Inspection Procedure

1. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A27-1 (E1) - A27-2 (IG)	Engine switch off	Below 1 V
   A27-1 (E1) - A27-2 (IG)	Engine switch on (IG)	10 to 14 V

   Fig 1: Identifying AFS ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2 

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

1. Disconnect the A27 AFS ECU connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A27-1 (E1) - Body ground	Always	Below 1 Ω

   Fig 2: Identifying A27 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to Next Step 

1. Disconnect the A27 AFS ECU connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A27-1 (IG) - A27-2 (E1)	Engine switch on (IG)	10 to 14 V

   Fig 3: Identifying A27 AFS ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPLACE AFS ECU