Component Tests and General Diagnostics

PCM INSPECTION [LF, L5]

Using M-MDS

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

- CMP sensor
- Main relay

1. Connect the M-MDS to the DLC-2.






2. Switch the ignition to ON.

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.
- 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, EVAPCV, FAN_DUTY, FP, IMRC, IMTV, INJ_1~4, SEGRP, TEST, VT Duty1 wt

PID/DATA monitor table (reference)

PID/DATA Monitor Table (Reference) (Part 1):

PID/DATA Monitor Table (Reference) (Part 2):

PID/DATA Monitor Table (Reference) (Part 3):

PID/DATA Monitor Table (Reference) (Part 4):

PID/DATA Monitor Table (Reference) (Part 5):

PID/DATA Monitor Table (Reference) (Part 6):

PID/DATA Monitor Table (Reference) (Part 7):

*1
Calculated value; differs from terminal voltage
*2
MTX
*3
With cruise control switch

- Following PIDs are for the ATX models. If inspects for following PIDs, On-Board Diagnostic System PID/Data Monitor Inspection

Without Using the M-MDS

CAUTION:
- The PCM terminal voltages vary with change in measuring conditions and vehicle conditions. Always carry out a total inspection of the input systems, output systems, and PCM to determine the cause of trouble. Otherwise, a wrong diagnosis will be made.

1. Measure the voltage at each terminal.

- If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s) referring to the Action column in the terminal voltage table.

Terminal voltage table (Reference)

Terminal Voltage Table (Reference) (Part 1):

Terminal Voltage Table (Reference) (Part 2):

Terminal Voltage Table (Reference) (Part 3):

Terminal Voltage Table (Reference) (Part 4):

Terminal Voltage Table (Reference) (Part 5):

Terminal Voltage Table (Reference) (Part 6):

Terminal Voltage Table (Reference) (Part 7):

Terminal Voltage Table (Reference) (Part 8):

*1
With cruise control system
*2
Without advanced keyless entry and push button start system
*3
With advanced keyless entry and push button start system
*4
MTX

Inspection Using An Oscilloscope (Reference)

Cooling fan control





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

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

Vehicle condition
- Idle after warm up

APP sensor No.2 signal

Accelerator pedal released





Accelerator pedal depressed






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

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

Vehicle condition
- Switch the ignition to ON.

Purge control





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

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

Vehicle condition
- Idle after warm up

A/F sensor heater control





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

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

Vehicle condition
- Idle (immediately after starting the engine)

HO2S heater control





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

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

Vehicle condition
- Idle (immediately after starting the engine)

OCV control 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), 5 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

IGT1, IGT2, IGT3, IGT4 control





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

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

Vehicle condition
- Idle after warm up

Generator field coil control





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

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

Vehicle condition
- Idle after warm up

Generator output voltage





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

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

Vehicle condition
- Idle after warm up

Fuel injection (#1, #2, #3, #4) control





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
- 10 V/DIV (Y), 25 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up