DTC P205B:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

id0102k1722300

DTC P205B:00

UREA tank temperature sensor circuit range/performance
DETECTION CONDITION
•  With the following conditions met, the difference between the urea temperature sensor and the temperature of urea quality sensor is higher than 19.96 °C {67.93 °F} or the difference between the urea temperature sensor and the temperature of urea quality sensor is lower than –20.04 °C {-4.072 °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
•  Maximum difference between modeled exhaust gas temperature sensor No.5, ambient temperature and ECT sensor No.1: 14.96 °C {58.93 °F} or less
•  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: 10.9—16 V
Note
•  DTC P2BAF:00 is also stored in the PCM and the vehicle speed is restricted.
•  DTC P1640:00 is also stored in the PCM.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the dosing control unit detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for same malfunction has been stored in the dosing control unit.
•  PENDING CODE is available if the dosing control unit detects the above malfunction condition first driving cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the dosing control unit memory.
FAIL-SAFE FUNCTION
•  Restricts the maximum remaining distance to empty.
•  Limits the upper limit of the engine speed.
POSSIBLE CAUSE
•  Urea level sensor/urea temperature sensor/urea tank heater connector or terminals malfunction
•  Dosing control unit connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
•  Short to power supply circuit in wiring harness between the following terminals:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
•  Open circuit in wiring harness between the following terminals:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
•  CAN communication line malfunction
•  Urea quality sensor malfunction
•  Urea temperature sensor malfunction
•  Dosing control unit malfunction

Diagnostic Procedure

STEP

INSPECTION

RESULTS

ACTION
1
RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the snapshot data on the repair order.
—
Go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the PENDING CODE/ DTC present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
Perform applicable DTC troubleshooting, and then perform compulsory diesel particulate filter regeneration.
No
Go to the next step.
4
INSPECT UREA LEVEL SENSOR/UREA TEMPERATURE SENSOR/UREA TANK HEATER CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the urea level sensor/urea temperature sensor/urea tank heater connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
5
INSPECT DOSING CONTROL UNIT CONNECTOR CONDITION
•  Disconnect the dosing control unit connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 11.
No
Go to the next step.
6
INSPECT UREA TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND
•  Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
•  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
•  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 11.
No
Go to the next step.
7
INSPECT UREA TEMPERATURE SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected.
•  Switch the ignition ON (engine off).
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
•  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
•  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 11.
8
INSPECT UREA TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition off.
•  Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
―  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
―  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  Urea level sensor/urea temperature sensor/urea tank heater terminal C—dosing control unit terminal L
•  Urea level sensor/urea temperature sensor/urea tank heater terminal A—dosing control unit terminal AR
•  Urea level sensor/urea temperature sensor/urea tank heater terminal B—dosing control unit terminal AV
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a open circuit.
Go to Step 11.
9
INSPECT UREA QUALITY SENSOR
•  Inspect the Urea quality sensor.
•  Is there any malfunction?
Yes
Replace the Urea quality sensor, go to step 11.
(See UREA QUALITY SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
10
INSPECT UREA TEMPERATURE SENSOR
•  Inspect the urea temperature sensor.
•  Is there any malfunction?
Yes
Replace the urea level sensor/urea temperature sensor/urea tank heater, then go to the next step.
(See UREA TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
11
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the dosing control unit memory using the M-MDS.
•  Leave the vehicle for 6 h.
•  Leave for 2 min while idling.
•  Retrieve the dosing control unit DTCs using the M-MDS.
•  Is the same Pending DTC present?
Yes
Replace the urea level sensor/urea temperature sensor/urea tank heater, then go to the next step.
•  If the malfunction recurs, replace the dosing control unit.
Go to the next step.
No
Go to the next step.
12
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
No
DTC troubleshooting completed.