Inspection Procedure O-4

INSPECTION PROCEDURE O-4: Theft-alarm System: Headlights (high-beam) do not flash when the theft-alarm system is triggered.

TECHNICAL DESCRIPTION (COMMENT)
If the headlights (high-beam) illuminate normally, the front-ECU or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS
- The front-ECU may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

STEP 1. Check the headlight (high-beam) operation.

Q: Do the headlights illuminate at high beam normally?

YES: Go to Step 2.

NO: Refer to Inspection Procedure H-3 "Headlights (high- beam) does not illuminate."

STEP 2. Replace the ECU.

1. Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table in Anti-theft and Alarm Systems.
2. The headlights should flash at high beam when the theft-alarm system is triggered.

Q: Do the headlights flash at high beam when the theft-alarm system is triggered?

YES: No action is necessary and testing is complete.

NO: Replace the front-ECU. The headlights should flash at high-beam when the theft-alarm system is triggered.