Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

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
- Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR PROPER COOLING FAN OPERATION
NOTE:
Visually inspect the condenser for any debris which may be blocking air flow before proceeding.

Start the vehicle and turn the A/C on.

Are the cooling fans operating properly?

Yes
- Go To 3
No
- Using the appropriate SYSTEM WIRING DIAGRAMS as a guide, diagnose and repair the cooling fan system.
- Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to HYBRID CONTROL PROCESSOR (HCP) VERIFICATION TEST .
CHECK FOR PROPER A/C PRESSURES AND HIGH PRESSURE SENSOR READING
1. Connect an approved A/C recovery machine to the A/C system or A/C pressure gauges.
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 for restrictions in the A/C system.
  - Check Evaporator for icing.
  - Replace the A/C pressure sensor in accordance with the Service Information.
  - Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to HYBRID CONTROL PROCESSOR (HCP) VERIFICATION TEST .
CHECK FOR INSUFFICIENT BLOWER MOTOR AIR FLOW
1. Start the vehicle and turn the A/C on.
2. Turn the blower motor on different blower speeds and check for proper air flow coming out of the panel vents.
  Is there adequate blower air flow coming out of the panel vents?
  
  Yes
  - Go To 5
  No
  - Using the appropriate SYSTEM WIRING DIAGRAMS as a guide, diagnose and repair the blower motor operation if the blower motor is inoperative.
  - Check for restrictions in the HVAC housing.
  - Check for damage to the blower motor squirrel cage.
  - Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to HYBRID CONTROL PROCESSOR (HCP) VERIFICATION TEST .
ELECTRIC A/C COMPRESSOR (EAC)
1. Reconnect any previously disconnected wire harness connections and prepare the vehicle for power up.
2. Turn the ignition on, not in ready mode.
3. Using the scan tool, record current DTCs and environmental data and erase HCP DTCs.
4. Turn the ignition off. Wait one minute.
5. Turn the ignition on. Wait one minute.
6. Using the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Replace the EAC in accordance of the Service Information.
    Refer to COMPRESSOR, A/C, REMOVAL AND INSTALLATION .
  - Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to HYBRID CONTROL PROCESSOR (HCP) VERIFICATION TEST .
  No
  - Repair is complete.
  - Perform the Hybrid Control Processor (HCP) VERIFICATION TEST. Refer to HYBRID CONTROL PROCESSOR (HCP) VERIFICATION TEST .