Diagnosis Procedure

A/C auto amp. transmits the A/C auto amp. connection recognition signal to the combination meter.

1. CHECK A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL 
   1. Turn ignition switch ON.
   2. Check voltage between combination meter harness connector and ground.

      Terminals			Voltage (Approx.)
      (+)		(-)
      Combination meter		Ground
      Connector	Terminal
      M53	19	Ground	5 V

   Is the inspection result normal?

   YES

   INSPECTION END

   NO

   GO TO 2.

2. CHECK A/C AUTO AMP. CONNECTION RECOGNITION SIGNAL CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect combination meter connector and A/C auto amp. connector.
   3. Check continuity between combination meter harness connector and A/C auto amp. harness connector.

      Combination meter		A/C auto amp.		Continuity
      Connector	Terminal	Connector	terminal
      M53	19	M66	34	Existed

   4. Check continuity between combination meter harness connector and ground.

      Combination meter		Ground	Continuity
      Connector	Terminal
      M53	19	Ground	Not existed

   Is the inspection result normal?

   YES

   INSPECTION END

   NO

   Repair harness or connector.