COMP Solenoid Error

HVAC DTC Troubleshooting: COMP solenoid error

COMP Solenoid error is indicated:

A Problem in the Variable Capacity Control Solenoid Valve Circuit

1. Clear the DTC by turning the ignition switch to LOCK (0), and then back to ON (II).

2. Start the engine, and turn on the A/C.

3. Measure the voltage of the battery.

Is there 11.5 V or more?

YES -

Go to step 4.

NO -

Check the battery condition Testing and Inspection and the charging system Alternator and Regulator Circuit Troubleshooting. Correct any problems and recheck.�

4. Turn off the A/C, and stop the engine.

5. Clear the DTC by turning the ignition switch to LOCK (0), and then back to ON (II).

6. Operate the climate control system in several modes.

7. Check for DTCs using the self-diagnostic.

Is DTC COMP solenoid error indicated?

YES -

Go to step 8.

NO -

Intermittent failure, check for loose wires or poor connections on the variable capacity control solenoid valve circuit.�

8. Turn the ignition switch to LOCK (0).

9. Disconnect the climate control unit 40P connector.

10. Measure the resistance between climate control unit 40P connector terminals No. 3 and No. 4.





Is there about 5.2 Ohms?

YES -

Go to step 11.

NO -

Go to step 14.

11. Check for continuity between body ground and climate control unit 40P connector terminals No. 3 and No. 4 individually.





Is there continuity?

YES -

Go to step 12.

NO -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit Climate Control Unit Removal/Installation.�

12. Disconnect the A/C compressor clutch 3P connector.

13. Check for continuity between body ground and climate control unit 40P connector terminals No. 3 and No. 4 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the climate control unit and the variable capacity control solenoid valve.�

NO -

The variable capacity control solenoid valve is faulty, replace the A/C compressor Service and Repair.�

14. Disconnect the A/C compressor clutch 3P connector.

15. Check for continuity between climate control unit 40P connector terminals No. 3 and No. 4.





Is there continuity?

YES -

Repair a short in the wires between the climate control unit and the variable capacity control solenoid valve.�

NO -

Go to step 16.

16. Check for continuity between the following terminals of the climate control unit 40P connector and the A/C compressor clutch 3P connector.









Is there continuity?

YES -

The variable capacity control solenoid valve is faulty, replace the A/C compressor Service and Repair.�

NO -

Repair an open in the wire(s) between the climate control unit and the variable capacity control solenoid valve.