DTC 24 (L3 AND MZR-CD (RF-TURBO) ENGINE FOR EUROPEAN (L.H.D.U.K) SPECS.)

BME090267000217

DTC 24

Open or short circuit in wiring harness between immobilizer unit and PCM

POSSIBLE CAUSE

• Defective immobilizer unit
• Defective PCM
• Poor connection of connector
• Defective wiring harness

Diagnostic procedure

STEP

INSPECTION

ACTION

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.
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.
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.