DTC C1234: Yaw Rate Sensor; DTC C1472: Acceleration Sensor [08/2013 - 12/2013]: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
2. Turn the ignition switch off.
3. Start the engine.
4. At a speed of 30 km/h (18 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.
5. Turn the ignition switch to ON again and check that no CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM [08/2013 - 12/2013] .

   Result

   Result	Proceed to
   CAN communication system DTC is not output.	A
   CAN communication system DTC is output.	B

B → See step   5 

A: Go to next step 

1. Turn the ignition switch off.
2. Check that the yaw rate and acceleration sensor (airbag sensor assembly) has been installed properly. Refer to INSTALLATION [08/2013 - ] .

   OK

   The sensor should be tightened to the specified torque.

   The sensor should not be tilted.

NG → See step   6 

OK: Go to next step 

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the yaw rate and acceleration sensor (airbag sensor assembly) connector.
3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I47-21 (IG2) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

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

OK: Go to next step 

1. Turn the ignition switch off.

   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
   I47-25 (E1) - Body ground	Always	Below 1 Ω
   I47-26 (E2) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - 12/2013] .

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

OK → See step   7