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) 
   1. Remove the A/C fuse from the main body ECU.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A/C fuse	Always	Below 1 Ω

   3. Reinstall the A/C fuse.

   NG: REPLACE FUSE 

   Fig 1: Identifying A/C Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

2. INSPECT AIR CONDITIONING AMPLIFIER (IG+ - GND) 
   1. Remove the air conditioning amplifier with the connectors still connected (See REMOVAL  ).
   2. Turn the ignition switch to ON.
   3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      G7-8 (IG+) - G7-12 (GND)	Ignition switch ON	11 to 14 V

   4. Reinstall the air conditioning amplifier.

   NG: Go to step 3 

   Fig 2: Identifying Air Conditioning Amplifier Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY) 
   1. Disconnect the G7 air conditioning amplifier connector.
   2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      G7-8 (IG+) - Body ground	Ignition switch OFF	Below 1 V
      	Ignition switch ON	11 to 14 V

   3. Reconnect the air conditioning amplifier connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 3: Identifying Air Conditioning Amplifier Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BODY GROUND) 
   1. Disconnect the G7 air conditioning amplifier connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      G7-12 (GND) - Body ground	Always	Below 1 Ω

   3. Reconnect the air conditioning amplifier connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 4: Identifying Air Conditioning Amplifier Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK : REPLACE AIR CONDITIONING AMPLIFIER  (See REMOVAL  )