Inspection Procedure P-12: All the door switch signals are not received.


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


COMMENTS ON TROUBLE SYMPTOM
Input signals from all the door switches and tailgate switch are used to operate the functions below. If the signal(s) are abnormal, these functions will not work normally.

  • Keyless entry system
  • Room lamps

POSSIBLE CAUSES

  • Malfunction of the door switches
  • Malfunction of the tailgate switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signal from the driver’s door switch.
System switch
 Check conditions
Driver’s door switch
 When the driver’s door is opened
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure P-4 "The driver’s door switch signal is not received ."

Step 2. Connector check: D-17 (front: LH), D-08 (rear: RH) or D-13 (rear: LH) door switch connectors or G-18 <tailgate> tailgate switch connector, and C-219, C-220 and C-221 ETACS-ECU connector



Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

Step 3. Check the installation condition.
Check that the door switch is installed on the body correctly.

Q. Is the check result normal?
Go to Step 4.
Correct the installation condition.

Step 4. Check the door switch.
Refer to GROUP 42 - Door .

Q. Is the check result normal?
Go to Step 5.
Replace the door switch.

Step 5. Check the wiring harness from terminal No.1 of the D-17 (front: LH), D-08 (rear: RH) or D-13 (rear: LH) door switch connector or terminal No.1 of the G-18 tailgate switch connector to terminal No.65 (front: LH), No.70 (rear: RH), No.7 (rear: LH) or No.37 (tailgate) of the C-219, C-220 and C-221 ETACS-ECU connector.






note Prior to the wiring harness inspection, check intermediate connector C-16 (front: LH, rear: RH and tailgate) or G-14 <tailgate> and junction block connector C-210 (rear: LH) and repair if necessary.

  • Check the input line for open circuit.

Q. Is the check result normal?

Go to Step 6.

Repair the wiring harness between each of the door switches and the ETACS-ECU.

Step 6. Retest the system.
Check that all the all door switch signals are 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.