Steering Angle Sensor Communication Stop Mode: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the steering angle sensor connector.
   Fig 1: Checking L51 Connector Terminals

   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)	Cable disconnected from negative (-) auxiliary battery terminal	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. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking L51 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L51-2 (ESS) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	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: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Checking L51 Connector Terminals

   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 → See step   4