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 outside temperature sensor resistance. For resistance values, see Component Resistance Values .
Check cable between control module #4 and outer temperature sensor terminal 2 for an open-circuit according to Open-Circuit, Permanent Faults .
Check cable between control module #7 and outer temperature sensor terminal 1 for an open-circuit according to Open-Circuit, Permanent Faults and for a short-circuit to supply voltage according to Short-Circuit To Supply Voltage. Permanent Faults
NOTE:
In the event of a fault in the ground lead, diagnostic trouble code (DTC) HEA-801 Coolant temperature sensor may also be stored.
Remedy as necessary.
Other information:
- To access the control module/connect breakout box, see Connecting the Breakout Box .
- To access/replace the outside temperature sensor, see Replacing Outside Temperature Sensor And Glow Plugs .
- With ignition on and outside temperature sensor connector disconnected, the voltage between outside temperature sensor connector terminal 1 (control module side) and ground should be approximately 5 V.
- With ignition of and outside temperature sensor connector disconnected the resistance between outside temperature sensor connector terminal 2 (control module side) and ground should be approximately 0 Ω.
- For other values, see Signal Specification Additional Heater 912-D/B .
- Continue
Refer to Verification