DTC C0526-2A: Steering Angle Sensor Module Signal Stuck In Range [05/2019 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [05/2019 - ]

   Chassis > Brake > Clear DTCs 

2. Turn the engine switch off.
3. Turn the engine switch on (IG) again and check that no CAN communication system DTC is output.

   Refer to DIAGNOSIS SYSTEM [05/2019 - 10/2019] , or refer to DIAGNOSIS SYSTEM [10/2019 - 07/2020] , or refer to DIAGNOSIS SYSTEM [07/2020 - ]

4. Start the engine.
5. Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left to check that no speed sensor or yaw rate and acceleration sensor DTCs are output.

   Refer to DTC CHECK / CLEAR [05/2019 - ]

   Chassis > Brake > Trouble Codes 

   HINT: 

   • If there is a malfunction in any of the speed sensors or the yaw rate and acceleration sensor (airbag ECU assembly), an abnormal value may be output although the steering sensor is normal.
   • If speed sensor and yaw rate and acceleration sensor (airbag ECU assembly) DTCs are output simultaneously, repair these two sensors first and inspect the steering sensor.

   Result

   Result	Proceed to
   No CAN communication system, speed sensor, or yaw rate and acceleration sensor DTCs are output	A
   CAN communication system DTC is output	B
   Speed sensor or yaw rate and acceleration sensor DTC is output	C

Result: 

B 

CHECK CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2019 - ] 

Result: 

C 

REPAIR CIRCUIT INDICATED BY OUTPUT DTC. Refer to  DIAGNOSTIC TROUBLE CODE CHART [05/2019 - ] 

Result: 

A 

See step  2

1. Turn the engine switch off.
2. Remove the steering wheel and the column cover lower.

   for Manual Tilt and Manual Telescopic Steering Column: Refer to REMOVAL [10/2014 - ]

   for Power Tilt and Power Telescopic Steering Column: Refer to REMOVAL [10/2014 - ]

3. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

4. Disconnect the I6 steering sensor connector.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I6-5 (BAT) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (BAT CIRCUIT) 

Result: 

OK 

See step  3

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   I6-4 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT) 

Result: 

OK 

See step  4

1. Turn the engine switch off.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I6-1 (ESS) - Body ground	1 minute after disconnecting the negative (-) battery terminal	Below 1 Ω

   HINT: 

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step.

   Refer to PROBLEM SYMPTOMS TABLE [05/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE STEERING SENSOR. Refer to  REMOVAL [10/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (ESS CIRCUIT)