Diagnostic Trouble Code (DTC) Information TCM-0A30

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Condition

Fig 1: Identifying Engine Control Module (ECM)

Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM) transmits a signal on engine speed on the CAN network. The transmission control module (TCM) uses the signal to check the lock-up function.

The diagnostic trouble code (DTC) is stored if the control module detects that:

There is no speed (RPM) signal from the engine control module (ECM) or the signal is faulty.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

Ignition on and CAN network OK.

Substitute Value

Auxiliary program Emergency mode 1 in the transmission control module (TCM) has started.
HINT: EMERGENCY MODE IN THE EVENT OF A FAULT
Neutral control function is blocked.
Lock-up function is blocked.

Possible Source

Fault-trace the central electronic module (CEM).
Locate the cause of the fault in the engine control module (ECM).
Intermittent open circuit or short-circuit on the CAN lead between the engine control module (ECM) and the transmission control module (TCM).

Fault symptom[s]

General warning lamp lit
Rough gear shift
No gear shift
No lock-up