Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Data List.
5. Read the display on the Techstream.

   AFS (AFS ECU) 

   DATA LIST - AFS (AFS ECU)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   +B	Battery voltage value / 0 to 20	Engine switch off Below 1 V Engine switch on (IG) 11 to 14 V	-

   OK: Battery voltage is within the specified normal condition. 

NG: Go to step 2 

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

   STANDARD RESISTANCE SPECIFICATION
   
   

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

Fig 1: Identifying A27 AFS ECU Connector
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 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   A27-2 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

Fig 2: Identifying A27 AFS ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPLACE AFS ECU  (See AFS ECU  )