Inspection Procedure B-1: Electric tailgate main switch signal is not received.


caution Before replacing the ECU, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM


The wiring harness or its connector(s) between the electric tailgate control unit and the electric tailgate main switch, the electric tailgate main switch itself, or the electric tailgate control unit itself may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Electric tailgate main switch check


Check the electric tailgate main switch (refer to ).

Q. Is the check result normal?

Go to Step 2.

Replace the electric tailgate main switch.

STEP 2. Resistance measurement at electric tailgate main switch connector (earth line terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between electric tailgate main switch connector (earth line terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. Check of open circuit in earth line between electric tailgate main switch connector and body earth.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in MASW line between electric tailgate control unit connector and electric tailgate main switch connector.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 5. System retest


Check that the electric tailgate main switch signal is received normally.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

Replace the electric tailgate control unit.