Inspection Procedure

1. INSPECT FUSE (AM2) 
   1. Remove the AM2 fuse from the cowl side J/B RH.
   2. Measure the resistance of the fuse.

      Standard resistance: 

      Below 1 Ω 

   NG: REPLACE FUSE 

   OK: Go to next step 

2. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) 
   1. Disconnect the J55 ECU connector.
   2. Measure the resistance and voltage of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Condition	Specified Condition
   J55-33 (AM1) - Body ground	Always	10 to 14 V
   J55-12 (AM2) - Body ground	Always	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   J55-6 (GND2) - Body ground	Below 1 Ω

   Fig 1: Identifying J55 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. CHECK RESISTANCE OF COMMUNICATION LINE 
   1. Disconnect the J55, J26 and 2F ECU connectors.
   2. Measure the resistance between the specified terminals on the wire harness side connectors.

   Standard resistance 

Result 

Fig 2: Identifying J55, J26 And 2F ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: REPLACE POWER SOURCE CONTROL ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: REPLACE POWER SOURCE CONTROL ECU