PCM INSPECTION [MZ-CD 1.6 (Y6)]

Not Using the WDS or Equivalent

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.

PCM terminal voltage table (Reference)

Inspection Using An Oscilloscope (Reference)

Fuel inject control signal (high)

• 101 (+)-Negative battery terminal (-)

• 102 (+)-Negative battery terminal (-)

• 109 (+)-Negative battery terminal (-)

• 110 (+)-Negative battery terminal (-)

• 5 V/DIV (Y), 20 ms/DIV (X), DC range

• Idle after warm-up

Variable boost control signal

• 104 (+)-Negative battery terminal (-)

• 2.5 V/DIV (Y), 1 ms/DIV (X), DC range

• Idle after warm-up

Generator command

• 107 (+)-Negative battery terminal (-)

• 5 mV/DIV (Y), 5 ms/DIV (X), DC range

• Idle after warm-up

Fuel inject control signal (low)

• 117 (+)-Negative battery terminal (-)

• 118 (+)-Negative battery terminal (-)

• 125 (+)-Negative battery terminal (-)

• 126 (+)-Negative battery terminal (-)

• 5 V/DIV (Y), 20 ms/DIV (X), DC range

• Idle after warm-up

Fuel metering valve control signal

• 212 (+)-Negative battery terminal (-)

• 2 V/DIV (Y), 2 ms/DIV (X), DC range

• Idle after warm-up

EGR valve actuator control signal

• 227 (+)-Negative battery terminal (-)

• 2.5 V/DIV (Y), 200 ms/DIV (X), DC range

• Idle after warm-up

CKP sensor signal

• 238 (+)-Negative battery terminal (-)

• 1 V/DIV (Y), 400 ms/DIV (X), DC range

• Idle after warm-up

CMP sensor signal

• 240 (+)-Negative battery terminal (-)

• 1.5 V/DIV (Y), 10 ms/DIV (X), DC range

• Idle after warm-up

Using the WDS or Equivalent (reference)

Note

• 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 1.6 (Y6)].)

1. Connect the WDS or equivalent to the DLC-2.

2. Turn the engine 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.

• The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.

