03 - Inspection Procedure

When The A/C is Operating, Temperature inside the Passenger Compartment does not Decrease (Cool Air is not Emitted).

DIAGNOSIS

STEP 1. Check for refrigerant leaks.

Q: Is the refrigerant leaking?

YES: Repair. Then go to Step 5.

NO: Go to Step 2.







STEP 2. Check the dual pressure switch operation.
1. Remove the dual pressure switch connector and connect the high/low pressure side terminals located on the harness side as shown in the illustration.
2. Install a gauge manifold to the high-pressure side service valve of the refrigerant line.
3. When the high/low pressure sides of the dual pressure switch are at operation pressure (ON) and there is continuity between the respective terminals.

Q: When the high/low pressure sides of the dual pressure switch are at operation pressure (ON), is there continuity between the respective terminals?

YES: Go to Step 3.

NO: Replace the switch. Then go to Step 5.

STEP 3. Measure the automatic compressor controller terminal voltage.

Q: Is the automatic compressor controller terminal voltage correct?

YES: Go to Step 4.

NO: Replace. Then go to Step 5.

STEP 4. Measure the powertrain control module terminal voltage.
Refer to Computers and Control Systems/Testing, Diagnosis - Check at the Powertrain Control Module (PCM).

Q: Is the voltage correct?

YES: Go to Step 5.

NO: Replace. Then go to Step 5.

STEP 5. Check symptoms.

Q: Does the system produce cool air?

YES: This diagnosis is complete. (If no malfunctions are not found in all steps, an intermittent malfunction is suspected. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction.)

NO: Go to Step 1.