Normal Operation

During each vehicle start sequence, when the key is turned to the START or ON position, the Passive Anti-Theft System (PATS) transceiver reads the PATS key identification code and sends the data to the Instrument Panel Cluster (IPC). If there is no communication on the High Speed Controller Area Network (HS-CAN) between the IPC and the PCM, DTCs U0100:00 and/or B10DA:86 can set in the IPC and the vehicle can experience a PATS no-start.

If DTC B10DA:61 is present, refer to DTC Charts  .

• DTC B10DA:86 (PATS PCM Identifier: Signal Invalid) - a continuous DTC that sets only when the IPC does not receive the expected response from the PCM over the HS-CAN and the fault may not be present at the time of testing. The data sent by the PCM does not match the data expected by the IPC and this DTC is set. This DTC can be caused by the HS-CAN circuits between the IPC and the PCM or by either module. This DTC can also be set if the battery voltage is low.
• DTC U0100:00 (Lost Communication With ECM/PCM "A": No Sub Type Information) - a continuous DTC that sets only when the IPC loses communication with the PCM and the fault may not be present at the time of testing. This DTC can be caused by an HS-CAN circuit concern, the IPC or the PCM.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Low battery state of charge
• IPC
• PCM