Component Tests and General Diagnostics

PCM INSPECTION [LF]

Not Using the M-MDS

NOTE:
- The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.

Terminal Voltage Table (Part 1):

Terminal Voltage Table (Part 2):

Terminal Voltage Table (Part 3):

Terminal Voltage Table (Part 4):

Terminal Voltage Table (Part 5):

Terminal Voltage Table (Part 6):

Terminal Voltage Table (Part 7):

*1
AT
*2
MT
*3
With cruise control system

Inspection Using An Oscilloscope (Reference)

Throttle control (+) signal

PCM terminals
- 2A (+)-Negative battery terminal (-)

Oscilloscope setting
- 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle (Accelerator pedal released)

Throttle control (-) signal

PCM terminals
- 2B (+)-Negative battery terminal (-)

Oscilloscope setting
- 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle (Accelerator pedal released)

Purge control signal

PCM terminals
- 2C (+)-Negative battery terminal (-)

Oscilloscope setting
- 2 V/DIV (Y), 0.1 s/DIV (X), DC range

Vehicle condition
- Idle after warm-up

OCV control signal

PCM terminals
- 2E (+)-Negative battery terminal (-)

Oscilloscope setting
- 2.5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

CMP signal

PCM terminals
- 2S (+)-Negative battery terminal (-)

Oscilloscope setting
- 2 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

CKP signal

PCM terminals
- 2W (+)-Negative battery terminal (-)

Oscilloscope setting
- 2 V/DIV (Y), 10 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Generator field coil control signal

PCM terminals
- 2AI (+)-Negative battery terminal (-)

Oscilloscope setting
- 0.5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Generator output voltage signal

PCM terminals
- 2AJ (+)-Negative battery terminal (-)

Oscilloscope setting
- 2 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Ignition timing signals

PCM terminals
- IGT1 (No.1): 2BA (+)-Negative battery terminal (-)
- IGT2 (No.2): 2AW (+)-Negative battery terminal (-)
- IGT3 (No.3): 2AX (+)-Negative battery terminal (-)
- IGT4 (No.4): 2AT (+)-Negative battery terminal (-)

Oscilloscope setting
- 2 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up

Fuel injection signals

PCM terminals
- Fuel Injection No.1: 2BB (+)-Negative battery terminal (-)
- Fuel Injection No.2: 2BC (+)-Negative battery terminal (-)
- Fuel Injection No.3: 2BD (+)-Negative battery terminal (-)
- Fuel Injection No.4: 2AZ (+)-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

PCM terminals
- 2BG (+)-Negative battery terminal (-)

Oscilloscope setting
- 5 V/DIV (Y), 50 ms/DIV (X), DC range

Vehicle condition
- Idle after warm-up (no load)

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
- Main relay

1. Connect the SST(M-MDS) to the DLC-2.

2. Turn the ignition switch to ON position.

3. Measure the PID value.

- If PID value is not within the specification, follow the instructions in "Inspection item (s)" 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.
- For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM terminal voltage.
- The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.

- ACCS, ALTF, ARPMDES, EVAPCP, FAN1, FAN2, FAN3, FP, FUELPW1, GENVDSD, HTR11, HTR12, IMTV, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, test, VT DUTY1 Wt
PID/DATA monitor table (reference)