B2980

DTC Troubleshooting: B2980 (PRE sensor short)

DTC B2980 or PRE sensor short is indicated:

A short in the A/C Pressure Sensor Circuit

1. Clear the DTC with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Do the self-diagnostic with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B2980 or PRE sensor short indicated?

YES -

Go to step 5.

NO -

Intermittent failure. Check for loose wires or poor connections on the A/C pressure sensor circuit.

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

6. Disconnect the A/C pressure sensor 3P connector.

7. Disconnect the climate control unit 40P connector.

8. Check for continuity between body ground and climate control unit 40P connector terminals No. 12 and No. 14 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the climate control unit and the A/C pressure sensor.

NO -

Go to step 9.

9. Check for continuity between the climate control unit 40P connector terminals as follows.





Is there continuity between any of the terminals?

YES -

Repair a short in the wires between the climate control unit and the A/C pressure sensor.

NO -

Go to step 10.

10. Check for proper A/C system pressure.

Is the pressure within specifications?

YES -

Replace the A/C pressure sensor. If the symptom/indication continues, 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.

NO -

Repair the A/C pressure problem.