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Home >> Ford >> 2003 >> Excursion 6.0 P, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1663 (Anti-Theft System) >> Diagnostic Tests >> Anti-Theft >> Pinpoint Tests >> Pinpoint Test E: DTC B1681 - PATS Transceiver Module Signal Is Not Received >> Normal Operation
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Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The passive anti-theft system (PATS) transceiver receives voltage from the central junction box (CJB) fuse 28 (5A) on circuit 1266 (RD/YE) and is grounded on circuit 875 (BK/LB). The PATS transceiver and the powertrain control module (PCM) communicate on circuits 1215 (WH/LG) and 1216 (GY/OG). The PCM compares the key code stored in memory and enables the starter if the key code is correct.

DTC B1681 - sets when the PATS transceiver signal is not received by the PCM. This DTC can be caused by circuits to the PATS transceiver, circuits between the PATS transceiver and the PCM, the PATS transceiver or the PCM. This can also be caused by using the incorrect PATS transceiver part number.

Possible Causes

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