Inspection Procedure

1. Remove the A/C and AM1 fuse from the cowl side junction block LH.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

1. Remove the IG1 NO. 2 relay from the cowl side junction block LH.
2. Measure the resistance of the relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

NG: REPLACE IG1 NO. 2 RELAY 

Fig 1: Identifying IG1 NO. 2 Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the A49 A/C amplifier connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   IG (A49-22) - GND (A49-12)	Ignition Switch ON	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   IG (A49-22) - Body ground	10 kΩ or higher
   GND (A49-12) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying A49 A/C Amplifier Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE AIR CONDITIONING AMPLIFIER