Diagnostic Aids

If a poor A/C cooling condition exists, check for low A/C refrigerant charge, Diagnostic Trouble Code (DTC) 66 or 70 set, or faulty secondary cooling fan.

Fig 1: Chart C-12 Schematic (3.1L VIN M) Cooling Fan Circuit Diagnosis

Fig 2: Chart C-12 Flow Chart (3.1L VIN M - 2 Of 2) Cooling Fan Circuit Diagnosis