( TL19E00G10110112012FAAT00 )

A/C Compressor Clutch Circuit Troubleshooting

NOTE:

- It is normal for the A/C compressor to turn off under certain conditions, such as low idle, high engine coolant temperature, hard acceleration, or high/low pressure.
- Do not use this troubleshooting procedure if the fans are also inoperative with the A/C on. Refer to the symptom troubleshooting index.
- Before doing any symptom troubleshooting, check for powertrain DTCs, R20A3 engine model, K24Z3 engine model.

1. Check the No. 20 (7.5 A) fuse in the under-hood fuse/relay box, and the No. 16 (7.5 A) fuse in the driver's under-dash fuse/relay box.

Are the fuses OK?

YES | - | Go to Step 2 .
NO | - | Replace the fuse(s) and recheck. If the fuse(s) blow again, check for a short in the No. 20 (7.5 A) fuse and the No. 16 (7.5 A) fuse circuits.■

1. Connect the HDS to the DLC.

1. Check for these PGM-FI DTCs: P0117, P0118, P0506, P0507, P0532, and P0533.

Are any of these DTCs indicated?

YES | - | Go to the appropriate troubleshooting section.
NO | - | Go to Step 4 .

1. Start the engine, then turn on the A/C.

1. Check the A/C CLUTCH in the PGM-FI Data List with the HDS.

Is the A/C CLUTCH on?

YES | - | Go to Step 7 .
NO | - | Go to Step 6 .

1. Using the HDS, confirm the following values in the PGM-FI Data List at idle.

   TP SENSOR | About 0.5 V
   RPM | R20A3 engine model (A/T) | 600−700
   R20A3 engine model (M/T) | 630−730
   K24Z3 engine model (A/T) | 750−850
   K24Z3 engine model (M/T) | 700−800
   ECT SENSOR 2 | 80−100 °C (176−212 °F)
   A/C SWITCH | ON
   A/C CLUTCH | ON
   A/C PRESSURE SENSOR | 196−3,138 kPa (2−32 kgf/cm 3 ) [28−455 psi]

Are all the values within specifications?

YES | - | Go to Step 7 .
NO | - | Troubleshoot the value that is not within the specifications.■

1. Remove the A/C compressor clutch relay from the under-hood fuse/relay box, and test it.

Is the relay OK?

YES | - | Go to Step 8 .
NO | - | Replace the A/C compressor clutch relay .■

1. Measure the voltage between the A/C compressor clutch relay 4P socket No. 1 terminal and body ground.

Is there battery voltage?

YES | - | Go to Step 9 .
NO | - | Replace the under-hood fuse/relay box. ■