Inspection Procedure B-7: Tailgate sensor 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 tailgate sensor and the electric tailgate control unit, the tailgate sensor itself, or the electric tailgate control unit itself may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list


(1)Disconnect the negative battery terminal and wait for approximately 30 seconds.
(2)Check the signals related to the electric tailgate operation.

  • Tailgate sensor (left): OFF → ON
  • Tailgate sensor (right): OFF → ON
Item No.
 Item name
 Normal conditions
Item 9
 Touch sensor (left)
 OFF → ON
Item 10
 Touch sensor (right)
 OFF → ON
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?

All are normal. : Go to Step 7.

Normal condition is not displayed for items 9 and 10. : Go to Step 2.

Normal condition is not displayed for item No. 9. : Go to Step 3.

Normal condition is not displayed for item No. 10. : Go to Step 5.

STEP 2. Check of open circuit in TSG line between electric tailgate control unit connector and tailgate sensor (LH) and (RH) connector.


Q. Is the check result normal?

Go to Step 7.

Repair the connector(s) or wiring harness.

STEP 3. Tailgate sensor (LH) check.


Check the tailgate sensor (LH) (refer to ).

Q. Is the check result normal?

Go to Step 4.

Replace the tailgate sensor (LH).

STEP 4. Check of short to power supply, short to earth, and open circuit in TSL line between electric tailgate control unit connector and tailgate sensor (LH) connector.


Q. Is the check result normal?

Go to Step 7.

Repair the connector(s) or wiring harness.

STEP 5. Tailgate sensor (RH) check.


Check the tailgate sensor (RH) (refer to ).

Q. Is the check result normal?

Go to Step 6.

Replace the tailgate sensor (RH).

STEP 6. Check of short to power supply, short to earth, and open circuit in TSR line between electric tailgate control unit connector and tailgate sensor (RH) connector.


Q. Is the check result normal?

Go to Step 7.

Repair the connector(s) or wiring harness.

STEP 7. System retest


Check that the tailgate sensor 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.