A/C Refrigerant System, Troubleshooting

A/C Refrigerant System, Troubleshooting

NOTE:
- The following procedures apply to vehicles without externally regulated compressor Denso 7SEU16
- Compressor/engine applications

Requirements
- Electrical systems OK
- Vacuum hoses and control systems OK
- Air flow distribution systems OK
Correct and repair as necessary before proceeding.
If any one of the following system conditions exists, check A/C refrigerant system pressures.
- A/C does not cool (cooling has stopped completely)
- Insufficient cooling during all driving speeds or engine speeds (RPM)
- No cooling or insufficient cooling after a period of driving