P0513

DTC P0513: Immobilizer Malfunction

TECHNICAL DESCRIPTION

- ECM monitors the communication condition with the immobilizer-ECU. When an abnormality in communication is found, ECM prevents engine start.

DTC SET CONDITIONS

Check Condition

- Ignition switch is "ON" position.
Judgment Criterion

- When it was different in the encrypted code sent from immobilizer-ECU and operation result by ECM.

FAIL-SAFE AND BACKUP FUNCTION

- Engine start is prohibited.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

- CAN system failed.
- Immobilizer system failed.
- ECM failed.

DIAGNOSIS

Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

STEP 1. Using scan tool MB991958, check VIN Information.





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 to the data link connector.
(2)Set scan tool MB991958 to the coding mode for VIN Information.
(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Has VIN (current) been written?

YES Go to Step 2.

NO Write VIN. Then go to Step 2.

STEP 2. Using scan tool MB991958, read the immobilizer diagnostic trouble code (DTC).

(1)Turn the ignition switch to the "ON" position.

(2)Read the immobilizer-DTC.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the immobilizer-DTC set?

YES Keyless Operation System (KOS) or diagnosis - Diagnostic Trouble Code Chart [Vehicles with WCM] Wireless Control Module (WCM).
NO Go to Step 3.
STEP 3. Using scan tool MB991958, read the diagnostic trouble code
(DTC)

(1)Turn the ignition switch to the "ON" position.

(2)After the DTC has been deleted, read the DTC again.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is DTC P0513 set?

YES Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
NO It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.