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Home >> Isuzu >> 2003 >> Axiom Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Miscellaneous >> A/C Clutch Control (Axiom, Rodeo, & Rodeo Sport 3.2L) >> Test Description

Test Description

CAUTION: DO NOT engage A/C compressor clutch with the engine running if an A/C mode is not selected at the A/C control switch.

Numbers below refer to the numbers in the Diagnostic Procedure:

  1. 3 -  This test determines is problem is with refrigerant system. If switch is open, A/C pressure gauges will be used to determine if pressure switch is faulty or if the system is partially discharged or empty.
  2. 4 -  Although the normal complaint will be A/C clutch fails to engage, it is possible for a short circuit to cause A/C clutch to run when A/C has not been selected. This step tests for that condition.
  3. 7 -  There is an extremely low probability that both relays will fail at the same time, so substitution process is one way to check A/C Thermostat relay. Use a known good relay to do a substitution check.

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