Resetting the Overheat Protection Thermostat

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 OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.

Fig 2: Identifying Control Module Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.
- Remove the rubber plug. Reset the overheat protection thermostat by pressing the knob down
- Connect an ohmmeter between terminal 4 (green cable) and terminal 1 (yellow/black cable) on the control module 8-pin connector.
Fig 4: Resetting Overheat Protection Thermostat By Pressing Knob Down
Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read a maximum of 150 Ω (normal value 5-20 Ω).

OK
Refer to Checking the Coolant
NOT OK
Refer to Checking the Overheat Protection Thermostat .