Test J-6: Headlight Automatic Shutdown Function Malfunction

Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. If DTC sets when ignition switch is turned to LOCK position, diagnose DTC. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. If DTC does not set, go to next step.
Check input signals for:
- Ignition switch (IG1).
- Driver's door switch.
- Taillight switch.
- Headlight switch.
See appropriate tests in INPUT SIGNAL CHECK FUNCTION under SELF-DIAGNOSTIC SYSTEM. If input signal test shows a fault, check indicated circuit. See TEST O-2: IGNITION SWITCH IG1 CIRCUIT CHECK , TEST O-10: DRIVER'S OR PASSENGER'S DOOR SWITCH CIRCUIT CHECK or TEST O-17: LIGHTING SWITCH CIRCUIT CHECKS . If input signal test is okay, replace ETACS-ECU or front-ECU and retest headlight automatic shutdown function.