INSPECTION PROCEDURE C-2: The central door locking system does not function by using the driver's door lock switch.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENT ON TROUBLE SYMPTOM
If the central door locking system does not work normally only when the driver's door lock switch is operated, the driver's door lock actuator or the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the driver’s door lock acutuator
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ETACS switch data by using the SWS monitor
Check the ETACS-ECU signal, which is related to the driver's door lock operation.

  • Driver’s door: Unlock → Lock
Item No.
 Item name
 Normal condition
Item 21
 DR DOR LCK SW
 from OFF to ON
Item 22
 DR DOR ULK SW
 from ON to OFF
OK: Normal condition are displayed for all the items.

Q. Are the check result normal?
Go to Step 2.
Refer to inspection procedure P-13 "The driver’s door lock actuator switch signal is not received ."

Step 2. Retest the system.
Check that the central door locking system works normally by the driver's door lock operation.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.