Refrigerant Pressure RX Failure (Active)

REFRIGERANT PRESSURE RX FAILURE (ACTIVE)

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on.

- Set Condition:
This DTC will set if the A/C - Heater Control Module does not receive the Refrigerant Pressure message from the PCM for more than 20 seconds.





Diagnostic Test

1. CHECK FOR ADDITIONAL HVAC DTCS
Turn the ignition on.
With the scan tool, read HVAC DTCs.
Does the scan tool display additional HVAC DTCs?

Yes

- Diagnose and repair the DTC(s).
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To2

2. CHECK FOR PCM DTCS
Turn the ignition on.
With the scan tool, check the PCM for any DTCs.
Are any DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To3

3. A/C HEATER CONTROL MODULE
Turn the ignition on.
With the scan tool in HVAC, Monitor Display, PCI Bus Msgs, look for the following messages and their displayed values ("A/C Hi Side Press: XX," "VIN Msg Pres: YES").
Does the scan tool display NO RESPONSE after the message?

Yes

- Refer to symptom *No Response From PCM (PCI Bus) in Manufacturer Trouble Codes/Communications.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the A/C - Heater Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.