Inspection Procedure 6: When MAIN Switch is Turned "ON", Auto-cruise Control Indicator Lamp Inside Combination Meter does not Illuminate. (However, Auto-cruise Control is Normal).

[17] ENGINE AND EMISSION CONTROL - - AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM> - SYMPTOM PROCEDURES - Inspection Procedure 6: When MAIN Switch is Turned "ON", Auto-cruise Control Indicator Lamp Inside Combination Meter does not Illuminate. (However, Auto-cruise Control is Normal).

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Inspection Procedure 6: When MAIN Switch is Turned "ON", Auto-cruise Control Indicator Lamp Inside Combination Meter does not Illuminate. (However, Auto-cruise Control is Normal).

CIRCUIT OPERATION The engine-A/T-ECU detects MAIN switch "ON" signal to illuminate the auto-cruise control indicator lamp on the combination meter.
COMMENTS ON TROUBLE SYMPTOM Connector(s), wiring harness between the PCM and the combination meter, the combination meter and the engine-A/T-ECU may be defective. The auto-cruise control switch input signal circuit may also be defective.
PROBABLE CAUSES Malfunction of the combination meter Malfunction of the connector. Malfunction of the harness. Malfunction of the engine-A/T-ECU
DIAGNOSIS PROCEDURE

STEP 1. Check that the indicator light inside the combination meter illuminates. Turn the ignition switch to the "ON" position. Check the indicator lights other than "CRUISE" indicator light illuminate. Q: Is the check result normal? YES: Go to Step 6 . NO: Go to Step 2.
STEP 2. Connectors check: C-04 combination meter connector, C-205 junction block connector Q: Is the check result normal? YES: Go to Step 3 . NO: Repair or replace the damaged components. Then go to Step 13.
STEP 3. Check the harness between combination meter connector C-04 terminal No.42 and junction block connector C-205 terminal No.25. Q: Is the check result normal? YES: Go to Step 4 . NO: Repair the damaged harness wire. Then go to Step 13.
STEP 4. Check fuse number 2 at the junction block. Q: Is the check result normal? YES: Go to Step 5 . NO: Replace the fuse. Then go to Step 13.
STEP 5. Check that the indicator light inside the combination meter illuminates. Turn the ignition switch to the "ON" position. Check that the indicator light inside the combination meter illuminates. Q: Is the check result normal? YES: It can be assumed that this malfunction is intermittent. NO: Replace the combination meter. (Refer to GROUP 54A, Combination meter assembly ). Then go to Step 13.
STEP 6. Check the MUT-II/III diagnosis code No.15. Q: Is the MUT-II/III diagnosis code No.15 set? YES: Repair the auto-cruise control switch system (Refer to , diagnosis code Procedures - Code No.15: Auto-cruise Control Switch System). Then go to Step 13 . NO: Go to Step 7.
STEP 7. Measure the voltage at engine-A/T-ECU connector C-134. Turn the ignition switch to the "ON" position. Measure the voltage between engine-A/T-ECU connector C-134 terminal No.13 and earth. OK: MAIN switch "ON": 0.5 V or less MAIN switch "OFF": system voltage Q: Is the check result normal? YES: Go to Step 12 . NO: Go to Step 8.
STEP 8. Connectors check: C-05 combination meter connector, C-106 intermediate connector <L.H. drive vehicles> or C-104 intermediate connector <R.H. drive vehicles>, C-134 engine-A/T-ECU connector Q: Is the check result normal? YES: Go to Step 9 . NO: Repair or replace the damaged components. Then go to Step 13.
STEP 9. Check the harness between combination meter connector C-05 terminal No.19 and engine-A/T-ECU connector C-134 terminal No.13. Q: Is the check result normal? YES: Go to Step 10 . NO: Repair the damaged harness wire. Then go to Step 13.
STEP 10. Check the auto-cruise control indicator light bulb. Remove the combination meter (Refer to GROUP 54A, Combination Meter Assembly ), and check the auto-cruise control indicator bulb. Q: Is the check result normal? YES: Install the combination meter (Refer to GROUP 54A, Combination meter assembly ). Then go to Step 11. NO: Replace the bulb and install the combination meter (Refer to GROUP 54A, Combination meter assembly ). Then go to Step 13.
STEP 11. Measure the voltage at engine-A/T-ECU connector C-134. Disconnect engine-A/T-ECU connector C-134 and measure at the harness side. Turn the ignition switch to the "ON" position. Measure the voltage between engine-A/T-ECU connector C-134 terminal No.13 and earth. OK: ignition switch "ON": system voltage ignition switch "OFF": 0.5 V or less Q: Is the check result normal? YES: Go to Step 12 . NO: Replace the combination meter (Refer to GROUP 54A, Combination meter assembly ). Then go to Step 13.
STEP 12. Retest the system. Q: Does a malfunction take place again? YES: Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ). Then go to Step 13. NO: It can be assumed that this malfunction is intermittent.
STEP 13. Retest the system. Q: Does a malfunction take place again? YES: Return to Step 1 . NO: The procedure is complete.

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