VOLVO
TCM-0070 - Function, immobilizer. Signal missing
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (15)
- Volvo C30 (2007–2013)2007–2013Transmission AW55-50/51SN only
- Volvo C70 (2006–2013)2006–2013Transmission AW55-50/51SN only
- Volvo S40 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo S40 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo S60 (2001–2009)2006–2007Engine B5254T4, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo S60 (2001–2009)2008–2009Engine D5244T4, D5244T5 only · Transmission TF-80SC only
- Volvo V50 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo V50 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V70 (2000–2008)2006–2007Engine B5254T4, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo V70 (2000–2008)2008Engine D5244T5 only · Transmission TF-80SC only
- Volvo V70 XC / XC70 (2001–2007)2006–2007Engine D5244T4 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2006–2007Engine D5244T4 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2008–2010Engine D5244T4, D5244T5 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2011Engine D5244T18, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo XC90 (2003–)2012All engines except: B5254T2, B6324S5 · All transmissions except: AW50/51 AWD
What does this fault code mean?
The start inhibitor makes sure the engine can only be started with the gear selector in position P or N. The transmission control module sends a signal to the engine control module that tells it starting is allowed when the signal is grounded. The fault means the signal cannot be grounded, so the engine control module is not given permission to start the engine.
Possible causes
- The signal cable is short-circuited to voltage
- Internal fault inside the transmission control unit (TCM)
What you can do
- 1Read off the fault code, clear it and check whether it comes back
- 2Have a diagnostic tool? Read the start inhibitor status with the brake pressed while moving the selector; it should show start permitted only in P and N
- 3Use a multimeter to check that the cable between the transmission control module and the engine control module has no short circuit to voltage
- 4Have a workshop check the connections and put right the fault as needed
Symptoms you may notice1
- The engine does not start
General guidance for car owners. Diagnosis on the car can point to a different cause.