Inspection Procedure

HINT:

• When U0073/94, U0123/62, U0124/95 or U0126/63 is output together with C1231/31, inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.
• When the speed sensor or the yaw rate sensor has trouble, DTCs for the steering sensor may be output even when the steering sensor is normal. When DTCs for the speed sensor (C0200/31, C0205/32, C0210/33, C0215/34, C1235/35, C1236/36, C1238/38, C1239/39) or yaw rate and deceleration sensor (C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, C1381/81) are output together with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and then inspect and repair the steering sensor.

1. CHECK TERMINAL VOLTAGE (STEERING SENSOR CONNECTOR) 
   1. Remove the steering wheel and the column lower cover.
   2. Disconnect the steering sensor connector.
   3. Turn the ignition switch to the ON position.
   4. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (1 OF 2)
      
      

      Tester Connection	Condition	Specified Condition
      S12-1 (IG1) - S12-2 (ESS)	IG switch ON	10 to 14 V

   5. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (2 OF 2)
      
      

      Tester Connection	Condition	Specified Condition
      S12-3 (BAT) - S12-2 (ESS)	IG switch ON	10 to 14 V

      Fig 1: Checking Terminal Voltage (Steering Sensor Connector)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE  STEERING SENSOR  ) 

   DTC C1232/32 MALFUNCTION IN DECELERATION SENSOR, DTC C1234/34 MALFUNCTION IN YAW RATE SENSOR 

   DTC C1243/43 MALFUNCTION IN DECELERATION SENSOR CIRCUIT, DTC C1244/44 OPEN OR SHORT IN DECELERATION SENSOR CIRCUIT 

   DTC C1245/45 MALFUNCTION IN DECELERATION SENSOR, DTC C1381/97 MALFUNCTION IN POWER SUPPLY VOLTAGE YAW/DECELERATION SENSOR 

HINT:

When U0073/94, U0123/62, U0124/95 or U0126/63 is output together with C1232/32 or C1334/34, inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.

1. CHECK SENSOR INSTALLATION (YAW RATE SENSOR) 
   1. Check that the yaw rate (deceleration) sensor has been installed properly (see YAWRATE SENSOR ).

   OK: 

   • The sensor should be tightened to the specified torque. 
   • The sensor should not be tilted. 

   NG: INSTALL YAW RATE SENSOR CORRECTLY (SEE  YAWRATE SENSOR  ) 

   OK: Go to next step. 

2. CHECK HARNESS AND CONNECTOR (IG TERMINAL) 
   1. Disconnect the yaw rate (deceleration) sensor connector.
   2. Turn the ignition switch to the ON position.
   3. Measure the voltage according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (1 OF 2)
   
   

   Tester Connection	Condition	Specified Condition
   Y1-5 (IG) - Body ground	IG switch ON	10 to 14 V

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT) 

   Fig 1: Checking Harness And Connector (IG Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step. 

3. CHECK HARNESS AND CONNECTOR (GND TERMINAL) 
   1. Disconnect the yaw rate (deceleration) sensor connector.
   2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (2 OF 2)
   
   

   Tester Connection	Specified Condition
   Y1-1 (GND) - Body ground	Below 1 Ω

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

   Fig 2: Checking Harness And Connector (GND Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step. 

4. CHECK DTC (C1210/36, C1336/39) 

1. Check DTCs (see DTC CHECK/CLEAR ).

Result: 

B: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

A 

REPLACE YAW RATE SENSOR ASSY (SEE  YAWRATE SENSOR  )