Heating & A/C

9002-REFRIGERANT PRESSURE SENSOR CIRCUIT HIGH





For a complete wiring diagram Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Whenever the HVAC Module is awake.

- Set Condition:
When the Refrigerant Pressure Sensor circuit is shorted to voltage.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase all HVAC DTC's.
3. Change the temperature on the HVAC control head
4. Wait 30 seconds.
5. With the scan tool, read all HVAC DTC's.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

2. REFRIGERANT PRESSURE SENSOR CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the HVAC module harness connectors.
3. Disconnect the Refrigerant Pressure Sensor harness connector.
4. Turn the ignition on.
5. Measure the voltage of the Refrigerant Pressure Sensor circuit.

Is there any voltage present?

Yes

- Repair the Refrigerant Pressure Sensor circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go to 3

3. REFRIGERANT PRESSURE SENSOR CIRCUIT OPEN
1. Turn the ignition off.
2. Measure the resistance of the Refrigerant Pressure Sensor circuit.

Does the ohm meter read open circuit?

Yes

- Repair the Refrigerant Pressure Sensor circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 4

4. REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT OPEN
1. Turn the ignition off.
2. Measure the resistance of the Refrigerant Pressure Sensor Ground circuit

Does the ohm meter read open circuit?

Yes

- Repair the Refrigerant Pressure Sensor Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Replace the HVAC Module.
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests