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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 33 (Hybrid Control Processor Module (HCP) - DTCS P25BA-00 To U0121-00) >> DTC Troubleshooting >> P26FD-00 A/C Compressor Internal Control Module Performance >> Diagnostic Test

Diagnostic Test

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

CHECK FOR AN ACTIVE DTC 

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 Hybrid Control Processor (HCP) DTCs and record on the repair order.
  2. Record the Freeze Frame Data (If available), Event Data (If available), and Environmental Data.
  3. With the scan tool, erase DTCs.
  4. Using the recorded data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
  5. With the scan tool, read HCP DTCs.

    Did the DTC return?

    Yes 

    No