Checking Connectors

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.

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Corrective action to the passenger compartment temperature sensor and control module connectors for contact resistance and oxidation according to Contact Resistance And Oxidation .
Check carefully for signs of damage etc.
To remove the control module, refer to Replacing ECC Control Module .
To access the passenger compartment temperature sensor, refer to Replacing Passenger Compartment Temperature Sensor (ECC) .
Reinstall components, reconnect connectors etc. Leave the temperature sensor loose but connected to the system.
Ignition on.
Start blower fan.
Check that fan motor in the temperature sensor is operating.

If blower fan motor is now OK this indicates that the fault was caused by poor contact in the connectors.

Fig 3: Identifying Blower Fan Control Switch
Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the fan motor working?

YES
OKAY: Troubleshooting has been completed.
NO
Refer to Checking Components And Cables