Inspection Procedure

1. Measure the voltage of the connector.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A29-1 - A29-2	Engine switch off	Below 1 V
   A29-1 - A29-2	Engine switch on (IG)	10 to 14 V

Fig 1: Identifying AFS ECU Connector Terminal

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NG: Go to step 2 

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

1. Disconnect the A29 connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A29-1 - Body ground	Always	Below 1 Ω

Fig 2: Identifying A29 Connector

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NG: REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - BODY GROUND) 

OK: Go to next step 

1. Disconnect the A29 connector.
2. Measure the voltage of the connector.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A29-1 - A29-2	Engine switch on (IG)	10 to 14 V

Fig 3: Identifying A29 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR (AFS ECU - BATTERY) 

OK: REPLACE AFS ECU