Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying ECM, Instrument Panel And Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) CI-07 is stored in the combined instrument panel if the tachometer receives a signal corresponding to more than 8000 RPM for over 1 second.

Substitute Value 

None.

Possible Source 

• defective engine control module (ECM)
• defective combined instrument panel
• defective ignition sensor. Diagnostic trouble codes (DTCs) are stored in the engine management system if there is a fault in the ignition sensor. These diagnostic trouble codes (DTCs) must be fault-traced first.
  NOTE: In cars with the Melco 2 engine management system, the engine speed (RPM) signal comes directly from the ignition sensor in the engine management system.

Fault symptom[s] 

• the tachometer does not function.