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ON-VEHICLE SERVICE TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-107 ON-VEHICLE SERVICE A/C COMPRESSOR CLUTCH TEST M1552019900140 1. Disconnect the A/C compressor clutch connector to the A/C compressor clutch. 2. Connect positive battery voltage directly to the connector for the A/C compressor clutch. 3. If the A/C compressor clutch is normal, there will be a "click". If the pulley and armature do not make contact ("no click"), SIMPLE INSPECTION OF THE A/C PRESSURE M1552014700516 1. Assemble a gauge manifold on the high-pressure service valve. 2. Disconnect the A/C pressure sensor connector and connect special tool test harness MB991658 as shown in the illustra- 3. Turn ON the engine and then turn ON the A/C switch. AC711346 AC702631AB A/C pressure sensor AC307368 A/C MB991658 AC Harness side |