Steering Angle Sensor Communication Stop Mode: Procedure

1. Turn the power switch off.
2. Disconnect the steering angle sensor connector.
   Fig 1: Identifying L51 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Steering Angle Sensor)

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   L51-4 (CANH) - L51-3 (CANL)	Power switch off	54 to 69 Ω

NG → REPAIR OR REPLACE CAN MAIN BUS BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR BRANCH WIRE) 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying L51 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   L51-5 (IG1) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Steering Angle Sensor)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK: Go to next step 

1. Turn the power switch off.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying L51 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L51-2 (ESS) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Steering Angle Sensor)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

OK → See step   4