Checking Component And 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 engine coolant temperature sensor resistance. For resistance values, see Component Resistance Values .
Check cable between control module #16 and engine coolant temperature sensor signal terminal for a short-circuit to ground according to Short-Circuit To Ground, Permanent Faults .
HINT: Because it is difficult to separate the engine coolant temperature sensor ground lead from the signal cable, one must measure one cable at a time and see if the permitted values are present on either of them.
Remedy as necessary.
Other information:
- To access the control module/connect breakout box, see Connecting the Breakout Box .
- To access/replace Coolant temperature sensor, see Replacing Overheat Protection, Thermostat Flame Sensor And Coolant Temperature Sensor .
- With ignition on and the engine coolant temperature sensor signal cable cut, the voltage between the engine coolant temperature sensor signal cable (engine control module (ECM) side) and ground should be approximately 5 V.
- For other values, see Signal Specification Additional heater 912-D/B .
- Continue
Refer to Verification