
P202E:00	Urea injector circuit range/performance problem	•  If any of the following conditions is met under condition A or condition B: 2 s in the control circuit of the urea injector. Condition A: •  When the following condition is met, the dosing control unit detects the urea injector circuit current 0.2 A or less for 1 min: MONITORING CONDITIONS ―  Switch the ignition ON ―  Battery voltage: 10.9—16 V ―  Urea injector heater control is operating ―  The following conditions are met: •  Urea injector: P2047:00, P2048:00, P2049:00 Condition B: •  When the following condition is met, the dosing control unit detects the urea injector coil temperature than more 33.5 °C {92.3 °F} for 0.1 s: MONITORING CONDITIONS ―  Less than 8 s after ignition is switched ON (engine off) ―  Urea injector heater control is operating ―  Battery voltage: 10.9—16 V ―  Ambient air temperature: -10.04 °C {13.93 °F} or more ―  Before starting the engine, leave the vehicle with the engine turned off for 6 hours or more. ―  Difference between maximum and minimum value of ambient temperature: 15 °C {59 °F} or less ―  Difference between maximum and minimum value of Exhaust gas temperature sensor No.5: 15 °C {59 °F} or less ―  Difference between maximum and minimum value of ECT sensor No.1: 15 °C {59 °F} or less ―  The following conditions are met: •  Urea injector: P2047:00, P2048:00, P2049:00
P203A:00	Urea level sensor circuit problem	•  When any of the following conditions is met: ―  The dosing control unit detected a remaining AdBlue® amount of less than 0% (value output by urea level sensor: Less than 15 mm {0.59 in}) 3 times continuously. ―  The dosing control unit detected a remaining AdBlue® amount exceeding 100% (value output by urea level sensor: Exceeding 400 mm {15.7 in}) 3 times continuously.
P203B:00	Urea level sensor malfunction	•  With all of the following conditions met, the signal cycle sent from the urea level sensor to the dosing control unit is not within the specified range for a continuous 4 s. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Battery voltage: 10.9—16 V
P203C:00	Urea level sensor circuit low input	•  The dosing control unit detects that the output duty signal circuit voltage of the urea level sensor is more than 1.18 V for 2 s. MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V
P203D:00	Urea level sensor circuit high input	•  The dosing control unit detects that the output duty signal circuit voltage of the urea level sensor exceeds 2.05 V for 2 s. MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V
P203E:00	Urea level sensor malfunction	•  With all of the following conditions met, the dosing control unit receives a reception signal from the urea level sensor only less than 3 times while the vehicle is being driven 5 km {3 mile} or more. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea tank level: more than 9.8% ―  Acceleration: 2 m/sec2{7 ft/s} ―  AdBlue® temperature: more than 4.96 °C {40.9 °F} ―  Battery voltage: 10.9—16 V ―  The following DTCs are not detected: •  P203B:00, P203C:00, P203D:00
P2047:00	Urea injector control circuit problem	•  With the following conditions met, the difference between the high pressure side and the low pressure side of the urea injector voltage is more than 1 V for a continuous 2 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Battery voltage: 8—6 V
P2048:00	Urea injector circuit low input	•  The dosing control unit detects the following conditions for 2 s in the control circuit of the urea injector. ―  Wiring harness between urea injector terminal B and dosing control unit terminal N: Current value exceeds 1.6 A ―  Wiring harness between urea injector terminal A and dosing control unit terminal K: Current value is less than 0.2 A MONITORING CONDITIONS ―  Ignition switched ON ―  Urea injector is activated. ―  Dosing control unit initialization is not performed ―  Battery voltage: 10.9—16 V
P2049:00	Urea injector circuit high input	•  The dosing control unit detects the following conditions for 2 s in the control circuit of the urea injector. ―  Wiring harness between urea injector terminal B and dosing control unit terminal N: Current value is less than 0.2 A ―  Wiring harness between urea injector terminal A and dosing control unit terminal K: Current value exceeds 1.6 A MONITORING CONDITIONS ―  Ignition switched ON ―  Urea injector is activated. ―  Dosing control unit initialization is not performed ―  Battery voltage: 10.9—16 V
P204F:00	Urea pump performance problem problem	•  With the following conditions met, the urea pump pressure does not increase for a continuous 0.2 s or more. MONITORING CONDITIONS •  Engine speed: 300 rpm or more •  Exhaust gas temperature sensor No.5: 169.96 °C {337.93 °F} or more •  Urea pump pressure: less than 620 kPa {6.32 kgf/cm2, 89.9 psi} •  The following DTCs are not detected: ―  Urea injector: P202E:00 ―  Urea pump: P20E8:00, P20E9:00 •  Ignition switched ON (engine on) •  Battery voltage: 10 V or more
