Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2006NAVIGATOR 4WD V8-5.4L VIN 5REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSTEST E: DTC B1681 - THE PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER SIGNAL IS NOT RECEIVED
2006 Lincoln Navigator 4WD V8-5.4L VIN 5
Test E: DTC B1681 - The Passive Anti-Theft System (PATS) Transceiver Signal Is Not Received
2006 Lincoln Navigator 4WD V8-5.4L VIN 5SECTION Test E: DTC B1681 - The Passive Anti-Theft System (PATS) Transceiver Signal Is Not Received
PINPOINT TEST E: DTC B1681 - THE PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER SIGNAL IS NOT RECEIVED
Normal Operation
The PATS transceiver receives voltage on circuit 1044 (WH/YE) and ground on circuit 875 (BK/LB). The PATS transceiver communicates with the PATS key. During each vehicle start sequence, the PATS transceiver reads the PATS key identification code and sends the data to the powertrain control module (PCM). The PCM and the PATS transceiver communicate on circuits circuit 1215 (WH/LG) and 1216 (GY/OG). The control functions are contained in the PCM. The PCM carries out all of the PATS functions such as receiving the identification code from the PATS key and controlling engine enable. The PCM initiates the key interrogation sequence when the key is turned to the ON or START position.
Possible Causes
- circuit 875 (BK/LB) open
- circuit 1044 (WH/YE) open
- circuit 1215 (WH/LG) open short to voltage
- circuit 1216 (GY/OG) open or short to ground
- encoded ignition key
- PATS transceiver
- PCM
E1-E2:
E3-E5:
E5-E7:
E7-E9:
E9-E11:
E11-E13:
Normal Operation
The PATS transceiver receives voltage on circuit 1044 (WH/YE) and ground on circuit 875 (BK/LB). The PATS transceiver communicates with the PATS key. During each vehicle start sequence, the PATS transceiver reads the PATS key identification code and sends the data to the powertrain control module (PCM). The PCM and the PATS transceiver communicate on circuits circuit 1215 (WH/LG) and 1216 (GY/OG). The control functions are contained in the PCM. The PCM carries out all of the PATS functions such as receiving the identification code from the PATS key and controlling engine enable. The PCM initiates the key interrogation sequence when the key is turned to the ON or START position.
Possible Causes
- circuit 875 (BK/LB) open
- circuit 1044 (WH/YE) open
- circuit 1215 (WH/LG) open short to voltage
- circuit 1216 (GY/OG) open or short to ground
- encoded ignition key
- PATS transceiver
- PCM
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.