( TL19E00G10100012101FAAT00 )

A/C Signal Circuit Troubleshooting

NOTE:

- If the blower motor does not run at all speeds, the A/C compressor will be inoperative. Run the self-diagnostic function, and check the DTC B1241. Before performing any other troubleshooting, repair the cause of the inoperative blower motor.
- Do not use this troubleshooting procedure if any of the following items are operative; condenser fan, radiator fan, A/C compressor, or if the heater is inoperative. Refer to the symptom troubleshooting index.
- Before doing symptom troubleshooting, check for powertrain DTCs, R20A3 engine model, K24Z3 engine model. Also check for B-CAN codes.

1. Turn the ignition switch to ON (II).

1. Check if the blower motor operates at all speeds.

Does the blower motor operate at all speeds?

YES | - | Go to Step 3 .
NO | - | Repair the problem in the blower motor circuit.■

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

1. Disconnect climate control unit connector A (28P).

1. Turn the ignition switch to ON (II).

1. Measure the voltage between climate control unit connector A (28P) No. 21 terminal and body ground.

Is there battery voltage?

YES | - | Go to Step 7 .
NO | - | Go to Step 8 .