P205A:00	Urea temperature sensor circuit problem	•  If any of the following conditions is met under condition A or condition B: Condition A: •  The dosing control unit detects that the AdBlue® temperature in the urea tank is less than −40 °C {−40 °F} three times continuously. MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V Condition B: •  The dosing control unit detects that the AdBlue® temperature in the urea tank exceeds 80 °C {176 °F} three times continuously. MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V
P205B:00	Urea tank temperature sensor circuit range/performance	•  With the following conditions met, the difference between the urea temperature sensor and the engine oil temperature sensor is higher than 19.56 °C {67.21 °F} or the difference between the urea temperature sensor and the engine oil temperature is lower than –29.3 °C {–20.8 °F} for a continuous 4 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Period vehicle being left: 6 h or more •  Exhaust gas temperature sensor No.5: 169.96 °C {337.93 °F} or more •  ECT sensor No.1: 14.96 °C {58.93 °F} or more •  Ambient air temperature: 14.96 °C {58.93 °F} or more •  AdBlue® amount: 23.5 % •  The following DTCs are not detected: ―  Urea level sensor: P203A:00, P203B:00, P203C:00, P203D:00 ―  Urea temperature sensor: P205A:00 •  Battery voltage: 10 V or more
P208A:00	Urea pump control circuit malfunction	•  With the following conditions met, the urea pump output voltage is between 2.6 V and 3.4 V for a continuous 2 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Battery voltage: 10—16 V
P208B:00	Urea pump (pumping side) range/performance problem	•  When the following conditions are met, the dosing control unit detects the urea pump (pumping side) is not normally operating: Condition A: •  With the following conditions met, the number of armature operation malfunction detections in the urea pump exceeds the specified value for a continuous 2.5 s. MONITORING CONDITIONS ―  SCR control is operating ―  Barometric pressure: 72.2—117 kPa {0.736—1.19 kgf/cm2, 10.5—17.0 psi} ―  Battery voltage: 9—16 V ―  SCR system control presshure: 0—3,200 kPa {0—32.63 kgf/cm2, 0—464.1 psi} ―  Urea pump estimated coil temperature: -7.04—149.96 °C{19.3—301.93 °F} or more ―  Urea temperature sensor: Normal ―  Armature operation in urea pump is normal ―  The following DTCs are not detected: •  Urea pump: P208A:00, P208C:00, P208D:00 •  Urea temperature sensor/urea level sensor: P203B:00, P203C:00, P203D:00, P205A:00, P205B:00 Condition B: •  With the following conditions met, the urea pump pressure calculation value is 140 kPa {1.43 kgf/cm2, 20.3psi} higher or more than the barometric pressure for a continuous 0.1 s. MONITORING CONDITIONS ―  Period of time urea pump (siphoning side) flow passage is open: 0.2 s ―  Trapped air amount in urea hose: 5800 mm3{5.8 mi} ―  Soak time: 6 h or more ―  Urea hose heater is not operating ―  Urea tank heater is not operating ―  Urea pump estimated coil temperature: -10.04—89.96 °C {13.93—193.9 °F} or more ―  Number of times plunger in urea pump operates: 4—5 times ―  The following DTCs are not detected: ―  The following conditions are met: •  Urea pump: P208A:00, P208C:00, P208D:00 Condition C: •  With all of the following conditions met, the deviation of the AdBlue® current calculated by the dosing control unit based on the urea pump control current and urea temperature sensor is 14 % or more for a continuous 5.1 s. MONITORING CONDITIONS ―  Within 30 s after ignition is switched ON (engine off or on) ―  Elapsed time from initial calculation of urea pump temperature: Within 20 s ―  Soak time: 6 h or more ―  Exhaust gas temperature sensor No.5: 15°C {59 °F} or less ―  Ambient air temperature: -10.0 °C {14 °F} or more ―  The following DTCs are not detected: •  Urea pump: P208A:00, P208C:00, P208D:00
P208C:00	Urea pump control circuit low input	•  With the following conditions met, the urea pump output voltage is between 1.6 V and 2.4 V or the urea pump supply voltage is between 0 V and 0.35 V for a continuous 2 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Battery voltage: 8—16 V
P208D:00	Urea pump control circuit high input	•  With the following conditions met, the urea pump output current is between 1.5 A and 3.0 A or the urea pump supply voltage is between 1.65 V and 1.94 V for a continuous 1 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Battery voltage: 8—16 V
P20B9:00	Urea tank heater control circuit malfunction	•  With the following conditions met, the voltage at the urea tank heater is between 1.1 V and 1.31 V for a continuous 2 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Urea tank heater is not operated. •  Battery voltage: 8—16 V
P20BB:00	Urea tank heater circuit low input	•  If any of the following conditions is met under condition A or condition B: Condition A: •  The dosing control unit detects that the voltage of the urea tank heater control circuit is 0—0.35 V for 2 s. MONITORING CONDITIONS ―  Ignition switched ON ―  Urea tank heater is activated. ―  Battery voltage: 10.9—16 V Condition B: •  The dosing control unit detects that the voltage of the urea tank heater control circuit is exceeds 3.29 V for 2 s. MONITORING CONDITIONS ―  Ignition switched ON ―  Urea tank heater is activated. ―  Battery voltage: 10.9—16 V
