Inspection Procedure 2

The Ignition Key cannot be Registered.

TECHNICAL DESCRIPTION (COMMENT)
The ignition key transponder or the immobilizer-ECU is suspected to be defective.

TROUBLESHOOTING HINTS
- Malfunction of the ignition key
- Malfunction of immobilizer-ECU

DIAGNOSIS

Required Special Tools:
- MB991502: Scan Tool (MUT-II)
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991911: Main Harness B

STEP 1. Using scan tool MB991502 or MB991958, read the diagnostic trouble code (DTC).

CAUTION: To prevent damage to scan tool MB991502 or MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502 or MB991958.

Use scan tool MB991502 or MB991958 to check if DTC 11 is set.







1. Connect scan tool MB991502 or MB991958 to the data link connector.
2. Turn the ignition switch "ON" position.
3. Read the immobilizer system diagnosis code.

Q:Does DTC 11 reset?

YES: Refer to Diagnostic trouble Code Chart.

NO: Replace the ignition key that cannot be registered. Then re-register the encrypted code. Verify that the ignition key can be registered, then Go to Step 2.

STEP 2. Retest the system.

Q: Does registered ignition key function properly?

YES: The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction).

NO: Replace the immobilizer-ECU.