Inspection Procedure P-15: The signal from the central door lock switch (incorporated with the power windows main switch) is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.


COMMENTS ON TROUBLE SYMPTOM
Input signal from the central door lock switch (incorporated with the power window main switch) is used to operate the central door locking function. If the signal is abnormal, the central door locking function will not work normally.

POSSIBLE CAUSES

  • The central door lock switch (built into the power window main switch) is defective.
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Connector check: F-05 power window main switch connector

Q. Is the check result normal?

Go to Step 2.

Repair the defective connector.

Step 2. Check the central door lock switch (incorporated with the power window main switch).
Refer to GROUP 42 - Door .

Q. Is the check result normal?
Go to Step 3.
Replace the power window main switch.

Step 3. Resistance measurement at the F-05 power window main switch connector.

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between F-05 power window main switch connector terminal No.2 and body earth
OK: 2 Ω or less

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

Step 4. Check the wiring harness between F-05 power window main switch connector terminal No.2 to body earth.


note Prior to the wiring harness inspection, check intermediate connector C-14, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

Step 5. Connector check: C-220 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

Step 6. Check the wiring harness from F-05 power window main switch connector terminal Nos. 5 and 13 to C-220 ETACS-ECU connector terminal Nos. 34 and 33.



note Prior to the wiring harness inspection, check intermediate connector C-14, and repair if necessary.

  • Check the input line for open circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the wiring harness.

Step 7. Retest the system.
Check that the central door lock switch (incorporated with the power window main switch) signal is received normally.

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.