INSPECTION PROCEDURE E-4: Keyless Entry System: The liftgate is not opened when the keyless entry transmitter "LIFTGATE" button is operated.: Diagnosis
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: MUT-III USB Cable
- MB991910: MUT-III Main Harness A
- STEP 1. Check the operation of the central door locking system.
Check that the liftgate can be locked and unlocked when the central door locking system is operated.
Q: Does the liftgate work normally?
YES : Go to Step 2.
NO : Refer to INSPECTION PROCEDURE C-2 "SOME DOORS DO NOT LOCK OR UNLOCK ."
- STEP 2. Check that the doors can be locked and unlocked by using the keyless entry transmitter.
Q: Can the doors be locked and unlocked normally when the keyless entry transmitter is operated?
YES : Go to Step 3.
NO : Refer to INSPECTION PROCEDURE E-1 "KEYLESS ENTRY SYSTEM DOES NOT OPERATE ."
- STEP 3. Check the input signal (by using the pulse check mode of the monitor).
Check input signals from the transmitter.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.- Connect scan tool MB991958. Refer to "HOW TO CONNECT SWS MONITOR ."
- Operate scan tool MB991958 according to the procedure below to display "Pulse check."
- Select "Interactive Diagnosis."
- Select "System select."
- Select "SWS."
- Select "Pulse Checking."
- Push the transmitter "LIFTGATE" button.
- Check that scan tool MB991958 sounds
Q: When the transmitter "LIFTGATE" button is turned ON, does scan tool MB991958 sound?
YES : Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE . All the doors can be locked or unlocked by means of the transmitter.
NO : Refer to INSPECTION PROCEDURE N-8 "ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE LOCK, UNLOCK, LIFTGATE OR PANIC SWITCH ."