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11B-38 ANTITHEFT SYSTEM Antitheft System Check Step Action Value (s) Yes No 1 1. Key position is “ACC”, shut all doors and bonnet. 2. Observe the antitheft lamp. Note: When a key switch is “ACC”, antitheft lamp will Is the antitheft lamp "ON” or flashing? — Go to Step 2 Go to “No antitheft lamp” 2 1. Key position is “ON”, engine “OFF”. 2. Observe the antitheft lamp. 3. Key position is turned “ACC”. 4. Check the antitheft lamp will be turned flashing and lamp will be turned ACC after 10 seconds. Is the antitheft lamp flashing? — Go to DTC table Go to Step 3 3 1. Key position is “OFF”. 2. Install the Tech-2. 3. Key position is “ON” or “OFF”. 4. Attempt to display antitheft data with the Tech-2. — Go to Step 9 Go to Step 4 4 1. Key position is “OFF”, disconnect the antitheft control unit (ACU). 2. Check the DLC (Data Link Connector) circuit for an open, short to ground, or short to voltage. Also, check the DLC ignition feed circuit for an open Was a problem found? — Go to Step 5 Go to Step 6 5 Repair or replace the DLC (Data Link Connector) Was the action complete? — Go to Step 3 — 6 1 Check the ACU ground circuit for an open, or short to voltage. Also, check the ACU ignition feed circuit for an open or short to ground and the ACU ground circuit for an open. 2 If a problem is found, repair as necessary. — Verify repair Go to Step 7 7 Replace the antitheft control unit (ACU). IMPORTANT: The replacement ACU must be Was the action complete? — Go to Step 8 — 8 Select “Display DTCs” with the Tech-2. Are any DTCs stored? — Go to applicable DTC table — 9 1 Observe the antitheft data list on Tech-2. 2 If a problem is found, repair as necessary. — System OK Go to applicable section
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