B2980

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. Operate the climate control system in several modes.
3. Check for DTCs using the HDS or self-diagnostic

Is DTC B2980 or PRE sensor short indicated?

YES - Go to step 4.

NO - Intermittent failure.

4. Turn the ignition switch OFF.
5. Disconnect the A/C pressure sensor 3P connector.
6. Disconnect the climate control unit 40P connector.




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

Is there continuity?

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

NO - Go to step 8.




8. Check for continuity between the terminals of the climate control unit 40P connector.

Is there continuity between any of the terminals?

YES - Repair the short in the wires.

NO - Go to step 9.

9. 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.

NO - Repair the A/C pressure problem.