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(2) The appropriate Powertrain Diagnostic Proce- dures Manual for diagnostic information. (3) The Compressor Clutch Diagnosis—Variable Displacement Compressor chart in this section. (4) On 2.2 L Turbo III engines, check for battery voltage at the Thermal Limiter Switch located on the If voltage is found at the cut-off and/or thermal limiter switch, reconnect switch. Then check for bat- If voltage is detected, perform A/C Clutch Coil Tests. Refer to Clutch Coil Tests in this section. CLUTCH COIL TESTS (1) Verify battery state of charge. (Test indicator in battery should be green). (2) Connect an ammeter (0-10 ampere scale) in se- ries with the clutch coil terminal. Use a volt meter (3) With A/C control in A/C mode and blower at low speed, start the engine and run at normal idle. (4) The A/C clutch should engage immediately and the clutch voltage should be within two volts of the (5) The A/C clutch coil is acceptable if the current draw is 2.0 to 3.7 amperes at 11.5-12.5 volts at clutch If coil current reads zero, the coil is open and should be replaced. If the ammeter reading is 4 am- COMPRESSOR The A/C compressor may be removed and posi- tioned without discharging the refrigerant system. WARNING: REFRIGERANT PRESSURES REMAIN HIGH REMOVAL AND INSTALLATION (1) Disconnect NEGATIVE battery cable. 7, Cooling System) and disconnect compressor clutch (3) Remove refrigerant lines from compressor (if necessary). (4) Remove compressor attaching nuts and bolts (Fig. 2 or 3). (5) Remove compressor. If refrigerant lines were not removed, lift compressor/clutch assembly and tie To install, reverse the preceding operation. Fig. 2 A/C Compressor Removal and Installation—3.3L Engines Fig. 3 A/C Compressor Removal and Installation—3.0 L Engine Ä HEATING AND AIR CONDITIONING 24 - 17 |