Pinpoint Test D : B10D7:87: Notes

Refer to Passive Anti-Theft System for schematic and connector information.

Normal Operation and Fault Conditions 

The BCM supplies voltage to the PATS transceiver. When the ignition changes to RUN or START, the BCM initiates the key interrogation sequence. The BCM starts the interrogation sequence by generating a signal and sending that signal to the PATS transceiver on the transmit (TX) circuit. When the PATS transceiver receives the signal from the BCM, it reads the PATS key and generates a challenge response to the BCM signal. The PATS transceiver sends the challenge response back to the BCM on the receive (RX) circuit.

BCM DTC Fault Trigger Conditions 

Possible Causes: 

• Fuse
• Wiring, terminals or connectors
• PATS transceiver
• BCM

Visual Inspection and Diagnostic Pre-checks 

• Check the BCM fuse 59 (5A) and make sure it is OK.