P20BC:00	Urea tank heater control circuit high input	•  With the following conditions met, the voltage at the urea tank heater is between 1.1 V and 1.31 V for a continuous 2 s. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  Urea tank heater is not operated. •  Battery voltage: 8—16 V
P20BD:00	Urea hose heater circuit problem	•  With all of the following conditions met, the urea hose heater voltage is not within 1.1 to 1.31 V for a continuous 2 s. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea hose Heater commanded: OFF ―  Battery voltage: 10.9—16 V
P20BF:00	Urea hose heater control circuit low input	•  If any of the following conditions is met under condition A or condition B: Condition A: •  If the dosing control unit detects that the urea hose heater control circuit voltage is above 0 V and 0.35 V or less for 2 s, the dosing control unit determines that the urea hose heater control circuit has a malfunction. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea hose heater is activated. ―  Battery voltage: 10.9—16 V Condition B: •  If the dosing control unit detects that the urea hose heater control circuit voltage is more than 1.46 V for 2 s, the dosing control unit determines that the urea hose heater control circuit has a malfunction. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea hose heater is activated. ―  Battery voltage: 10.9—16 V
P20C0:00	Urea hose heater circuit high input	•  With all of the following conditions met, the urea hose heater voltage is not within 1.65 to 1.94 V for a continuous 2 s. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Battery voltage: 10.9—16 V
P20E8:00	Urea pump pressure too low	•  The dosing control unit detects that the pressure of the urea pump control circuit is less than specified value.
P20E9:00	Urea pump pressure too high	•  The dosing control unit detects that the pressure of the urea pump control circuit is more than specified value.
P20EA:00	SCR relay No.1 malfunction	•  With the following conditions met, the dosing control unit detects that there is no SCR relay No.1 open signal 3 times or more. MONITORING CONDITIONS •  Ignition switched ON (engine on)
P20EB:00	SCR relay No.1 malfunction (stuck closed)	•  With the following conditions met, the dosing control unit detects that SCR relay No.1 is stuck. MONITORING CONDITIONS •  Ignition switched ON (engine off or on)
P20EE:00	SCR converter efficiency below threshold	•  The reduction rate of the NOx value detected by the NOx sensor is under 25 % less than the threshold of the reduction rate of the NOx value calculated by the dosing control unit.
P20FA:00	Open circuit in urea pump circuit	•  The dosing control unit detects an open circuit for 2 s in the control circuit of the urea pump. ―  Output voltage from urea pump control circuit to dosing control unit: 2.6—3.4 V MONITORING CONDITIONS ―  Ignition switched ON ―  Dosing control unit initialization is not performed ―  Battery voltage: 10.9—16 V
P20FB:00	Urea pump (siphoning side) range/performance problem	•  With any of the following conditions met, the dosing control unit determines that the urea pump (siphoning side) is not operating normally. ―  After 4.5 s or more have elapsed since the urea pump has operated, the pump siphons 5 times or more. ―  Urea pump pressure: 50.0 kPa {0.510 kgf/cm2, 7.25 psi} or more MONITORING CONDITIONS •  Urea pump (siphoning side) pressure: 450 kPa {4.59 kgf/cm2, 65.3 psi} or more •  The engine is not running. •  Battery voltage: 10.9—16 V •  The following DTCs are not detected: ―  Urea injector: P2047:00 ―  Urea pump: P208A:00, P208B:00, P208C:00, P208D:00, P20FA:00, P20FC:00, P20FD:00
P20FC:00	Urea pump circuit low input	•  If any of the following conditions is met under condition A or condition B: Condition A: •  The dosing control unit detects low input for 2 s in the control circuit of the urea pump. ―  Output voltage from urea pump control circuit to dosing control unit: 1.6—2.4 V MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V Condition B: •  The dosing control unit detects low input for 1 s in the control circuit of the urea pump. ―  Supply voltage from dosing control unit to urea pump control circuit: 0—0.35 V MONITORING CONDITIONS ―  Ignition switched ON ―  Battery voltage: 10.9—16 V
P20FD:00	Urea pump circuit high input	•  If any of the following conditions is met under condition A or condition B: Condition A: •  The dosing control unit detects high input for 2 s in the control circuit of the urea pump. ―  Output current value from urea pump control circuit to dosing control unit: 1.5—3 A MONITORING CONDITIONS ―  Ignition switched off ―  Urea pump is activated. ―  Battery voltage: 10.9—16 V Condition B: •  The dosing control unit detects high input for 1 s in the control circuit of the urea pump. ―  Supply voltage from dosing control unit to urea pump control circuit: 1.65—1.94 V MONITORING CONDITIONS ―  Ignition switched off ―  Urea pump is activated. ―  Battery voltage: 10.9—16 V
P20FF:00	Dosing control unit malfunction	•  With the following conditions met, there is a malfunction inside the dosing control unit (read/write error, communication error, internal supply voltage malfunction). MONITORING CONDITIONS •  Ignition switched ON (engine off or on)
