Component Tests and General Diagnostics

PCM INSPECTION [L3]

Without Using 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
MTX
*2
TYPE A
*3
TYPE B

Inspection Using An Oscilloscope (Reference)

Cooling fan control signal





PCM terminals
- 1R (+)-body ground (-)

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

Vehicle condition
- Idle after warm up

Purge control signal





PCM terminals
- 2C (+)-body ground (-)

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

Vehicle condition
- Idle after warm up

APP sensor signal

Accelerator pedal is released





Accelerator pedal is depressed






PCM terminals
- 1AO (+)-body ground (-)

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

Vehicle condition
- Ignition switch is turned to the ON position. (engine off)

OCV signal





PCM terminals
- 2E (+)-body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 0.8 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

CMP signal





PCM terminals
- 2S (+)-body ground (-)

Oscilloscope setting
- 1 V/DIV (Y), 25 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

CKP signal





PCM terminals
- 2W (+)-body ground (-)

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

Vehicle condition
- Idle after warm up

Generator field coil control signal





PCM terminals
- 2AA (+)-body ground (-)

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

Vehicle condition
- Idle after warm up (engine speed approx. 650 rpm, no load, A/C off)

Generator output voltage signal





PCM terminals
- 2AF (+)-body ground (-)

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

Vehicle condition
- Idle after warm up

IGT1, IGT2, IGT3, IGT4 signals





PCM terminals
- IGT1 (No.1): 2G (+)-body ground (-)
- IGT2 (No.2): 2K (+)-body ground (-)
- IGT3 (No.3): 2L (+)-body ground (-)
- IGT4 (No.4): 2H (+)-body ground (-)

Oscilloscope setting
- 4 V/DIV (Y), 0.01 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Fuel injection signal





PCM terminals
- Fuel Injection No.1: 2BB (+)-body ground (-)
- Fuel Injection No.2: 2BC (+)-body ground (-)
- Fuel Injection No.3: 2BD (+)-body ground (-)
- Fuel Injection No.4: 2AZ (+)-body ground (-)

Oscilloscope setting
- 4V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

A/F sensor heater control signal





PCM terminals
- 2A (+)-body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 200 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up (engine speed approx. 650 rpm, no load, A/C off)

HO2S heater control signal





PCM terminals
- 2B (+)-body ground (-)

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

Vehicle condition
- Idle after warm up (engine speed approx. 650 rpm, no load, A/C off)

Using SST (M-MDS)

NOTE:
- PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.

- CMP sensor Testing and Inspection
- Main relay Testing and Inspection

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 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, FAN_DUTY, FP, FUELPW1, GENVDSD, HTR11, HTR12, IMRC, IMTV, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, test, VT DUTY1 Wt

PID/Data Monitor Table (Part 1):

PID/Data Monitor Table (Part 2):

PID/Data Monitor Table (Part 3):

PID/Data Monitor Table (Part 4):

PID/Data Monitor Table (Part 5):

PID/Data Monitor Table (Part 6):

PID/Data Monitor Table (Part 7):

PID/Data Monitor Table (Part 8):

PID/Data Monitor Table (Part 9):

*1
The voltage may vary excessively depending on the weather or battery conditions.
*2
MTX
*3
California emission regulation applicable model
*4
TYPE A
*5
TYPE B