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
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