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Diagnostic Trouble Code (DTC) Table: ECM

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.
NOTE: ECM detects diagnostic trouble code (DTC). ICM does not.
DIAGNOSTIC TROUBLE CODE

DTC No. Detecting Item Detecting Condition Immobilizer Indicator Light
P1614  Transponder response error Transponder code in the transponder built in the ignition key cannot be read through ICM. Flash
P1615  Steering lock unit communication error (for vehicle with keyless start system)
  • While registering the transponder code in the transponder built in the ignition key in ECM, the keyless start control module sent a signal to ECM indicating that the remote controller ID code could not be registered.
  • The remote controller ID code could not be registered in the keyless start control module or ECM. And, the registration procedure of the transponder code in the transponder built in the ignition key was terminated forcibly.
 Flash
P1616  Unregistered keyless start control module (for vehicle with keyless start system) ECM detects different ID codes registered in ECM and keyless start system. Flash
P1618  Keyless start control module CAN communication error (for vehicle with keyless start system) Reception error of communication data for keyless start control module is detected for longer than specified time continuously. Flash
P1621  Immobilizer communication line error Communication error between ICM and ECM is detected by ECM. Flash
P1622  EEPROM read/write error EEPROM in ECM is corrupted. Flash
P1623  Unregistered transponder Transponder code in the transponder built in the ignition key is invalid. Flash
P1625  Immobilizer antenna error ICM is faulty. Flash
P1636  Immobilizer information registration failure Communication error between ECM and BCM is detected by ECM. No operation
P1638  Immobilizer information mismatched
  • Communication error between ECM and BCM is detected by ECM.
  • Wrong ECM or BCM is used.
 No operation
P1645  ID code communication error No response from ID controller. Flash or light up
P1646  ID code incorrectness
  • Different ID codes registered in ECM and ID controller.
  • Communication error of ECM.
  • Transponder code is not registered in ECM.
 Flash or light up
NOTE: If any DTC other than the above DTCs is detected, refer to DTC TABLE .
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