P1645

DTC P1645: ID Code Communication Error

Wiring Diagram

Refer to Immobilizer Control System Wiring Circuit Diagram Immobilizer Control System Wiring Circuit Diagram.

DTC Detecting Condition and Trouble Area






Troubleshooting



1.
Was "Immobilizer Control System Check" performed?
YES
Go to Step 2.
NO
Go to Immobilizer Control System Check.

2. 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 troubleshooting.
NO
Go to Step 3.

3. 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.