DTC U0073/94: Control Module Communication Bus OFF; DTC U0123/62: Lost Communication with Yaw Rate Sensor Module; DTC U0124/95: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63: Lost Communication with Steering Angle Sensor Module; DTC U0293/59: Communication Error from HV ECU: Procedure

1. Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC. Refer to CHECK FOR INTERMITTENT PROBLEMS .
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Yaw Rate Open	Yaw rate sensor open detection / Error or Normal	Error: Momentary interruption Normal: Normal	-
   Steering Open	Steering angle sensor open detection / Error or Normal	Error: Momentary interruption Normal: Normal	-
   HV Communication Open	Hybrid vehicle communication open detection / Error or Normal	Error: Momentary interruption Normal: Normal	-

   Result

   Result	Proceed to
   There is a constant open circuit	A
   There are no momentary interruptions	B
   There are momentary interruptions	C

   HINT: 

   Perform the above inspection before removing any sensor or connector.

B → See step   3 

C → See step   4 

A: Go to next step 

1. Turn the power switch off.
2. Check if each sensor and ECU connector are securely connected.

   OK

   Each sensor and ECU connector are securely connected.

NG → CONNECT CONNECTOR TO EACH SENSOR OR ECU CORRECTLY 

OK: Go to next step 

1. Turn the power switch off.
2. Record the output DTCs (for ABS, VSC, electronically controlled brake system, and/or CAN communication system). Refer to DTC CHECK / CLEAR for ABS, VSC and/or electronically controlled brake system, or DIAGNOSIS SYSTEM for CAN communication system).

   HINT: 

   If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS, VSC and/or electronically controlled brake system) after the CAN communication system returns to normal.

   Result

   Result	Proceed to
   DTC is not output	A
   DTC (ABS, VSC and/or electronically controlled brake system DTC) is output	B
   DTC (CAN communication system DTC) is output	C

B → See step   7 

C → See step   8 

A → See step   6 

1. Turn the power switch off.
2. Repair or replace the harness or connector.
3. Check for any momentary interruption between the skid control ECU and each sensor or ECU. Refer to CHECK FOR INTERMITTENT PROBLEMS .
4. Check that there are no momentary interruptions.

NEXT: Go to next step 

1. Turn the power switch off.
2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
3. Turn the power switch on (READY).
4. Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 mph) or more.
5. Check that no CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM .
6. If ABS, VSC and/or electronically controlled brake system DTCs are output, record them. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC (ABS, VSC and/or electronically controlled brake system DTC) is output	B
   DTC (CAN communication system DTC) is output	C

   HINT: 

   The CAN communication system must be normal when repairing each sensor DTC (for ABS, VSC and/or electronically controlled brake system).

B → See step   7 

C → See step   8 

A → END