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 liftgate 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
- Malfunction of the liftgate lock key cylinder switch
- Malfunction of the trunk lid lock key cylinder switch
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles communication interface
- MB991827: MUT-III USB cable
- MB991911: MUT-III Main harness B

STEP 1. 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 2.

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 2. Check the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch ground circuit 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 at the harness side.

2. Measure the resistance between terminal 2 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 5.

NO: Go to Step 3.

STEP 3. Check the liftgate lock key cylinder switch connector F-10 or the trunk lid lock key cylinder switch connector F-10 for damage.

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 4.

NO: Repair or replace it. 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 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: There is no action to be taken.

NO: Repair it. 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 the liftgate lock key cylinder switch connector F-10 or the trunk lid lock key cylinder switch connector F-10 and ETACS-ECU connector C-117 for damage.

Q: Are the liftgate lock key cylinder switch or the trunk lid lock key cylinder switch connector F-10 and ETACS-ECU connector C-117 in good condition?

YES: Go to Step 6.

NO: Repair or replace them. 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: After checking intermediate connector C-90, check the wires. If intermediate connector C-90 is damaged, repair or replace it. Refer to 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: Repair them.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 .