PCM INSPECTION [MZ-CD 1.6 (Y6)]

id0140b2802500


Not Using the M-MDS

Note
•  The PCM terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the PCM is necessary to determine where the malfunction occurs.
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PCM terminal voltage table (Reference)

Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item(s)
101
Fuel injector No.1 (high)
Fuel injector No.1
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.1
102
Fuel injector No.4 (high)
Fuel injector No.4
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.4
103
Fuel temperature sensor Ground
Fuel temperature sensor
Under any condition
Below 1.0
•  Related wiring harness
•  Fuel temperature sensor
104
Variable boost control signal
Variable boost control solenoid valve
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Variable boost control solenoid valve
105
—
106
—
107
—
108
Starter
Starter relay
Cranking
Below 1.0
•  Related wiring harness
•  Starter relay
109
Fuel injector No.3 (high)
Fuel injector No.3
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.3
110
Fuel injector No.2 (high)
Fuel injector No.2
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.2
111
—
112
—
113
Catalyst exhaust gas temperature sensor No.1 ground
Catalyst exhaust gas temperature sensor No.1
Under any condition
1.0 or less
•  Catalyst exhaust gas temperature sensor
•  Related wiring harness
114
Catalyst exhaust gas temperature sensor No.2 ground
Catalyst exhaust gas temperature sensor No.2
Under any condition
1.0 or less
•  Catalyst exhaust gas temperature sensor
•  Related wiring harness
115
—
116
—
117
Fuel injector No.4 (low)
Fuel injector No.4
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.4
118
Fuel injector No.1 (low)
Fuel injector No.1
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.1
119
Diesel particulate filter differential pressure sensor ground
Diesel particulate filter differential pressure sensor
Under any condition
1.0 or less
•  Related wiring harness
•  Fuel injector No.2
120
—
121
EGR valve position sensor ground
EGR valve
Switch the ignition ON
Below 1.0
•  Diesel particulate filter differential pressure sensor
•  Related wiring harness
122
—
123
Glow plug relay monitor
Glow plug relay
Switch the ignition ON
Approx. 1.3
•  Related wiring harness
•  Glow plug relay
Idle after warm-up
B+
124
MAF
MAF/IAT sensor
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  MAF/IAT sensor
125
Fuel injector No.3 (low)
Fuel injector No.3
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.3
126
Fuel injector No.2 (low)
Fuel injector No.2
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  Fuel injector No.2
127
—
128
—
129
EGR valve position
EGR valve
Idle
Approx. 2.9
•  Related wiring harness
•  EGR valve
Switch the ignition ON
Approx. 0.9
130
—
131
—
132
Throttle valve position sensor signal
Throttle valve position sensor
Switch the ignition ON
Approx. 3.1
•  Throttle valve position sensor
•  Related wiring harness
Idle
Approx. 3.4
201
EGR valve position sensor supply
EGR valve
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  EGR valve
202
Fuel pressure sensor supply
Fuel pressure sensor
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  Fuel pressure sensor
203
Fuel pressure sensor ground
Fuel pressure sensor
Switch the ignition ON
Below 1.0
•  Related wiring harness
•  Fuel pressure sensor
204
MAP sensor ground
MAP sensor
Switch the ignition ON
Below 1.0
•  Related wiring harness
•  MAP sensor
205
MAP sensor supply
MAP sensor
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  MAP sensor
206
CMP sensor supply
CMP sensor
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  CMP sensor
207
Diesel particulate filter differential pressure sensor supply
Diesel particulate filter differential pressure sensor
Switch the ignition ON
Approx. 5.0
•  Diesel particulate filter differential pressure sensor
•  Related wiring harness
208
—
209
—
210
—
211
IAT sensor No.2 ground
IAT sensor No.2
Under any condition
Below 1.0
•  Related wiring harness
•  IAT sensor No.2
212
Fuel metering valve control signal
Fuel metering valve
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Fuel metering valve
•  Related wiring harness
213
—
214
—
215
—
216
—
217
—
218
CKP sensor supply
CKP sensor
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  CKP sensor
219
Fuel pressure
Fuel pressure sensor
Switch the ignition off
Below 1.0
•  Related wiring harness
•  Fuel pressure sensor
Switch the ignition ON
Approx. 5.0
220
Catalyst exhaust gas temperature sensor No.2 signal
Catalyst exhaust gas temperature sensor No.2
Inspect using the M-MDS
•  Catalyst exhaust gas temperature sensor
•  Related wiring harness
221
Catalyst exhaust gas temperature sensor No.1 signal
