Before
replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication
circuit are normal.
When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition
key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine
cannot be started. Register the encrypted code as described in Immobilizer System - How
to Register Key ID .)
DIAGNOSTIC FUNCTION
When the hazard warning lamp fuse is blown, the ETACS-ECU sets the diagnosis code No.
B16A6.
JUDGEMENT CRITERIA
With the diagnosis code not set, when the blown fuse of hazard warning lamp is detected
three times consecutively, the ETACS-ECU sets the diagnosis code No. B16A3.
PROBABLE CAUSES
Damaged harness wires and connectors
Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Fuse check
Check if the turn-signal lamp fuse is normal.
Q.
Is the check result normal?
Go to Step 2.
Replace the turn-signal lamp fuse.
STEP 2. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
.)
Replace the turn-signal lamp fuse.