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Inspection Procedure P-10

The Liftgate Lock Key Cylinder Switch or the Trunk Lid Lock Key Cylinder Switch Signal is not Sent to the ETACS-ECU.

Liftgate Lock Key Cylinder Switch <ECLIPSE> Or Trunk Lid Lock Key Cylinder Switch <ECLIPSE SPYDER> Input Circuit:






CIRCUIT OPERATION
The ETACS-ECU uses the input signal from the lift-gate lock key cylinder switch or the trunk lid lock key cylinder switch to arm the theft-alarm system.

TECHNICAL DESCRIPTION (COMMENT)
The liftgate lock key cylinder switch or The Trunk Lid Lock Key Cylinder Switch input signal is used to arm the theft-alarm system. If the input signal is an error, the theft-alarm system will not be armed normally.

TROUBLESHOOTING HINTS
- The liftgate lock key cylinder switch may be defective
- The trunk lid lock key cylinder 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
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles communication interface (V.C.I.)
- MB991827: MUT-III USB cable
- MB991911: MUT-III Main harness B







STEP 1. Check the liftgate lock key cylinder switch connector F-10 or the trunk lid lock key cylinder switch connector F-10 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is the liftgate lock key cylinder switch connector F-10 or the trunk lid lock key cylinder switch connector F-10 in good condition?

YES: Go to Step 2.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .













STEP 2. Check the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .

Q: Is the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch in good condition?

YES: Go to Step 3.

NO: Replace the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch . When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .

STEP 3. Check the ground circuit to the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch . Measure the resistance at trunk lid lock key cylinder switch connector F-10.







1. Disconnect liftgate lock key cylinder switch or trunk lid lock key cylinder switch connector F-10 and measure the resistance available at the wiring harness side of the connector.




2. Measure the resistance 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 harness wire between the liftgate lock key cylinder switch connector F-10 (terminal 2) or the trunk lid lock key cylinder switch connector F-10 (terminal 2) and ground.

Q: Is the harness wire between the liftgate lock key cylinder switch F-10 (terminal 2) or the trunk lid lock key cylinder switch connector F-10 (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. When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .




STEP 5. Check ETACS-ECU connector C-117 for damage.

Q: Is ETACS-ECU connector C-117 in good condition?

YES: Go to Step 6.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .













STEP 6. Check the harness wires between the liftgate lock key cylinder switch connector F-10 (terminal 1) or the trunk lid lock key cylinder switch connector F-10 (terminal 1) and ETACS-ECU connector C-117 (terminal 27).

NOTE: Also check intermediate connector C-90 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-90 is damaged, Repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Are the harness wires between the liftgate lock key cylinder switch connector F-10 (terminal 1) or the trunk lid lock key cylinder switch connector F-10 (terminal 1) and ETACS-ECU connector C-117 (terminal 27) in good condition?

YES: Replace the ETACS-ECU. When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .

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. When the theft-alarm system operates normally, check that the signal is input normally from the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch .
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