Catalyst exhaust gas temperature sensor No.1
Inspect using the M-MDS
•  Catalyst exhaust gas temperature sensor
•  Related wiring harness
222
—
223
—
224
—
225
—
226
Oil pressure
Oil pressure switch
Switch the ignition ON
Below 1.0
•  Related wiring harness
•  Oil pressure switch
Idle
B+
227
EGR valve actuator
EGR valve
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  EGR valve
228
EGR valve actuator
EGR valve
Under any condition
Below 1.0
•  Related wiring harness
•  EGR valve
229
MAF sensor ground
MAF sensor
Under any condition
Below 1.0
•  Related wiring harness
•  MAF sensor
230
ECT
ECT sensor
Engine coolant temperature:30°C {86°F}
Approx. 2.6
•  Related wiring harness
•  ECT sensor
Engine coolant temperature:70°C {158°F}
Approx. 1.1
231
IAT
MAF/IAT sensor
Switch the ignition ON
IAT 30 °C {86 °F}
Approx. 2.1
•  Related wiring harness
•  MAF/IAT sensor
IAT 60 °C {140 °F}
Approx. 1.1
232
Fuel temperature
Fuel temperature sensor
Fuel temperature:43°C {109.4°F}
Approx. 1.6
•  Related wiring harness
•  Fuel temperature sensor
Fuel temperature:47°C {116.6°F}
Approx. 1.3
233
—
234
MAP
MAP sensor
Switch the ignition ON
Approx. 2.4
•  Related wiring harness
•  MAP sensor
235
—
236
Power supply
Main relay
Switch the ignition ON
B+
•  Related wiring harness
•  Main relay
237
CMP sensor ground
CMP sensor
Under any condition
Below 1.0
•  Related wiring harness
•  CMP sensor
238
CKP
CKP sensor
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  CKP sensor
239
CKP sensor ground
CKP sensor
Switch the ignition ON
Below 1.0
•  Related wiring harness
•  CKP sensor
240
CMP
CMP sensor
Inspect using the wave Profile. (See Inspection Using An Oscilloscope (Reference).)
•  Related wiring harness
•  CMP sensor
241
Main relay control
Main relay
Switch the ignition ON
Approx. 0.9
•  Related wiring harness
•  Main relay
242
IAT
IAT sensor No.2
Switch the ignition ON
IAT 30 °C {86 °F}
Approx. 3.5
•  Related wiring harness
•  IAT sensor No.2
243
—
244
ECT sensor ground
ECT sensor
Under any condition
Below 1.0
•  Related wiring harness
•  ECT sensor
245
—
246
Diesel particulate filter differential pressure sensor signal
Diesel particulate filter differential pressure sensor
Inspect using the M-MDS
•  Diesel particulate filter differential pressure sensor
•  Related wiring harness
247
Throttle valve actuator control signal
Throttle valve actuator
Switch the ignition ON
Approx. 0.6
•  Throttle valve position sensor
•  Related wiring harness
248
—
301
CAN_H
Controller area network (high)
Because this terminal is for CAN, determination by terminal voltage is not possible.
•  Related wiring harness
302
—
303
—
304
Cooling fan relay No.3
Cooling fan relay No.3
Cooling fan relay No.3 operating
Below 1.0
•  Related wiring harness
•  Cooling fan relay No.3
Cooling fan relay No.3 not operating
B+
305
—
306
Refrigerant pressure sensor ground
Refrigerant pressure sensor
Under any condition
Below 1.0
•  Related wiring harness
•  Refrigerant pressure sensor
307
Ground
Body ground
Under any condition
Below 1.0
•  Related wiring harness
308
Ground
Body ground
Under any condition
Below 1.0
•  Related wiring harness
309
CAN_L
Controller area network (low)
Because this terminal is for CAN, determination by terminal voltage is not possible.
•  Related wiring harness
310
APP
APP sensor
Accelerator pedal released
Approx. 3.3
•  Related wiring harness
•  APP sensor
Accelerator pedal depressed
Approx. 8.0
311
Ignition switch
Ignition switch
Switch the ignition ON
B+
•  Related wiring harness
•  Ignition switch
312
—
313
—
314
—
315
—
316
—
317
Brake
Brake switch
Brake pedal released
Below 1.0
•  Related wiring harness
•  Brake switch
Brake pedal depressed
B+
318
Cooling fan relay No.1
Cooling fan relay No.1
Cooling fan relay No.1 operating
Below 1.0
•  Related wiring harness
•  Cooling fan relay No.1
Cooling fan relay No.1 not operating
B+
319
—
320
Generator
Generator
Under any condition
Below 1.0
•  Related wiring harness
•  Generator
321
—
322
—
323
Refrigerant pressure sensor supply
Refrigerant pressure sensor
Switch the ignition ON
Approx. 5.0
•  Related wiring harness
•  Refrigerant pressure sensor
324
Refrigerant pressure
Refrigerant pressure sensor
Switch the ignition ON
Approx. 1.5
•  Related wiring harness
•  Refrigerant pressure sensor
325
—
326
Glow plug relay
Glow plug relay
Glow plug relay operating
Below 1.0
•  Related wiring harness
•  Glow plug relay
Glow plug relay not operating
B+
327
—
328
—
329
—
330
A/C relay
A/C relay
Idle
Refrigerant pressure switch on
Below 1.0
•  Related wiring harness
•  A/C relay
Refrigerant pressure switch off
B+
331
Power supply
Main relay
Switch the ignition ON
B+
•  Related wiring harness
•  Main relay
332
Ground
Body ground
Under any condition
Below 1.0
•  Related wiring harness


