Self-Diagnostic Function
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Self-Diagnostic Function
WITH CONSULT-III
1. Go to operation check after asking the customer for symptom information. ICC System Running Test.
2. Stop vehicle, turn ignition switch OFF, then connect CONSULT-III to data link connector.
3. With engine started, select "ICC", "Self Diagnostic Result" on CONSULT-III screen in this order.
4. "DTC RESULTS" and "TIME" are indicated on "SELF-DIAG RESULTS". "TIME" is used as a reference data of diagnosis. It shows when malfunction is detected.
NOTE:
"TIME" shows the following.
- 0: malfunction is detected at present (from malfunction detection to ignition switch OFF).
CAN communication (U1000, U1010)
- 1 - 39: Displays when it is normal at present and finds malfunction in the past. It increases like
0 to 1 to 2...38 to 39 after returning to the normal condition whenever IGN OFF to ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0 when malfunction is detected again in the process.
Other than CAN communication (other than U1000, U1010)
- 1 - 49: Displays when it is normal at present and finds malfunction in the past. It increases like
0 to 1 to 2...48 to 49 after returning to the normal condition whenever IGN OFF to ON. If it is over 49, it is fixed to 49 until the self-diagnostic results are erased. It returns to 0 when malfunction is detected again in the process.
If "NO DTC..." is shown, check ICC system warning lamp. If any malfunction is indicated, GO TO step 5.
5. According to Cruise Control System, perform appropriate check, and repair or replace malfunctioning part as necessary.
6. Turn ignition switch OFF.
7. Start engine and select "ICC", "Self Diagnostic Result" and "ERASE" on CONSULT-III display in turn to erase the memory.
CAUTION:
If the memory does not erase, go to 5.
8. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system warning lamp does not illuminate.
WITHOUT CONSULT-III
1. Go to operation check after asking the customer for symptom information. ICC System Running Test.
2. Stop the vehicle and turn ignition switch OFF.
3. Start engine.
4. Wait 5 seconds after starting engine, then within 10 seconds, push up RESUME/ACCELERATE switch 5 times, and push down SET/COAST switch 5 times.
CAUTION:
- Never turn the MAIN switch ON.
- When operation above is not completed within the specified period, go back to procedure 1 and do all over again.
- If self-diagnosis mode cannot be started after several attempts, the ICC sensor integrated unit may have had malfunction. Repair or replace it. Refer to "SELF-DIAGNOSIS BY DOT MATRIX LCD WILL NOT RUN".
5. When self-diagnosis mode is started, DTC are shown on set vehicle speed indicator.
CAUTION:
- DTC will disappear after 5 minutes.
- When more than one malfunction is detected, a maximum of 3 code numbers can be stored; the latest malfunction will be displayed first.
6. Check Cruise Control System, and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC sensor integrated unit.
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system warning lamp (Orange) does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn ignition switch OFF.
2. Start engine and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and
DISTANCE switch 5 times in this order.
CAUTION:
- Press them within 10 seconds after pressing CANCEL switch at first.
- When operation is not completed within 10 seconds, start again from step 2 above.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system
ON), and make sure that ICC system warning lamp (Orange) does not illuminate.
SELF-DIAGNOSIS BY DOT MATRIX LCD WILL NOT RUN
Possible Irregular Condition
1.CHECK FUSE
Check if the fuse is blown.
OK or NG
OK - GO TO 2.
NG - If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK ICC SYSTEM DISPLAY
Check if dot matrix LCD in the combination meter illuminates. Self-Diagnosis Mode of Combination Meter.
OK or NG
OK - GO TO 3.
NG - Check combination meter. Trouble Diagnosis.
3.CHECK POWER SUPPLY CIRCUIT FOR ICC SENSOR INTEGRATED UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC sensor integrated unit connector.
3. Turn ignition switch ON.
4. Check voltage between ICC sensor integrated unit harness connector and ground.
OK or NG
OK - GO TO 4.
NG - Repair or replace ICC sensor integrated unit power supply harness.
4.CHECK GROUND CIRCUIT FOR ICC SENSOR INTEGRATED UNIT
1. Turn ignition switch OFF.
2. Check continuity between ICC sensor integrated unit harness connector and ground.
OK or NG
OK - GO TO 5.
NG - Repair or replace ICC sensor integrated unit ground harness.
5.CHECK CONNECTOR FOR ICC SENSOR INTEGRATED UNIT
1. Check terminals for bend and looseness.
2. Securely connect ICC sensor integrated unit connector again.
3. Perform self-diagnosis without CONSULT-III.
Can self-diagnosis be performed?
YES - Check connector. (Check connector housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair applicable part.)
NO - GO TO 6.
6.CHECK ICC STEERING SWITCH
Check ICC steering switch. ICC Steering Switch.
OK or NG
OK - GO TO 7.
NG - Replace ICC steering switch.
7.CHECK HARNESS BETWEEN ECM AND ICC STEERING SWITCH
1. Turn ignition switch OFF.
2. Disconnect ECM connector.
3. Check resistance between ECM harness connector.
4. Check continuity between ECM harness connector and ground.
OK or NG
OK - GO TO 8.
NG - Repair or replace harness between ECM and ICC steering switch.
8.CHECK CONNECTOR FOR ECM
1. Check terminals for bend and looseness.
2. Securely connect ECM connector again.
3. Perform self-diagnosis without CONSULT-III.
Can self-diagnosis be performed?
YES - Check connector. (Check connector housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair applicable part.)
NO - GO TO 9.
9.CHECK CAN COMMUNICATION
1. Perform self-diagnosis with CONSULT-III.
2. Check if DTC " CAN COMM CIRCUIT" is indicated in self-diagnosis item in the display.
Is it indicated?
YES - 1. CAN communication inspection. ICC.
2. After repairing or replacing applicable item, erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NO - 1. Perform "ENGINE" self-diagnosis. EC (for VQ35HR) or (for VK45DE).
2. After repairing or replacing applicable item, erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.