CPM-U300049: Control Module. System Internal Failures. Internal Electronic Failure (2007-2012): Fault-Tracing: Verification

HINT: After carrying out the repair, check that the fault has been remedied. 

Fig 1: Identifying Ignition ON

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Fig 2: Identifying Connector(s) Reinstallation

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• Ignition off.
• Restore components and connectors.
• Start the engine.
• Click the VCT2000 symbol in VIDA (Volvo scan tool) to start activation. It takes approximately 180 seconds to carry out test.

  This function checks both the heaters electrical and mechanical components and test runs the heater. In order for the test to start, the heater must not detect any flame, battery voltage must be over 10.25 V at 20 A consumption, the engine must be idling and the fuel lines must be full.

  NOTE:

  Additional/parking heater not permitted to start, if the coolant's temperature is too high. The parking heater does not start if the temperature exceeds +65 °C till +75 °C. The exact temperature parameter depends on the software version. The additional heater does not start if the temperature exceeds approximately +75 °C. If the coolant is too warm, it can be cooled fast with the function Cooling of cooling system  for Combustion preheater module (CPM).

  A buzzing sound must come from the heater. The heater must now start and run.

  HINT: If the control module detects a fault during the test, the diagnostic trouble code (DTC) is stored for the relevant component/function. 

  NOTE:

  The test cannot be started when the engine coolant heater run-on is active. Wait until run-on has finished.

  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

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  Fig 4: Identifying Booster Heater

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Is the heater function OK? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to INFORMATION