- ALTF, CABVP, EGR_TV, EGRDC, FUN_DUTY, FP, GPC, ST_EN_RLY, VBCV

-: Not applicable

Item (Definition)	Unit/ Condition				Condition/Specification (Reference)	Inspection item(s)	PCM terminal
ABS_MSG (The CAN communication with the ABS HU/CU)	Present/ Not Present				• The CAN communication with the ABS HU/CU is normal: Present • The CAN communication with the ABS HU/CU malfunction: Not Present	• PCM • ABS HUCU • CAN	-
ACCS (A/C compressor cycling switch)	On/Off				• A/C is operating: On • A/C is not operating: Off	• The following PIDs - ECT, RPM, COLP	112
AC_LOWSW (A/C compressor cycling switch)	On/Off				• A/C compressor cycling switch is 290 kPa {2.95 kgf/cm2, 42.0 psi} or more: On • A/C compressor cycling switch is 145-158 kPa {14.8-1.61 kgf/cm2, 21.0-23.0 psi} or less: Off	• A/C compressor cycling switch	303
ALTF (Generator field current control duty signal)	%				• KOEO: Approx. 0-3 % • Idling, E/L is operating: Duty value increases.	• The following PIDs - ECT, IAT, RPM, VSS, ALTT V, VPWR • Generator	107
APP (APP sensor)	%				• Accelerator pedal is released: 0 % • Accelerator pedal is depressed: Approx. 99.6 %	• APP sensor	310
ARPMDES (Target idle speed)	RPM				• Indicates the target idle speed	-	-
BARO (Barometric pressure)	Pa	Bar		psi	• Indicates the atmospheric pressure	• PCM	-
BOO (Brake switch)	On/Off				• Brake pedal is depressed: On • Brake pedal is released: Off	• Brake switch	317
COLP (Refrigerant pressure switch (medium pressure switch))	On/Off				• Refrigerant pressure switch (medium pressure switch) is 1.57-1.77 MPa {16.0-18.0 kgf/cm2, 227-257 psi} or more: On • Refrigerant pressure switch (medium pressure switch) is 1.38 MPa {14.1 kgf/cm2, 200 psi} or less: Off	• Refrigerant pressure switch (medium-pressure switch)	315
DTCCNT (DTC count)	No unit				• Number of DTCs stored • When a DTC is not stored, "0" is indicated	• DTC	-
ECT (ECT sensor)	°C		°F		• Indicates the engine coolant temperature	• ECT sensor	220
EGRDC (EGR valve)	%				• KOEO: 100 % • Idling: Approx. 60-70 %	• EGR valve	228
EGRVP (EGR valve position sensor)	%				• KOEO: 0 % • Idling: Approx. 30-40 %	• EGR valve position sensor	129
EOT (Engine oil temperature sensor)	°C		°F		• Indicates the engine oil temperature	• Engine oil temperature sensor	217
FAN_DUTY (Fan control duty value)	%				• Engine coolant temperature is 80 °C or less: 0 % • Engine coolant temperature is 85 °C: Approx. 20 % • Engine coolant temperature is 90 °C: Approx. 40 %	• Fan control module	318
FP (Fuel pump)	%				• KOEO (Directly after turning the engine switch to the ON position or off): Approx. 35 % • KOEO (After a certain period of time from turning the engine switch to the ON position): Approx. 15 % • Idling: Approx. 35-40 %	• Fuel pump	212
FRP (Fuel pressure sensor)	Pa	Bar		psi	• KOEO: Approx. 430 kPa {4.4 kgf/cm2, 62.4 psi} • Idling: Approx. 22-30 MPa {224.3-305.9 kgf/cm2, 3190.8-4351.1 psi}	• Fuel pressure sensor	219
FRT (Fuel temperature sensor)	°C		°F		• Indicates the fuel temperature	• Fuel temperature sensor	232
GPC (Glow plug relay)	On/Off				• Glow plug relay is operating: On • Glow plug relay is not operating: Off	• Glow plug relay	132
IAT (IAT sensor)	°C		°F		• Indicates the intake air temperature	• IAT sensor	231
IC_MSG (The CAN communication with the instrument cluster)	Present/ Not Present				• The CAN communication with the instrument cluster is normal: Present • The CAN communication with the instrument cluster malfunction: Not Present	• CAN • Instrument cluster • PCM	-
MAF (MAF sensor)	g/s				• KOEO: 0 g/s • KOER (Idling): Approx. 5-6 g/s • KOER (2,000 rpm): Approx. 13-16 g/s	• MAF sensor	243
MAP (MAP sensor)	Pa	Bar		psi	• KOEO/KOER (Idling): Indicates the barometric pressure • KOER (2,000 rpm): Approx. 100-110 kPa {1.02-1.12 kgf/cm2, 14.5-16.0 psi} • KOER (3,000 rpm): Approx. 130-140 kPa {1.33-1.43 kgf/cm2, 18.9-20.3 psi}	• MAP sensor	201
MIL_DIS (Travelled distance since MIL illuminated)	m		mile		• Indicates the travelled distance since the MIL illuminated	-	-
OPSW (Oil pressure switch)	On/Off				• KOEO: On • KOER: Off	• Oil pressure switch	313
RPM (Engine speed)	RPM				• Indicates the engine speed	• CKP sensor	238
ST_EN_RLY (Stater relay)	Enabled/Disabled				• Stater relay is operating: Enabled • Stater relay is not operating: Disabled	• Stater relay	108
TIRESIZE (Tire revolution per mile)	rev/mile				• Indicates the tire revolution per a mile	-	-
TORQUE (Net engine torque)	Nm				• Indicates the net engine torque	-	-
VBCV (VBC solenoid valve)	%				• KOEO: Approx. 5 % • KOER (Idling): Approx. 65-70 % • KOER (2,000 rpm and No load): Approx. 55-60 %	• VBC solenoid valve	245
VPWR (Battery positive voltage)	V				• KOEO: B+ • Idling: B+	• Battery • PCM control relay	307, 308, 332
VSS (Vehicle speed)	KPH		MPH		• Vehicle running: Indicates the vehicle speed	• VSS	214