DTC C1528: Motor Rotation Angle Sensor Malfunction [08/2015 - ]: Procedure

1. Check the connection condition of the motor rotation angle sensor connector.

   OK

   Motor rotation angle sensor connector is securely connected to the power steering ECU assembly.

NG → CONNECT CONNECTOR 

OK: Go to next step 

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Turn the Techstream on.
5. Enter the following menus: Chassis / EMPS / Data List.
6. Select the item "Motor Rotation Angle" in the Data List and read the value displayed on the Techstream.
   EMPS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Motor Rotation Angle	Motor rotation angle/ Min.: 0 deg Max.: 1441.770 deg	During steering operation, motor rotation angle value changes from 0 to 360°	Engine running and steering wheel being turned

   OK

   During steering operation, motor rotation angle value changes from 0 to 360°.

NG → See step   3 

OK → See step   6 

1. Disconnect the connector from the motor rotation angle sensor.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   c-6 (RZV1) - c-2 (RZV2)	25°C (77°F)	14.0 to 17.2 Ω
   c-5 (RZCS1) - c-1 (RZCS2)	25°C (77°F)	25.8 to 31.6 Ω
   c-7 (RZSN1) - c-3 (RZSN2)	25°C (77°F)	25.8 to 31.6 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   4 

OK → See step   5