8. Cruise Control Indicator Does Not Illuminate (Cruise Normal)

Auto-cruise Control Indicator Light Drive Circuit:

Connectors:

CIRCUIT OPERATION
The power for the auto-cruise indicator in the combination meter is supplied from the ignition switch (1G1). When the auto-cruise control system is operating, the transistor inside the auto-cruise control-ECU illuminates the auto-cruise indicator through ECU terminal number 15.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably the malfunction of the indicator bulb or the malfunction of the connector or harness.

TROUBLESHOOTING HINTS
The most likely causes for this code to be set are:
- Malfunction of the indicator bulb.
- Damaged connector and harness.
- Malfunction of the auto-cruise control-ECU.

DIAGNOSIS

STEP 1. Check the auto-cruise control indicator bulb.
1. Remove the combination meter.
2. Check the auto-cruise control indicator bulb.

If the bulb is blown, replace it. Then check that the malfunction is eliminated.

If the bulb is not blown, go to Step 2.




STEP 2. Check the circuit at combination meter connector C-29.
1. Disconnect connector C-29 and measure at the harness side.
2. Measure the voltage between harness connector terminal 29 and ground.
- Battery positive voltage

If circuit check made at connector C-29 shows battery positive voltage, go to Step 3. Then check that the malfunction is eliminated.

If circuit check made at connector C-29 does not show battery positive voltage, go to Step 4.







STEP 3. Check harness connectors C-29 at the combination meter and C-52 at the auto-cruise control-ECU for damage.
If harness connectors C-29 at the combination meter and C-52 at the auto-cruise control-ECU are damaged, repair or replace them. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.

If the harness connectors are in good condition, go to Step 5.







STEP 4. Check harness connectors C-29 at the combination meter and C-73 at the junction block for damage.
If harness connectors C-29 at the combination meter and C-73 at the junction block are damaged, repair or replace them. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.

If the harness connectors are in good condition, go to Step 6.







STEP 5. Check the harness wires between the combination meter connector C-29 and auto-cruise control-ECU connector C-52.
If any harness wires between combination meter connector C-29 and auto-cruise control-ECU connector C-52 are damaged, repair or replace them. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.






NOTE: After checking intermediate connector C-30, inspect the wire. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.







STEP 6. Check the harness wire between combination meter connector C-29 and junction block connector C-73.
If any harness wire between combination meter connector C-29 and junction block connector C-73 is damaged, repair or replace it. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.






NOTE: After checking intermediate connector C-78, inspect the wire. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.