DTC Troubleshooting: R

DTC indicator R: An Open in the A/C Pressure Sensor Circuit

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

1. Disconnect climate control unit connector B (16P).

1. Check for continuity between the No. 9 terminal of climate control unit connector B (16P) and the No. 2 terminal of the A/C pressure sensor 3P connector.

Is there continuity?

YES | - | Go to Step 4 .
NO | - | Repair open in the wire between the climate control unit and the A/C pressure sensor.■

1. Reconnect climate control unit connector B (16P).

1. Turn the ignition switch ON (II).

1. Measure the voltage between the No. 1 and No. 3 terminals of the A/C pressure sensor 3P connector.There should be 5 V.

Is the voltage as specification?

YES | - | Replace the A/C pressure sensor.■
NO | - | Go to Step 7 .

1. Turn the ignition switch OFF.

1. Disconnect climate control unit connector A (22P).

1. Check for continuity between the following terminals of climate control unit connector A (22P) and the A/C pressure sensor 3P connector.

   22P: | 3P:
   --- | ---
   No. 15 | No. 3
   No. 20 | No. 1

Is there continuity?

YES | - | Check for loose wires or poor connections at climate control unit connector A (22P) and at the A/C pressure sensor 3P connector. If the connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■
NO | - | Repair any open in the wire(s) between the climate control unit and the A/C pressure sensor.■