Checking the connectors and wiring

Check the signal cable between the climate control module (CCM) and the evaporator temperature sensor. Check for a short-circuit to supply voltage.

Take a reading on the connector for the climate control module (CCM) between terminals #5 (#29) and #16 (#40).

Check the ground lead between the climate control module (CCM) and the evaporator temperature sensor. Check for a short-circuit to supply voltage.

Take a reading on the connector for the climate control module (CCM) between terminals #13 (#37) and #16 (#40).

The voltage must be approximately 0 V.

Check the signal and ground cables between the climate control module (CCM) and the evaporator temperature sensor. Check for an intermittent open-circuit.

Take a reading between terminals #5 (#29) and #13 (#37) on the connector for the climate control module (CCM).

Check the connectors for contact resistance and oxidation.

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 Checking wiring and terminals

Fig 2: Connector, Green (16- Pin)

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Evaporator Temperature Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information