Inspection Using An Oscilloscope (Reference)


Fuel injector (+) signal

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PCM terminals
•  No.1: 101 (+)—Body ground (–)
•  No.2: 110 (+)—Body ground (–)
•  No.3: 109 (+)—Body ground (–)
•  No.4: 102 (+)—Body ground (–)
Oscilloscope setting
•  50 V/DIV (Y), 2 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


Variable boost control signal

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PCM terminals
•  104 (+)—Body ground (–)
Oscilloscope setting
•  5 V/DIV (Y), 2 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


Fuel injector (-) signal

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PCM terminals
•  No.1: 118 (+)—Body ground (–)
•  No.2: 126 (+)—Body ground (–)
•  No.3: 125 (+)—Body ground (–)
•  No.4: 117 (+)—Body ground (–)
Oscilloscope setting
•  50 V/DIV (Y), 2 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


MAF sensor signal

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PCM terminals
•  124 (+)—Body ground (–)
Oscilloscope setting
•  5 V/DIV (Y), 200 us/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


Fuel metering valve signal

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PCM terminals
•  212 (+)—Body ground (–)
Oscilloscope setting
•  5 V/DIV (Y), 5 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


EGR valve actuator signal

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PCM terminals
•  227 (+)—Body ground (–)
Oscilloscope setting
•  5 V/DIV (Y), 400 us/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


CKP sensor signal

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PCM terminals
•  238 (+)—Body ground (–)
Oscilloscope setting
•  5 V/DIV (Y), 2 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


CMP sensor signal

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PCM terminals
•  240 (+)—Body ground (–)
Oscilloscope setting
•  2.5 V/DIV (Y), 20 ms/DIV (X), DC range
Vehicle condition
•  Idle after warm-up


Using the M-MDS

•  PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.
―  CMP sensor (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZ-CD 1.6 (Y6)].)
―  Main relay (See RELAY INSPECTION [MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6)].)

