Inspection Procedure 4

Inspection Procedure 4: Panic alarm does not work normally.

TECHNICAL DESCRIPTION (COMMENT)
If keyless operation system or keyless entry system is normal, the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS
- Keyless operation system or keyless entry system may be defective
- The ETACS-ECU may be defective
- Function is not set with the customization.
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:
- MB992006: Extra fine probe
- MB991223: Harness set
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, read the diagnostic trouble code.

Check if DTC is set to the KOS-ECU or WCM .

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.

1. Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III)." How to Connect the Scan Tool (M.U.T.- III)
2. Turn the ignition switch to the "ON" position.
3. Check whether the KOS or WCM related DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Troubleshoot the KOS (Refer to KOS).

YES : Troubleshoot the WCM (Refer to WCM).

NO : Go to Step 2

STEP 2. Check keyless operation system or keyless entry system .

Q: Do keyless operation system or keyless entry system work normally?

YES : Go to Step 3.

NO : Troubleshoot the KOS (Refer to KOS).

NO : Troubleshoot the WCM (Refer to WCM).

STEP 3. Using scan tool MB991958, check the configuration function.

1. Turn the ignition switch to the "ON" position.
2. Use the ETACS-ECU configuration function to check that the "Panic alarm switch" is set to "Enable".
3. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the "Panic alarm switch" set to "Enable"?

YES : Replace the ETACS-ECU.

NO : Use the ETACS-ECU configuration function to set the "Panic alarm switch" to "Enable". Programming and Relearning