Aviator AWD V8-4.6L DOHC VIN H (2003)
Test P10-P12
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 will not be possible. Check
circuit 70 (LB/WH) between the parking aid module, RCM and the DLC C251. Total resistance values 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 C212 or C408. 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 run with the module in question disconnected. If the data links
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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circuit 70 (LB/WH) shorted to ground or open
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in-line C212
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in-line C408
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DLC C251
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parking aid module
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RCM
Test Q
PINPOINT TEST Q: NO UART BASED PROTOCOL (UBP) NETWORK COMMUNICATION