P214F:00	Urea tank heater control malfunction	•  With the following conditions met, the coil conductivity in the urea tank heater is the specified value or more. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  The operation time of the urea tank heater is 50 s or more, or the coil conductivity in the urea tank heater is lower than the value 50 times or more. •  Battery voltage: 8—16 V for a continuous 2 s •  Ignition switched ON (engine off): 5 min or more have elapsed •  The following DTCs are not detected: ―  Urea temperature sensor: P205A:00 ―  Urea tank heater: P20B9:00, P20BB:00, P20BC:00
P21C5:00	Urea level sensor: Detection performance malfunction	•  The dosing control unit detects that the change in the diesel exhaust fluid amount in the urea tank is the specified value or more 4 times.
P21CB:00	Dosing control unit power supply voltage low input	•  If the dosing control unit detects that the power supply voltage is less than 8 V for 10 s, the dosing control unit determines that the power supply voltage circuit has a malfunction. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on)
P21CC:00	Dosing control unit power supply voltage high input	•  If the dosing control unit detects that the power supply voltage is more than 16 V for 10 s, the dosing control unit determines that the power supply voltage circuit has a malfunction. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on)
P21DD:00	Urea tank heater control malfunction	•  With the following conditions met, the coil conductivity in the urea tank heater is the specified value or less. MONITORING CONDITIONS •  Ignition switched ON (engine off or on) •  The operation time of the urea tank heater is 50 s or more, or the coil conductivity in the urea tank heater is lower than the value 50 times or more. •  Battery voltage: 11—16 V for a continuous 2 s •  Ignition switched ON (engine off): 5 min or more have elapsed •  The following DTCs are not detected: ―  Urea temperature sensor: P205A:00 ―  Urea tank heater: P20B9:00, P20BB:00, P20BC:00
P2200:00	NOx sensor No.1 control circuit range/performance problem	•  Any one of the following conditions is met: ―  Signal for open circuit in circuit from NOx sensor No.1 is received for a continuous 4 s ―  Signal for short circuit in circuit from NOx sensor No.1 is received for a continuous 4 s
P2201:00	NOx sensor No.1 system: NOx concentration malfunction	•  With the following conditions met, the value of the NOx sensor No.1 on-board diagnostic result is not within the specified value.
P2202:00	NOx sensor No.1 (NOx oxygen concentration) circuit low input	•  The NOx concentration output by NOx sensor No.1 is less than -100 ppm for a continuous 8.0 s.
P2203:00	NOx sensor No.1 (NOx oxygen concentration) circuit high input	•  The NOx concentration output by NOx sensor No.1 exceeds 2,900 ppm for a continuous 8.0 s.
P2204:00	Continuous monitoring of NOx sensor No.1 signal validity	•  The dosing control unit detects two times that the speed of the signal received from NOx sensor No.1 is slower than the target vehicle speed.
P2205:00	NOx sensor No.1 heater control circuit range/performance problem	•  Any one of the following conditions is met: ―  Signal for open circuit in internal heater circuit from NOx sensor No.1 is received for a continuous 4 s ―  Signal for short circuit in internal heater circuit from NOx sensor No.1 is received for a continuous 4 s
P220A:00	NOx sensor No.1: power supply voltage malfunction	•  The NOx sensor No.1 internal supply voltage is not within the specified value for a continuous 30 s.
P220B:00	NOx sensor No.2: power supply voltage malfunction	•  The NOx sensor No.2 internal supply voltage is not within the specified value for a continuous 30 s.
P220E:00	NOx Sensor No.1 heater: performance problem	•  The heater built-into NOx sensor No.1 is not activating normally for a continuous 80 s or more.
P220F:00	NOx Sensor No.2 heater: performance problem	•  The heater built-into NOx sensor No.2 is not activating normally for a continuous 80 s or more.
P221C:00	Urea hose heater control circuit low input	•  The dosing control unit detects that the urea hose heater resistance is specified value or less. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea hose heater is activated for a continuous 50 s. ―  Battery voltage: 8—16 V ―  The following DTCs are not detected: •  Urea hose heater: P20BD:00, P20BF:00, P20C0:00
P221D:00	Urea hose heater circuit high input	•  The dosing control unit detects that the urea hose heater resistance is specified value or more. MONITORING CONDITIONS ―  Ignition switched ON (engine off or on) ―  Urea hose heater is activated for a continuous 50 s. ―  Battery voltage: 10.9—16.0 V ―  The following DTCs are not detected: •  Urea hose heater: P20BD:00, P20BF:00, P20C0:00
P2270:00	NOx sensor No.2: power supply voltage malfunction	•  The oxygen concentration output by NOx sensor is higher than the specified value for a continuous 7 s.
P2274:00	NOx sensor No.2 control circuit range/performance problem	•  The oxygen concentration output by NOx sensor No.2 is higher than the specified value for a continuous 7 s.
