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A/C Clutch Relay

WARNING: This page is about a different car, the 1998 Infiniti Q45 and 1998 Infiniti I30. However, it is still accessible from the selected car via links, so may be relevant.
  1. A/C clutch relay is controlled by PCM. Under normal conditions, PCM will engage clutch relay by providing a ground circuit for relay windings. If PCM receives a wide open throttle signal from throttle position sensor while it is also receiving a A/C on signal from A/C auto amplifier, PCM will disengage relay.
  2. A/C clutch relay (Blue or Green) is located in relay box on right side of engine compartment. On I30 and Q45, relay is in rearmost position.
  3. Remove relay from relay box. Apply ground to terminal No. 2 of relay. See Fig 1 . Apply battery voltage to terminal No. 1. With relay energized, continuity should exist between terminals No. 3 and 5. No continuity should exist with relay de-energized. Replace relay if test values are not as specified.
Fig 1: Identifying A/C Clutch Relay Terminals
G90B15223Courtesy of NISSAN MOTOR CO., U.S.A.
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