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