Inspection Procedure 2: Diagnosis code No.P0513 is set to the MPI system, and the communication between M.U.T.-III and immobilizer cannot be established. <3000, 3800>
















COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of immobilizer-ECU power supply and earth
  • Damaged harness wires between the engine-ECU <M/T> or engine-A/T-ECU <A/T> and the immobilizer-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-310 key reminder switch connector, D-310-1 immobilizer-ECU connector and D-245 engine-ECU <M/T> or D-216 engine-A/T-ECU <A/T> connector

Q. Is the check result normal?
Go to Step 2.
Repair the defective connector.

STEP 2. Check the harness wires between D-310 key reminder switch connector terminal No.7 and D-245 engine-ECU <M/T> or D-216 engine-A/T-ECU <A/T> connector terminal No.65.

  • Check the power supply line for open circuit and short circuit.
note Prior to the wiring harness inspection, check intermediate connector D-229, and repair if necessary.

Q. Is the check result normal?
Go to Step 3.
Repair the wiring harness.

STEP 3. Check the harness wires between D-310 key reminder switch connector terminal No.7 and D-310-1 immobilizer-ECU connector terminal No.3.

  • Check the communication line open and short circuit.

Q. Is the check result normal?
Go to Step 4.
Replace the steering lock cylinder assembly.

STEP 4. Check the immobilizer-ECU power supply circuit and earth circuit.
Refer to Inspection Procedure 5 "Check the immobilizer-ECU power supply circuit and earth circuit" .

Q. Is the check result normal?
Go to Step 5.
Repair the power supply and earth circuit to the immobilizer-ECU.

STEP 5. Retest the system.
Check that immobilizer-ECU communicates with the M.U.T.-III.

Q. Is the check result normal?
Intermittent Malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the immobilizer-ECU and register the ignition key. (Refer to .) Then go to Step 6.

STEP 6. Retest the system.
Check that immobilizer-ECU communicates with the M.U.T.-III.

Q. Is the check result normal?
The procedure is complete.
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T> and register the ignition key. (Refer to .)