Checking Wiring And Terminals

NOTE: If diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM) or the steering wheel module (SWM), fault trace these first.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

Ignition off.
Check the brake control module (BCM) connector. Check for damaged or bent terminal pins. Check for contact resistance. Check for oxidation.

Check the wiring for CAN communication. Check between the brake control module (BCM) terminal #11 (#A11) and terminal #8 (#A8) on the steering wheel module (SWM). Check between the brake control module (BCM) terminal #15 (#A15) and terminal #9 (#A9) on the steering wheel module (SWM). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Check that the wiring is not too close to a source of interference such as a carphone etc.

Remedy as necessary.

Other information
- To connect the breakout box, brake control module (BCM), see CONNECTING THE BREAKOUT BOX
- To connect the breakout box, steering wheel module (SWM), see CONNECTING THE BREAKOUT BOX
- see CONTENTS