Inspection Procedure

HINT:

Start the engine before inspection. Check the IG1 relay or battery if the engine does not start.

1. INSPECT FUSE (A/C NO. 2) 
   1. Remove the A/C No. 2 fuse from the instrument panel J/ B.
   2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      FUSE (A/C NO. 2)
      
      

      Tester Item	Condition	Specified Condition
      A/C No. 2 fuse	Always	Below 1 Ω

   Fig 1: Identifying A/C No. 2 Fuse Location

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE FUSE (A/C NO. 2) 

   OK: Go to Next Step 

2. INSPECT AIR CONDITIONING AMPLIFIER (IG+ - GND) 
   1. Remove the A/C amplifier with its connectors still connected.
   2. Turn the engine switch on (IG).
   3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      AIR CONDITIONING AMPLIFIER (IG+ - GND) VOLTAGE
      
      

      Tester Connection	Condition	Specified Condition
      E1-1 (IG+) - E1-14 (GND)	Engine switch on (IG)	10 to 14 V

   Fig 2: Identifying A/C Amplifier Connectors Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step 3 

   OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY) 
   1. Disconnect the A/C amplifier connector.
   2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      AIR CONDITIONING AMPLIFIER - BATTERY VOLTAGE
      
      

      Tester Connection	Condition	Specified Condition
      E1-1 (IG+) - Body ground	Engine switch off	Below 1 V
      	Engine switch on (IG)	10 to 14 V

   Fig 3: Identifying A/C Amplifier Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

4. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BODY GROUND) 
   1. Disconnect the A/C amplifier connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      AIR CONDITIONING AMPLIFIER - BODY GROUND RESISTANCE
      
      

      Tester Connection	Condition	Specified Condition
      E1-14 (GND) - Body ground	Always	Below 1 Ω

   Fig 4: Identifying A/C Amplifier Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE AIR CONDITIONING AMPLIFIER