P229E:00	NOx sensor No.2 control circuit range/performance problem	•  Any one of the following conditions is met: ―  Signal for open circuit in circuit from NOx sensor No.2 is received for a continuous 4 s ―  Signal for short circuit in circuit from NOx sensor No.2 is received for a continuous 4 s
P229F:00	NOx sensor No.2 system: NOx concentration malfunction	•  With the following conditions met, the value of the NOx sensor No.2 on-board diagnostic result is not within the specified value.
P22A0:00	NOx sensor No.2 circuit low input	•  Any one of the following conditions is met: ―  The NOx concentration output by NOx sensor No.2 is less than -100 labda for a continuous 8.0 s. ―  The oxygen concentration output by NOx sensor No.2 is less than -0.099 labda for a continuous 0.5 s.
P22A1:00	NOx sensor No.2 circuit high input	•  When any of the following conditions is met: ―  The NOx concentration output by NOx sensor No.2 is more than 2,900 ppm for a continuous 8 s. ―  The oxygen concentration output by NOx sensor No.2 is more than 0.29 labda for a continuous 0.5 s.
P22A2:00	Continuous monitoring of NOx sensor No.2 signal validity	•  The dosing control unit detects two times that the speed of the signal received from NOx sensor No.2 is slower than the target vehicle speed.
P22A3:00	NOx sensor No.2 heater control circuit range/performance problem	•  Any one of the following conditions is met: ―  Signal for open circuit in internal heater circuit from NOx sensor No.2 is received for a continuous 4 s ―  Signal for short circuit in internal heater circuit from NOx sensor No.2 is received for a continuous 4 s
P24AE:00	PM sensor control circuit range/performance problem	•  The internal circuit voltage or current of the PM sensor is not within the threshold value.
P24AF:00	PM sensor circuit range/performance	•  Five s have elapsed since the current in the PM sensor exceeds 5.00 µA.
P24B1:00	PM sensor circuit high input	•  The internal circuit voltage of the PM sensor is more than 4.1 V for a continuous 2 s.
P24B3:00	PM sensor: internal heater circuit current low input	•  If any of the following conditions is met for a continuous 5 s while the PM sensor internal heater is operating. ―  PM sensor internal heater voltage: less than 3 V ―  PM sensor internal heater current: more than 15.0 A or less than 0.50 A
P24B6:00	PM sensor: internal heater circuit current high input	•  If any of the following conditions is met for a continuous 5 s while the PM sensor internal heater is not operating. ―  PM sensor internal heater voltage: more than 7 V ―  PM sensor internal heater current: more than 0.2 A
P24B7:00	PM sensor heater resistance malfunction	•  PM sensor heater temperature is more than 2.93 Ω or less than 1.93 Ω
P24C6:00	PM sensor: internal temperature sensor malfunction	•  When the following condition is met for a continuous 1 s: ―  PM sensor internal temperature sensor voltage: more than 3.0 V ―  PM sensor internal temperature sensor voltage: less than 0.30 V ―  PM sensor internal temperature sensor temperature: more than 920 °C {1688 °F}
P24C7:00	PM sensor temperature circuit range/performance	•  The PM temperature detected by the PM sensor is greatly different from the value estimated by the dosing control unit. •  The PM temperature detected by the PM sensor is –39 °C {–39 °F} or less.
P24D0:00	PM sensor: internal supply voltage malfunction	•  The PM sensor internal supply voltage is not within the specified value.
P24DA:00	PM sensor system: Protection tube error	•  The voltage variance of the heater built into the PM sensor is less than 0.1 V.
U0073:00	CAN system communication error (HS CAN)	•  Malfunction in CAN bus communication line. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched ON (engine off or on)
U0100:00	CAN communication: communication error to PCM	•  Communication error between the PCM and TCM continues for 5 s or more. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched ON (engine off or on)
U029D:00	CAN communication system: NOx sensor No.1 information communication error with dosing control unit	•  With the following conditions met, a communication error between the dosing control unit and NOx sensor No.1 is continued for 5 s or more. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched ON (engine off or on)
U029E:00	CAN communication system: NOx sensor No.2 information communication error with dosing control unit	•  With the following conditions met, a communication error between the dosing control unit and NOx sensor No.2 is continued for 5 s or more. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched ON (engine off or on)
U02A2:00	SENT communication system: urea quality sensor information communication error with dosing control unit	•  With the following conditions met, a communication error between the dosing control unit and is continued for 5 s or more. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched ON
U02A3:00	CAN communication system: PM sensor information communication error with dosing control unit	•  With the following conditions met, a communication error between the dosing control unit and PM sensor is continued for 5 s or more. MONITORING CONDITIONS •  Battery voltage: 10.9—16 V •  Ignition switched: On

