VOLVO
ECM-1797 - Transmission Control Indicator Light Circuit
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo C30 (2007–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo C30 (2007–2013)2011–2013Engine B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo S40 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo S40 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2008–2009Engine B4184S11, B4184S8, B4204S3 only
- Volvo V50 (2004–2013)2010Engine B4184S11, B4184S8, B4204S3, B4204S4 only
- Volvo V50 (2004–2013)2011–2012Engine B4204S3, B4204S4 only
What does this fault code mean?
The ECM tracks the clutch pedal through two sensors: a position sensor that sends its signal over the car's CAN data link, and a position switch wired directly to the ECM. If the position sensor shows the pedal pressed while the switch is not active, fault code ECM-1797 is set.
Possible causes
- Position switch incorrectly fitted, adjusted or sticking
- Contact resistance, oxidation or poor contact in the connector
- Faulty position switch
What you can do
- 1Check that the clutch pedal moves freely up and down without sticking or obstruction
- 2Switch off the ignition and check the clutch position switch connector for play, contact resistance and oxidation
- 3If you have a diagnostic tool: check in live data how the clutch pedal position and the switch status change when the pedal is pressed and released
- 4If the fault remains, have a workshop adjust or replace the position switch
Symptoms you may notice3
- Auto start does not work
- Cruise control cannot be engaged
- Warning symbol and a text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.