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11B-50 ANTITHEFT SYSTEM DTC 29 Broken Wire To Immobilizer Step Action Value (s) Yes No 1 Was the Antitheft System Check performed? — Go to Step 2 Go to antitheft System Check 2 Recheck the DTC. 1. Key position is “OFF”. 2. Install the scan tool on vehicle. 3. Key position is “ON”. 4. Check the DTC on the Tech-2. — Go to Step 3 Refer to Diagnostic Aids 3 Check the antitheft/immobilizer communication line 1. Key position is “OFF”. 2. Disconnect the antitheft control unit (ACU). 3. Disconnect the immobilizer control unit (ICU). 4. Check the antitheft/Immobilizer communication line circuit for an open, short to ground. Also, check the ICU and ACU ignition feed circuits for Was a problem found? — Go to Step 4 Go to Step 5 4 Repair or replace the antitheft/Immobilizer Was the action complete? — Verify repair — 5 Replace the antitheft control unit (ACU). IMPORTANT: The replacement ACU must be programmed the security data by the Tech-2. Was the action complete? — Verify repair —
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