Sending continuous monitoring system test results (pending code)

•  These appear when a problem is detected in a monitored system.

1-drive cycle type

•  If any problems are detected in the first drive cycle, pending codes will be stored in the dosing control unit memory, as well as DTCs.

•  After pending codes are stored, if the dosing control unit determines that the system is normal in any future drive cycle, the dosing control unit deletes the pending codes.

2-drive cycle type

•  The code for a failed system is stored in the dosing control unit memory in the first drive cycle. If the dosing control unit determines that the system returned to normal or the problem was mistakenly detected, and deletes the pending code. If the problem is found in the second drive cycle too, the dosing control unit determines that the system has failed, and stores the pending codes, and the DTCs.

•  After pending codes are stored, if the dosing control unit determines that the system is normal in any future drive cycle, the dosing control unit deletes the pending codes.

Snapshot data

•  The snapshot data stores the currently detected DTC data.

•  The recording timing for the freeze frame data/snapshot data differs depending on the number of DTC drive cycles.

―  For a DTC with a drive cycle number 1, only the malfunction determination data is recorded.

―  For a DTC with a drive cycle number 2, both the malfunction determination and undetermined data is recorded.

Snapshot data table

Sending diagnostic data

PID/data monitor function

•  Data related to emission such as input signals, dosing control unit calculation values, output signals, and the system condition can be monitored.

•  The PID/data monitor items are shown below.

Note

•  Depending on the vehicle, some PID/DATA items may not be operable.

PID/DATA monitor item table

On-board device control (Simulation test, active command mode)

Active command modes function

•  Simulation items for output parts have been set.

•  When the engine conditions and the other conditions have been met, the simulation item can be operated.

•  The simulation items are shown below.

Note

•  Simulation items on parts which are not equipped to the vehicle do not operate.

Simulation item table