Inspection Procedure N-6

INSPECTION PROCEDURE N-6: ETACS-ECU does not receive any signal from the trunk lid latch assembly.


















CIRCUIT OPERATION

The ETACS-ECU operates the trunk light according to signal from the trunk lid latch assembly.

TECHNICAL DESCRIPTION (COMMENT)

The trunk lid latch assembly input signal is used to operate the trunk light. If the signal fails, this function will not work normally.

TROUBLESHOOTING HINTS

- The trunk lid latch assembly 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 trunk lid latch assembly connector F-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is trunk lid latch assembly connector F-05 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 trunk lid latch assembly should be normal.

STEP 2. Check the trunk lid latch assembly.





Remove the trunk lid latch assembly. Component Tests and General Diagnostics.





Q. Is the trunk lid latch assembly in good condition?

YES Go to Step 3.

NO Replace the trunk lid latch assembly. The input signal from the trunk lid latch assembly should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

STEP 3. Check ETACS-ECU connector C-217 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-217 in good condition?

YES Go to Step 4.

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 trunk lid latch assembly should be normal.

STEP 4. Check the wiring harness between trunk lid latch assembly connector F-05 (terminal 2) and ETACS-ECU connector C-217 (terminal 37).

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













NOTE:
Also check intermediate connector C-28 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-28 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between trunk lid latch assembly connector F-05 (terminal 2) and ETACS-ECU connector C-217 (terminal 37) 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 trunk lid latch assembly 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 trunk lid latch assembly should be normal.