Inspection Procedure N-5

INSPECTION PROCEDURE N-5: ETACS-ECU does not receive any signal from the liftgate latch switch. [ECLIPSE]


















CIRCUIT OPERATION

The ETACS-ECU operates the luggage compartment light according to signal from the liftgate latch switch.

TECHNICAL DESCRIPTION (COMMENT)

The liftgate latch switch input signal is used to operate the luggage compartment light. If the signal fails, this function will not work normally.

TROUBLESHOOTING HINTS

- The liftgate latch switch may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check liftgate latch switch connector F-09 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is liftgate latch switch connector F-09 in good condition?

YES Go to Step 2.

NO Repair or replace the damaged component(s). Harness Connector Inspection. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.

STEP 2. Check the liftgate latch switch.





Remove the liftgate latch switch. Component Tests and General Diagnostics.





Q. Is the liftgate latch switch in good condition?

YES Go to Step 3.

NO Replace the liftgate latch switch. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.

STEP 3. Check the ground circuit to the liftgate latch switch. Measure the resistance at liftgate latch switch connector F-09.





(1)Disconnect liftgate latch switch connector F-09 and measure the resistance available at the wiring harness side of the connector.





(2)Measure the resistance value between terminal 2 and ground.

- The resistance should be 2 ohms or less.

Q. Is the measured resistance 2 ohms or less?

YES Go to Step 5.

NO Go to Step 4.

STEP 4. Check the wiring harness between liftgate latch switch connector F-09 (terminal 2) and ground.

- Check the ground wire for open circuit.





Q. Is the wiring harness between liftgate latch switch connector F-09 (terminal 2) and ground in good condition?

YES No action is necessary and testing is complete.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.

STEP 5. Check ETACS-ECU connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-218 in good condition?

YES Go to Step 6.

NO Repair or replace the damaged component(s). Harness Connector Inspection. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.

STEP 6. Check the wiring harness between liftgate latch switch connector F-09 (terminal 1) and ETACS-ECU connector C-218 (terminal 62).

- Check the communication lines for open circuit and short circuit.













NOTE:
Also check intermediate connector C-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-23 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between liftgate latch switch connector F-09 (terminal 1) and ETACS-ECU connector C-218 (terminal 62) in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. If the functions described in "CIRCUIT OPERATION" work normally, the input signal from the liftgate latch switch should be normal.