VOLVO
TCM-0036 - Winter mode selector switch. Signal too low
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (1996–2004), V40 (1996–2004)
Show models by year and engine (2)
What does this fault code mean?
The control module registers that the signal from the winter mode selector is too low. The signal is grounded when the W button is pressed and tells the control module to switch shift program, so winter mode does not work as it should.
Possible causes
- Signal wire short-circuited to ground
- Defective mode selector
- The winter (W) button has been held pressed for several minutes
What you can do
- 1If you have a diagnostic tool: check in live data that the W button shows OFF when it is not pressed and ON when it is pressed
- 2Check that the winter (W) button does not stick or stay in the pressed position, and shake the mode selector to see whether any parts are loose in the connector
- 3Clear the fault code and check whether it returns
- 4If the fault remains, have a workshop remove the mode selector and check the wire to ground, and replace the selector if it is defective
Symptoms you may notice1
- Winter mode does not work
What the fault can affect1
- The control module uses no substitute values for winter mode
General guidance for car owners. Diagnosis on the car can point to a different cause.