Checking LIN bus 2 and connector

Check the climate control module (CCM) connector. Check for contact resistance. Check for oxidation. Check for loose connections.

Check LIN bus 2 between the climate control module (CCM), the connector for the climate control unit and the seat heating module (SHM) right. Check for an open-circuit.

Take readings between:

• The connector for climate control module (CCM) terminal #7 (#31) and the connector for climate control unit terminal #5
• The connector for the climate control module (CCM) terminal #7 (#31) and connector A for the seat heating module (SHM) right terminal #2.

Check LIN bus 2 between the components (the damper motors and the air quality sensor (AQS)) and the connector for the climate control unit. Check for an open-circuit.

Check the connector for the climate control unit. Check for contact resistance. Check for oxidation. Check for loose connections.

Remedy as necessary.

Other information: 

• See Connecting the breakout box
• See Signal specification
• See Climate control, location of components
• See Dashboard environment panel (including climate control module (CCM)), replacing
• See Seat heating module (SHM), replacing
• See Checking wiring and terminals

Fig 2: Connector, Green (16- Pin)

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Verification