Inspection Procedure

1. Remove the ECU-B2 fuse from the cowl side junction block RH.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

OK: REPLACE FUSE 

NG: 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
   +B (A49-11) - GND (A49-12)	Always	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   +B (A49-11) - Body ground	10 kΩ or higher
   GND (A49-12) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 1: Identifying A/C Amplifier Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE AIR CONDITIONING AMPLIFIER