Code No.B16A3 Turn-signal (LH) circuit short



caution
  • 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




JUDGEMENT CRITERIA




PROBABLE CAUSES



  • Damaged harness wires and connectors
  • Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE


STEP 1. Check of short circuit in TL1&TL2-1 line between ETACS-ECU connector and headlamp assembly (TURN: LH) connector


Q. Is the check result normal?





STEP 2. Check of short circuit in TL1&TL2-1 line between ETACS-ECU connector and side turn-signal lamp (LH) connector <Fender panel attachment type>


Q. Is the check result normal?





STEP 3. Check of short circuit in TL3-1&TL3-2 line between ETACS-ECU connector and rear combination lamp (TURN: LH) connector


Q. Is the check result normal?





STEP 4. Check of short circuit in TL2-2 line between ETACS-ECU connector and side turn-signal lamp (LH) connector <Integrated in door mirror type>


Q. Is the check result normal?





STEP 5. Check whether the diagnosis code is reset.


(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?