CAUTIONCOMMENTS ON TROUBLE SYMPTOM
The interior lamp automatic shutdown function operates in accordance with the interior
lamp loaded signal. If this signal is abnormal, the functions below will not work normally.- Ignition key cylinder illumination lamp
- Dome lamps
POSSIBLE CAUSES
- Malfunction of the ETACS-ECU
- Damaged wiring harness or connector(s)
DIAGNOSIS PROCEDURE
Step 3. Measure the voltage at the C-217 ETACS-ECU connector.
- Remove the ETACS-ECU, and measure at the junction block side.
- Ignition switch: ON
- Voltage between C-217 ETACS-ECU connector terminal No.8 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 5
.NO: Go to Step 4
.Step 4. Check the wiring harness between C-217 ETACS-ECU connector
terminal No.8 and the ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check junction block connector C-203, and repair
if necessary.
- Check the power supply line to the ignition switch (IG1) for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction 
).NO: Repair the wiring harness.
Step 5. Measure the voltage at the C-217 ETACS-ECU connector.
- Remove the ETACS-ECU, and measure at the junction block side.
- Ignition switch: ACC
- Voltage between C-217 ETACS-ECU connector terminal No.4 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 7.NO: Go to Step 6
.Step 6. Check the wiring harness between C-217 ETACS-ECU connector
terminal No.4 and the ignition switch (ACC).
NOTE: Prior to the wiring harness inspection, check junction block connector C-203, and repair
if necessary.
- Check the power supply line to the ignition switch (ACC) for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction ).NO: Repair the wiring harness.