| Diagnosis and Testing - Verify the customer concern.
- Visually inspect the following for obvious signs of mechanical or electrical damage.
Visual Inspection Chart | Mechanical | Electrical | - Large metallic objects, electronic devices on the key chain that can be used to purchase gasoline or similar items, or a second ignition key on the same key ring as the passive anti-theft system (PATS) ignition key
- Ignition lock cylinder
- PATS key
- Use of a non-PATS key
- More than one PATS key on the same key ring
| - Smart junction box (SJB) fuse(s)
- PATS transceiver
- Ignition switch
- Instrument cluster
- Powertrain control module (PCM)
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
- Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the PCM.
- If the DTCs retrieved are related to the concern, go to the Passive Anti-Theft System (PATS) Diagnostic Trouble Codes (DTC) Index to continue the diagnostics.
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