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 the communication error between ECM and the immobilizer-ECU continues for 2 seconds or more.
or

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

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

- Malfunction of CAN system.

- Malfunction of immobilizer system.

- 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 3.

STEP 2. Using scan tool MB991958, diagnose CAN bus line.

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

(2)Diagnose CAN bus line.

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

Q. Is the CAN bus line normal?

YES Go to Step 3.
NO Repair the CAN bus line. CAN Bus Diagnostics Chart. Then go to Step 4.
STEP 3. 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 4.
STEP 4. 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. When the ECM is replaced, register the ID code. Refer to ID registration procedure manual - ID codes registration judgement table [Vehicles with KOS] or ID registration procedure manual - ID codes registration judgement table [Vehicles with WCM].
NO It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.