Inspection Procedure

1. Remove the H-LP LVL fuse from main body ECU LH.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: GO TO Next Step 

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   A29-2 (IG) - Body ground	Power switch ON (IG)	10 to 14 V

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   A29 - 1 (E1) - Body ground	Below 1 Ω

   Fig 1: Identifying A29 AFS ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

Fig 2: Identifying A30 Main Body ECU LH And A29 AFS ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A29 and A30 ECU connectors.
2. Disconnect the 1X relay block connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   A29-5 (MPX1) - A30-6 (MPX4)	Below 1 Ω
   A29-6 (MPX2) - 1X-6	Below 1 Ω

   Result 

   RESULT REFERENCE CHART
   
   

   Result	Proceed to
   Both are OK	A
   One is OK	B
   Both are NG	C

B: REPAIR OR REPLACE HARNESS OR CONNECTOR 

C: REPAIR OR REPLACE AFS ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: REPLACE AFS ECU