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Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN 
    WARNING:

    On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury.

    Read the HIGH-VOLTAGE SAFETY PROCEDURES. Refer to  HIGH VOLTAGE SAFETY PROCEDURES  . 

    When the HIGH-VOLTAGE POWER-DOWN PROCEDURE is necessary. Refer to  HIGH VOLTAGE POWER DOWN  . 

    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR PROPER COOLING FAN OPERATION 
    1. Start the vehicle and turn the A/C on.
      NOTE:

      Visually inspect the Condenser and Radiator for an debris which may be blocking air flow before proceeding.

      Are the cooling fans operating properly?

      Yes 

      • Go To  3

      No 

      • Using the wiring diagrams as a guide, diagnose and repair the cooling fan system.
      • Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK FOR PROPER A/C PRESSURES AND HIGH PRESSURE SENSOR READING 
    1. Connect an approved A/C recovery machine to the A/C system.
    2. Start the vehicle and turn the A/C on.
    3. Check the A/C High and Low pressure gauges on the recovery machine.
    4. With the scan tool, check the A/C pressure sensor reading in the HCP and compare the A/C pressure reading to the A/C pressure gauge.

      Are the A/C pressures correct and not abnormally high or the A/C pressure sensor reading correctly?

      Yes 

      • Go To  4

      No 

      • Correct the cause of the high A/C pressure.
      • Check Evaporator for icing or debris.
      • Replace the A/C pressure sensor in accordance with the Service Information.
      • Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK FOR PROPER REFRIGERANT CHARGE 
    1. Check the A/C system state of charge.

      Is the A/C system undercharged?

      Yes 

      • Charge the A/C system with the proper amount of Freon in accordance with the Service Information.
      • Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Test complete, end of diagnostic test.
      • Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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