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11B-66 ANTITHEFT SYSTEM DTC 125 Output Alarm Horn Broken Wire 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 Tech-2 on vehicle. 3. Key position is “ON”. 4. Check the DTC on the Tech-2. — Go to Step 3 Refer to Diagnostic Aids 3 1. Check the alarm horn circuit for an open, short to ground, or short to voltage.
Also, check the alarm horn connector for damage. 2. If a problem found, repair as necessary. — Verify repair Go to Step 4 4 Check the alarm horn function. 1. Key position is “OFF”. 2. Connect a jumper wire between ACU terminal 5 and body ground. 3. Key position is “ON”. 4. Observe to operate sound with the alarm horn. Was the problem found? — Verify repair Go to Step 5 5 Replace the antitheft control unit (ACU). IMPORTANT: The replacement ACU must be Was the action complete? — Verify repair —
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