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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1122 (Anti-Theft System - Pats - (Hybrid)) >> Diagnostic Tests >> Anti-Theft - Passive Anti-Theft System (PATS) >> Pinpoint Tests >> Pinpoint Test G: DTC B1681 - Passive Anti-Theft System (PATS) Transceiver Signal Is Not Received (Not Connected, Damaged, Or Damaged Wiring) >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The PATS transceiver receives voltage from smart junction box (SJB) fuse 5 (2A) on circuit 296 (WH/VT) and is grounded on circuit 570 (BK/WH). The PATS transceiver and the powertrain control module (PCM) communicate on circuits 167 (BN/OG) and 168 (RD/BK). The PCM compares the key code stored in memory and sends a controller area network (CAN) signal to the transmission control module (TCM) to start the vehicle 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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