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DTC 24

BME090267000W17

DTC 24 | Open or short circuit in wiring harness between immobilizer unit and PCM
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POSSIBLE CAUSE | • Defective immobilizer unit • Defective PCM • Poor connection of connector • Defective wiring harness

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT CONNECTOR CONNECTION • Are both immobilizer unit and PCM connectors connected properly? | Yes | Go to next step.
No | Connect connectors properly.
2 | INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY • Disconnect immobilizer unit and PCM connectors. • Is there continuity between immobilizer unit connector terminal A and PCM terminal 2Q (L3), 59 (AJ) or 54 (MZR-CD (RF Turbo))? | Yes | Go to next step.
No | Repair wiring harness between PCM and immobilizer unit.
3 | INSPECT IMMOBILIZER UNIT FOR SHORT TO GND • Is there continuity between immobilizer unit connector terminal A and ground? | Yes | Repair short circuit in wiring harness between PCM and immobilizer unit.
No | Go to next step.
4 | INSPECT COMMUNICATION CIRCUIT • Connect PCM connector. • Turn ignition switch to ON position. • Measure voltage at immobilizer unit connector terminal A. • Is voltage more than 10 V? | Yes | Replace immobilizer unit and reprogram immobilizer system. (See Immobilizer Unit Replacement.)

  Note

  • Confirm that voltage at immobilizer unit connector terminal L is more than 10 V when turning ignition switch to ON position after repairing malfunction of DTC 24. If not as specified, repair wiring harness between ENGINE 10 A fuse and immobilizer unit.

No | Replace PCM and reprogram immobilizer system. (See PCM Replacement.)

  Note

  • Confirm that voltage at immobilizer unit connector terminal L is more than 10 V when turning ignition switch to ON position after repairing malfunction of DTC 24. If not as specified, repair wiring harness between ENGINE 10 A fuse and immobilizer unit.