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Test D: The Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool

PINPOINT TEST D: THE RESTRAINT CONTROL MODULE (RCM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL


D1-D2:






D2-D3:






Normal Operation
The RCM communicates with the diagnostic tool through the high speed controller area network (CAN), circuits VDB04 (WH/BU) and VDB05 (WH).

Check the high speed CAN circuits VDB04 (WH/BU) and VDB05 (WH) between the RCM C310b and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC C251, damage to the RCM C310b, or a problem in an in-line connector.

Possible Causes
- high speed CAN data plus circuit VDB04 (WH/BU) open
- high speed CAN data minus circuit VDB05 (WH) open
- RCM C310b
- RCM
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