1.  Connect the M-MDS to the DLC-2.

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2.  Turn the ignition switch to the ON position.

3.  Measure the PID value.

•  If the PID value is not within the specification, follow the instructions in the Action column.
Note
•  The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a malfunction of the monitored value for the output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output control.

PID monitor table (reference)

—: Not applicable

Item

(Definition)

Unit/

Condition

Condition/Specification (Reference)

Inspection item(s)
AAT
(Ambient air temperature)
°C
Indicates the ambient air temperature
—
AC_PRES
(A/C pressure sensor)
Pa
Idle
A/C switch ON: Approx. 1.15 MPa
A/C switch OFF: Approx. 807 kPa
•  A/C pressure sensor
V
A/C switch ON: Approx. 1.83 V
A/C switch OFF: Approx.1.43 V
ACCS
(Air conditioning compressor cycling switch)
Off/On
Idle A/C switch ON: On
Idle A/C switch OFF: Off
•  The following PIDs
―  APP1, APP2, ECT, RPM
APP
(Accelerator pedal position)
%
Switch the ignition ON
Accelerator pedal released: 0 %
Accelerator pedal depressed: 100 %
•  APP sensor
APP1
(Accelerator pedal position No.1)
%
Switch the ignition ON
Accelerator pedal released: 7.84 %
Accelerator pedal depressed: 65.88 %
•  APP sensor
APP2
(Accelerator pedal position No.2)
%
Switch the ignition ON
Accelerator pedal released: 7.45 %
Accelerator pedal depressed: 67.05 %
•  APP sensor
BARO
(Barometric pressure)
Pa
Indicates the barometric pressure.
—
BAT
(Boost air temperature sensor)
V
BAT 40 °C {104 °F}: Approx. 2.7 V
BAT 45 °C {113 °F}: Approx. 2.5 V
BAT 60 °C {140 °F}: Approx. 1.8 V
•  IAT sensor No.2
°C
Indicates the intake air temperature.
CATT11_DSD
(Desired catalyst temperature (Catalyst exhaust gas temperature sensor No.1))
°C
Indicates the target/estimated exhaust gas temperature (Catalyst exhaust gas temperature sensor No.1).
•  Catalyst exhaust gas temperature sensor No.1
CATT12_DSD
(Desired catalyst temperature (Catalyst exhaust gas temperature sensor No.2))
°C
Indicates the target/estimated exhaust gas temperature (Catalyst exhaust gas temperature sensor No.2).
•  Catalyst exhaust gas temperature sensor No.2
DPF_SM
(Soot mass In particle filter)
g
Indicates the soot quantity in the diesel particulate filter.
•  Diesel particulate filter differential pressure sensor
DPF_SSM
(Simulated soot mass in particulate filter)
g
Indicates the estimated soot quantity in the diesel particulate filter.
—
DPF_USM
(Uncorrected soot mass of physical model)
g
Indicates the non-correction soot quantity of the theoretical model.
—
ECT
(Engine coolant temperature)
V
ECT 30 °C {86 °F}: Approx. 2.6 V
ECT 50 °C {122 °F}: Approx. 1.7 V
ECT 60 °C {140 °F}: Approx. 1.4 V
ECT 80 °C {176 °F}: Approx. 0.8 V
•  ECT sensor
°C
Indicates the engine coolant temperature.
EGRP
(Exhaust gas recirculation valve position)
V
Idle: Approx. 3.0 V
Switch the ignition ON: Approx. 2.58 V
•  EGR valve
ENG_STAT
(Engine status)
Ready/Running/AFTERRUN
Idle: Running
Switch the ignition ON: Ready
Other: AFTERRUN
—
ETC_DSD
(Electronic throttle control desired)
%
Under any condition: 100 %
•  Throttle position sensor
