Pinpoint Test 10: The Air Conditioning (A/C) Is Always On

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PINPOINT TEST 10: THE AIR CONDITIONING (A/C) IS ALWAYS ON - HYBRID

Normal Operation

Voltage is supplied to the A/C clutch cycling pressure switch through circuit (G/BR). When the A/C clutch cycling pressure switch is closed (ON), voltage is sent to the dual pressure switch through circuit (V). When the dual pressure switch is closed (ON), voltage is provided to the PCM. Ignition voltage is provided to the A/C clutch relay switch through circuit (GY/R). When A/C is requested, a message is sent over the MS-CAN bus to the PCM. When the PCM energizes the relay, ignition voltage is supplied to the A/C clutch through circuit (V/W). Ground is supplied for the A/C clutch through circuit (B/G).

Possible Causes
- Wiring, terminals or connectors
- PCM
- Dual automatic temperature control (DATC) module
- Dual pressure switch
- A/C clutch relay
- A/C clutch air gap

Diagnostic Procedure


NOTE: Before carrying out the following test, diagnose any PCM or instrument cluster DTCs.

NOTE: When disconnecting and reconnecting the pressure transducer electrical connector, make sure that the connector-locking device is in place and that the locking device and connector are correctly and fully seated.

Step 1-Step 3:

Step 4-Step 7:

Step 8: