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NOTE: The air gap is determined by the spacer (12) To complete the procedure, (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING/A/C A/C COMPRESSOR CLUTCH DESCRIPTION The a/c compressor clutch relay is a International Standards Organization (ISO) micro-relay. The termi- ISO relay. However, the micro-relay terminal orientation (footprint) is different, the cur- OPERATION The compressor clutch relay is a electromechanical device that switches battery current to the compres- The compressor clutch relay is located in the Power Distribution Center (PDC) in the engine compart- The compressor clutch relay cannot be repaired and, if faulty or damaged, it must be replaced. DIAGNOSIS AND TESTING - A/C COMPRESSOR RELAY TEST The compressor clutch relay (Fig. 12) is located in the Power Distribution Center (PDC). Refer to the (1) A relay in the de-energized position should have continuity between terminals 87A and 30, and (2) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 ± 5 ohms. If OK, go to Step (3) Connect a battery to terminals 85 and 86. There should now be continuity between terminals RELAY CIRCUIT TEST For circuit descriptions and diagrams, (Refer to Appropriate Wiring Information). (1) The relay common feed terminal cavity (30) is connected to fused battery feed. There should be bat- Fig. 11 CHECK CLUTCH AIR GAP 1 - FEELER GAUGE Fig. 12 COMPRESSOR CLUTCH RELAY TERMINAL LEGEND NUMBER IDENTIFICATION 30 COMMON FEED 85 COIL GROUND 86 COIL BATTERY 87 NORMALLY OPEN 87A NORMALLY CLOSED 24 - 14 CONTROLS AN A/C COMPRESSOR CLUTCH (Continued) |