Other Engine Control Modules (ECM)

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.

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition on.
Read off engine coolant temperature (ECT).
Check the engine coolant temperature (ECT) reading is correct. Compare with the actual coolant temperature of the engine.

HINT: To obtain the engine temperature, read off engine coolant temperature (ECT) from the engine control module (ECM).

Fig 2: Identifying VCT2000
Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the temperature reading OK?

YES
Refer to Intermittent Fault
NO
Refer to Checking Connectors