Checking Cables

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Check the control module and power unit connectors for contact resistance and oxidation according to Contact Resistance And Oxidation .

Check cable between control module #A14 and power unit for a short-circuit to ground according to Short-Circuit To Ground, Permanent Faults .

Check power supply to power unit #A4 for an open-circuit according to Open-Circuit, Permanent Faults .

Check ground lead between power unit #B2 and ground terminal for an open-circuit according to Open-Circuit, Permanent Faults .

Remedy as necessary.

Other information:

To remove the control module, refer to Replacing ECC control module .
To access the power unit, refer to Replacing the power unit (Electronic climate control) .

Fig 1: Identifying 4-Pin Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Climate Control Module Connectors Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying 1B And 2B Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

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Refer to Verification