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Home >> Suzuki >> 2012 >> SX4 Crossover, Automatic CVT Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Immobilizer Control System >> Diagnostic Information and Procedures >> DTC P1621: Immobilizer Communication Line Error >> Detecting Condition and Trouble Area
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Detecting Condition and Trouble Area

P1621: DETECTING CONDITION AND TROUBLE AREA

Detecting Condition Trouble Area
Communication error between ICM and ECM.
  • Related fuse(s) blown
  • Poor connection at ICM connector
  • Poor connection at ECM connector
  • Power supply circuit
  • Ground circuit
  • Communication circuits between ICM and ECM
  • ICM
  • ECM
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