Inspection Procedure 9: The tailgate switch signal is not received.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.










COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



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

DIAGNOSIS PROCEDURE

STEP 1.Connector check: F-47 tailgate switch connector

Q. Is the check result normal?
Go to Step 2.
Repair the defective connector.

STEP 2. Tailgate switch check
Refer to GROUP 42A - Tailgate .

Q. Is the check result normal?
Go to Step 3.
Replace the tailgate switch.

STEP 3. Resistance measurement at the F-47 tailgate switch connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the F-47 tailgate switch connector terminal No. 1 and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 5.
Go to Step 4.

STEP 4. Wiring harness check between the F-47 tailgate switch connector terminal No. 1 and the body earth
Check the earth wires for open circuit.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 5. Connector check C-313 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 6.
Repair the defective connector.

STEP 6. Wiring harness check between the F-47 tailgate switch connector terminal No. 2 and the C-313 ETACS-ECU connector terminal No. 5.
Check the input line for open circuit.
note Prior to the wiring harness inspection, check intermediate connector D-17 and F-39, and repair if necessary.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. M.U.T.-III data list

    Open the tailgate.
Item No.
 Item name
 Normal condition
Item 260
 Trunk/gate trunk ajar switch
 Open
OK: Normal condition is displayed.

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