ECM-P256702: Direct Ozone Reduction Catalyst Temperature Sensor Circuit. General Failure Information. General Signal Failure (B6324S2; 2010): Fault-Tracing: Verification

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

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

• Engine idling.
• Activate the test by pressing on the symbol for VCT2000.

  The radiator and radiator temperature sensor can be checked by performing a quick-test.

  NOTE: The climate unit shall be off during the whole test. Engine shall be idling during the entire test. Changes of these conditions cancel the test.

  The test consists of: 

  • Warm-up phase.

    The engine temperature shall increase slowly and stabile above 90 °C. At the same time, the radiator temperature increases to above 80 °C.

  • Measuring phase.

    The electric cooling fan will automatically be activated at high speed. Temperature changes of engine temperature and radiator temperature are monitored.

  • Evaluation phase.

    Measuring values are evaluated and compared to expected values.

  A report is generated after finished test. A print-out of the report shall be attached in case of any component change.

  NOTE: Check Volvo's rules for warranty and spare parts handling for this component. Make sure that relevant procedures are followed.
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

• FAULT FOUND 

  OKAY:  Troubleshooting has been completed.

• FAULT NOT FOUND 

  Refer to INFORMATION