Cooling Insufficient - A/C System

Due to its variable displacement feature, special caution is necessary when diagnosing insufficient cooling conditions with the V-5 compressor. It is normal for liquid refrigerant to collect in the compressor crankcase during extended periods of shutdown, therefore, cooling action may be delayed up to 2 minutes until the refrigerant is pumped from the compressor crankcase.

Perform the following procedure if there is a delay in cooling upon start-up beyond 2 minutes, and the normal service manual operating procedure for the A/C compressor clutch and the electrical engine cooling fan operation has been accomplished:
1. Select the NORM A/C position.
2. Select the high blower position.
3. Ensure that the A/C compressor clutch is engaged.
4. Ensure that the electrical engine is operating.
5. Ensure that the A/C is operating.
6. Idle the engine for 2 minutes.
7. Perform the following procedure if there is no cooling:
7.1. Operate the engine at approximately 3000 rotations per minute (RPM) for 1 minute.
7.2. Ensure that the engine is idling.
7.3. Select the mode control to the VENT position for 1 minute.
8. Set the A/C system back to NORM A/C mode.
9. Ensure that the A/C system is operating.
10. Run the engine at approximately 3,000 RPM for 1 minute.
11. Perform the following procedure if there is no cooling:
11.1. Ensure that the A/C system is operating.
11.2. Drive the vehicle in a normal manner for 5 minutes.
11.3. Inspect the A/C system for normal operation. If there is no cooling, refer to:
VDOT A/C System Diagnosis (Preliminary Checks)
- Preliminary Checks - VDOT A/C System or
VDOT A/C System Diagnosis (Checking Refrigerant Charge)
Checking Refrigerant Charge - VDOT A/C System or
VDOT A/C System Diagnosis (Checking Compressor Clutch Engagement)
Checking Compressor Clutch Engagement - VDOT A/C System or
VDOT A/C System Diagnosis (Checking System Performance)
Checking System Performance - VDOT A/C System or
VDOT A/C System Diagnosis (Control Valve Diagnosis).
Control Valve Diagnosis - VDOT A/C System