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11A-38 IMMOBILIZER SYSTEM (C24SE, 4JA1-T) B0004 IMMOBILIZER COIL CIRCUIT (ANTENNA COIL FAULT) Step Action Value(s) Yes No 1 Was the "Immobilizer System Check" performed? Go to Step 2 Go to Immobilizer System Check 2 Check the immobilizer coil (antenna) circuit. 1. Key position is “OFF”. 2. Disconnect the immobilizer control unit (ICU). (immobilizer coil circuit : 3 pin connector) 3. Check the immobilizer coil circuit for an open, short to ground, or short to voltage. Also, check the ICU ignition feed circuit for an open or Was a problem found? Go to Step 3 Go to Step 4 3 Repair or replace the immobilizer coil (antenna). Was the action complete? Verify repair 4 Recheck the DTC. 1. Key position is “OFF” and keep the position for more than 30 seconds. 2. Key position is “ON”. 3. Check the DTC on scan tool. Is DTC B0004 stored? Go to Step 5 Verify repair 5 Replace the immobilizer control unit (ICU). IMPORTANT: The replacement ICU must be Was the action complete? Verify repair
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