
2003 Ford Expedition, ECM/Inputs/Outputs Waveform
![]() ![]() This screen capture is of the PATS circuits Tx (channel B at top) and Rx (channel A). At the time of the screen capture the engine would not crank and the Security light was flashing once per second. Code B1681 “Pats Transceiver Module Signal Not Received” wou...
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Engine | 5.4 L / 8 cyl / GAS |
Trans | 4-speed AutomaticTransmission (Electronic) |
Delivery | Fuel Injection |
Subsystem | ECM/Inputs/Outputs |
Component | Other |
Condition | Known Bad |
Vehicle Data
2003 Ford Expedition Eddie Bauer 5.4L
Engine | 5.4 L / 8 cyl / GAS |
Trans | 4-speed AutomaticTransmission (Electronic) |
Delivery | Fuel Injection |
Subsystem | ECM/Inputs/Outputs |
Component | Other |
Condition | Known Bad |