Mustang V6-3.8L VIN 4 (1998)
Fault Tolerance
The ISO 9141 communication link will fail if any of the following occur:
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Circuit 70 (LB/W) shorted to ground.
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Circuit 70 (LB/W) shorted to battery positive voltage (B+).
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the air bag diagnostic monitor loses power or ground supply.
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a module failure shorts the ISO 9141 communication link internally.
Purpose
The information given is designed to diagnose 1SO 9141 communication link concerns. These concerns may:
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affect normal functional operations of the vehicle.
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be directly related to customer concerns.
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be undetectable except during diagnostics.
To properly diagnose a link concern, follow the diagnostic procedure in the order presented.
Module Identification
Modules included on this ISO 9141 communication link include:
Air bag diagnostic monitor:
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located behind the instrument panel on the tunnel of the floorpan.
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if communication to the air bag diagnostic monitor fails,
Anti-lock brake control module:
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located on the lower RH radiator support.
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if communication to the Anti-lock Brake System (ABS) module fails, See: Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures
