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Home >> Suzuki >> 2007 >> Grand Vitara Base, AWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC P1645: ID Code Communication Error >> Troubleshooting
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DTC P1645: ID Code Communication Error: Troubleshooting

WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLESHOOTING PROCEDURES

Step Action YES NO
1  DTC check of ECM 
  1. Check ECM for DTC referring to DTC Check.

Is DTC U0073, U0101, U0121 and / /or U0140 detected? 		 Go to applicable DTC diag. flow. Go to Step 2.
2  CAN communication circuit check 
  1. Disconnect connectors of all control modules communicating by means of CAN.
  2. Check CAN communication circuit between control modules for open, short and high resistance.

Is each CAN communication circuit in good condition? 		 Replace ID controller with new one. If DTC P1645 is still detected, substitute a known-good ECM and recheck. Repair circuit.
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