Normal Operation

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The Passive Anti-Theft System (PATS) uses a visual anti-theft indicator located in the Instrument Cluster (IC). This indicator proves out for 3 seconds when the key is turned to the ON or START position under normal operation. If there is a PATS concern, this indicator either flashes rapidly or glows steadily (for more than 3 seconds) when the key is turned to the ON or START position. PATS also flashes the anti-theft indicator every 2 seconds at key off to act as a visual theft deterrent. The anti-theft indicator operation is controlled by the IC . If there is a High Speed Controller Area Network (HS-CAN) concern, the anti-theft indicator in the IC flashes and the vehicle experiences a PATS no-start.

NOTE: If DTC U2510 is present with any combination of the DTCs below, refer to DTC CHARTS and carry out the action for DTC U2510.

DTC P1602 (Immobilizer/ECM Communication Error) - sets in continuous memory when the PCM does not receive any recent communication from the PATS module. On this vehicle, the PATS function is contained in the IC . A parameter reset should resolve this DTC.
DTC U0100 (Lost Communication With ECM/PCM) - sets in continuous memory only when the IC loses communication with the PCM and the fault may not be present at the time of testing. This DTC may be caused by a HS-CAN circuit concern or by the IC or the PCM.
DTC U2511 (CAN - Data Mis-Match (Receive Data Does Not Match Expected)) - sets in continuous memory only when the IC 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 IC and this DTC is set. This DTC can be caused by the HS-CAN circuits between the IC and the PCM or by either module. This DTC can also be set if the battery voltage is low.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Low battery state of charge
IC
PCM