P1645

DTC P1645: ID Code Communication Error

Wiring Diagram

Immobilizer Control System Wiring Circuit Diagram

DTC Detecting Condition and Trouble Area






Troubleshooting

1. DTC check of ECM

Check ECM for DTC referring to DTC Check DTC Check.

Is DTC U0073, U0101, U0121, U0140 and/or U0155 detected?
YES -
Go to applicable DTC diag. flow.
NO -
Go to Step 2.

2. CAN communication circuit check

Disconnect connectors of all control modules communicating by means of CAN.
Check CAN communication circuit between control modules for open, short and high resistance.

Is each CAN communication circuit in good condition?
YES -
Replace ID controller with new one. If DTC P1645 is still detected, substitute a known-good ECM and recheck.
NO -
Repair circuit.