EXHPRESS_DIF
(Exhaust gas differential pressure)
V
Under any condition: 0.5 V
•  Diesel particulate filter differential pressure sensor
Pa
Indicates the difference in exhaust gas pressure before and after passing the diesel particulate filter.
FAN_DUTY
(Variable fan duty cycle)
%
Elapsed time period after A/C switched ON 100%
Elapsed time period after A/C switched off 0%
•  Fun control module
FLT
(Fuel temperature)
V
FLT 25 °C: Approx. 2.43 V
FLT 38 °C: Approx. 1.74 V
•  Fuel temperature sensor
°C
Indicates the fuel temperature.
FRP
(Fuel rail pressure)
V
Idle: Approx. 0.99 V
Switch the ignition ON: Approx. 0.49 V
•  Fuel pressure sensor
Pa
Idle: Approx. 22 MPa
Switch the ignition ON: Approx. 0 MPa
FUEL_PCV
(Fuel pressure relief control valve)
%
Fuel pressure relief control valve is operated: 13 %
Fuel pressure relief control valve is not operated: 0 %
•  Fuel pressure regulator
FUEL_VCV
(Fuel volume control valve)
%
Idle: Approx. 18.43 %
Switch the ignition ON: Approx. 13.72 %
•  Fuel metering valve
GPC
(Glow plug control)
Off/On
Glow plug relay operating: On
Glow plug relay not operating: Off
•  Glow plug relay
GPC_MON
(Glow plug control relay monitor)
Off/On
Glow plug relay operating: On
Glow plug relay not operating: Off
•  Glow plug relay
IAT
(Intake air temperature)
V
IAT 29 °C {84 °F}: Approx. 2.2 V
IAT 33 °C {91 °F}: Approx. 1.8 V
IAT 44 °C {111 °F}: Approx. 1.5 V
•  IAT sensor
°C
Indicates the intake air temperature.
IMRC
(Intake manifold runner control)
%
This procedure is not for diagnosis
—
LOAD
(Engine load)
%
Idle: Approx. 19 %
Switch the ignition ON: 0 %
—
MAF
(Mass air flow)
g/sec
Idle: 10 g/sec
•  MAF sensor
MAP
(Manifold absolute pressure sensor)
V
MAP 100 kPa: Approx. 2.37 V
•  MAP sensor
Pa
Indicates the manifold absolute pressure.
MIL_DIS
(The distance travelled since the MIL was activated.)
Km
Indicates the travelled distance since the MIL illuminated.
—
OIL_LEVEL
(Engine oil level)
%
Indicates the engine oil level.
—
OIL_TEMP
(Engine oil temperature)
V
OIL_TEMP 61 °C: 1.19 V
OIL_TEMP 34 °C: 0.75 V
—
°C
Indicates the engine oil temperature.
REG_DEM
(Number of demanded regenerations of the particulate filter)
—
Indicates the required reproduction amount of the diesel particulate filter.
—
REG_SUC
(Number of successful regenerations of the particulate filter)
—
Indicates the actual reproduction amount of the diesel particulate filter.
—
RPM
(Engine revolutions per minute)
RPM
Idle: Approx. 750 rpm
•  CKP sensor
SEGRP DSD
(Desired (SEGRP) valve position)
%
Indicates the desired EGR valve position.
•  EGR valve
TOTAL_FUEL
(Total fuel quantity consumed since last filter cleaning)
L
Indicates the total fuel consumption amount after cleaning the filter.
•  Fuel gauge sender unit
VBCV
(Variable boost control solenoid)
%
Idle: Approx. 17.72 %
2,000 rpm: Approx. 70.59 %
Switch the ignition ON: 12.45 %
•  VBC solenoid valve
VBCV_DSD
(Desired variable boost control solenoid)
%
Idle: Approx. 21.0 %
Switch the ignition ON: Approx. 10.98 %
•  VBC solenoid valve
VPWR
(Module supply voltage)
V
Switch the ignition ON: B+
•  Battery
•  Main relay
VSS
(Vehicle speed)
KPH
Indicates the vehicle speed.
•  Wheel-speed sensor