F 150 4WD Pickup V8-4.6L VIN W (2006)
J7
Normal Operation
The reverse parking aid module and the restraint control module (RCM) communicate with the diagnostic tool through the ISO 9141 communications
network circuit 70 (LB/WH). If circuit 70 (LB/WH) becomes open or shorted to ground, communications to that module are not possible.
Check circuit 70 (LB/WH) between the parking aid module, RCM and the data link connector (DLC) C251. The total resistance value must not be
more than 5 ohms. If the resistance is more than 5 ohms there is an open in circuit 70 (LB/WH), damage to the DLC C251, damage to the parking aid
module, RCM or a problem in one of the in-line connectors.
If, after individual checks of each circuit leading to a module show resistance values less than 5 ohms and no in-line connector issues present, the data
link diagnostics test must be ran with the module in question disconnected. If the data link diagnostics test passes with the module in question
disconnected it is the source of the concern and should be removed and a new module installed.
Possible Causes
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ISO 9141 circuit 70 (LB/WH) short to voltage, short to ground, or open
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DLC C251
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parking aid module C2023
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parking aid module
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RCM C310a
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RCM
Test K: No Universal Asynchronous Receiver Transmitter (UART)-Based Protocol (UBP)
Communications Network Communication
PINPOINT TEST K: NO UNIVERSAL ASYNCHRONOUS RECEIVER TRANSMITTER (UART)-BASED PROTOCOL (UBP)
COMMUNICATIONS NETWORK COMMUNICATION
K1
