Checking the bus cable

Fig 1: Disconnecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Disconnect the suspension module (SUM) from the bus cable. Pull the connector out of the control module.
To obtain the correct value, the battery must be disconnected during resistance readings.
Measure the resistance of the connectors across terminals #A15 and #A16.

NOTE:
Take care that you measure directly at the connector so that it is not damaged.

HINT: Only connect a breakout box to the connector, not to the control module. In this way, the direction of any faults in the bus cable can be established.

The resistance must be approximately 120 Ω. If another reading is given, there may be an open-circuit in the bus cable.

Other information
- See Connecting the breakout box
- See Signal specification
- See Battery, disconnecting
Fig 2: Breakout Box
Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the measuring instrument display a resistance of approximately 120 Ω?