PCM INSPECTION [MZR 1.6]

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Without Using the M-MDS

Note

•  Because the PCM uses a waterproof connector, the inspection for the voltage/wave pattern cannot be performed. The following values are for reference.

PCM terminal voltage table (Reference)

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Inspection Using An Oscilloscope (Reference)

APP sensor (No.2) signal

Accelerator pedal released

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Accelerator pedal depressed

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PCM terminals

•  1AG (+)—body ground (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm up

Fuel injection control signal

am2zzw00001204

PCM terminals

•  Fuel injector No.1: 2Z (+)—Negative battery terminal (–)

•  Fuel injector No.2: 2U (+)—Negative battery terminal (–)

•  Fuel injector No.3: 2P (+)—Negative battery terminal (–)

•  Fuel injector No.4: 2K (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

CMP signal

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PCM terminals

•  2AC (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Evaporative purge control signal

am2zzw00003588

PCM terminals

•  2AE (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Variable valve timing control signal

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PCM terminals

•  2BE (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

A/F sensor heater control signal

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PCM terminals

•  2BD (+)—Negative battery terminal (–)

Oscilloscope setting

•  5 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up (no load condition)

CKP signal

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PCM terminals

•  2AH(+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Generator output voltage signal

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PCM terminals

•  2M (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

Generator field coil control signal

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PCM terminals

•  2AS (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  Idle after warm-up

ESA control signal

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PCM terminals (except for California emission regulation applicable model)

•  Ignition coil No.1: 2AF (+)—Negative battery terminal (–)

•  Ignition coil No.2: 2AA (+)—Negative battery terminal (–)

•  Ignition coil No.3: 2V (+)—Negative battery terminal (–)

•  Ignition coil No.4: 2Q (+)—Negative battery terminal (–)

Oscilloscope setting

•  0.5 V/DIV (Y), 40 ms/DIV (X), DC range

Vehicle condition

•  Idle after warm-up

Throttle control (–) signal

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PCM terminals

•  2F (+)—Negative battery terminal (–)

Oscilloscope setting

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

Vehicle condition

•  When the accelerator pedal changes from fully depressed to fully released while the ignition switch is ON (engine off)

Throttle control (+) signal

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PCM terminals

•  2B (+)—Negative battery terminal (–)

Oscilloscope setting

•  5 V/DIV (Y), 0.4 ms/DIV (X), DC range

Vehicle condition

•  Switch the ignition ON (engine off).

Using The M-MDS

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 [MZR 1.6].)

―  Main relay (See RELAY INSPECTION.)

1.  Connect the M-MDS to the DLC-2.

2.  Switch the ignition ON (engine off).

3.  Measure the PID value.

•  If PID value is not within the specification, follow the instructions in 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.

―  ACCS, ALTF, ARPMDES, EVAPCP, FAN1, FAN3, FP, IMRC, INJ_1, INJ_2, INJ_3, INJ_4, LPS, SSA/SS1, SSB/SS2, SSC/SS3, SSD/SS4, SSE_SS5, Test, VT Duty1 wt