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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION CHART

DTC detecting condition Trouble area
P1644: Immobilizer ID Mismatched 
Verification error between ECM and keyless start control module.
  • Remote controller
  • ECM ID code is not registered in keyless start control module
  • Remote controller is not registered
  • Engine switch circuit/connector
  • Engine switch
  • Keyless start control module power supply/ground circuit
  • ECM
  • Keyless start control module
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