- No communication with the module - passive anti-theft system (PATS) module
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- Fuses.
- Circuitry.
- PATS module
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- The anti-theft indicator is always/never on - no three-second anti-theft indicator prove-out
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- PATS module.
- Circuitry.
- Fuse.
- Theft indicator.
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- The vehicle does not start--theft indicator proves out for three seconds as normal
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- Less than two keys programmed to the system.
- Transceiver not connected/defective.
- Circuitry.
- Transceiver internal antenna damaged.
- Non-PATS key, damaged key or no code received.
- Partial key read of PATS key.
- Unprogrammed PATS key.
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- CARRY OUT PATS on-demand self-test. RETRIEVE DTCs. If DTCs are present, GO to PATS Diagnostics Trouble Code (DTC) Index. If no DTCs are retrieved, CHECK for other possible no-start causes.
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- No powertrain control module (PCM) ID stored in PATS.
- PATS/PCM ID do not match.
- Problem with Standard corporate protocol (SCP) link.
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- CLEAR the stored DTCs. Cycle the ignition key from OFF to RUN. Retrieve continuous DTCs. If DTCs are present, GO to PATS Diagnostics Trouble Code (DTC) Index. If no DTCs are retrieved, CHECK for other possible causes.
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- The alarm system does not operate correctly - the vehicle starts but flashes a fault code on theft indicator at key ON
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- Incorrect PCM calibration.
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