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?

Go to Step 2.

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?

	Refer to GROUP 42B, Diagnosis - Diagnostic Trouble Code Chart <Vehicles with KOS> or GROUP 42C, diagnosis - Diagnostic Trouble Code Chart <Vehicles with WCM> .

	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?

	Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, ID Code Registration Necessity Judgment Table <Vehicles with KOS> or GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> .

	It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .