DTC C1732: Lateral G Sensor

DTC detecting condition: 

• A fault is detected if the sensor signal value is not correct.
• A fault is detected if the steering angle sensor signal/yaw rate sensor signal change while the lateral G sensor signal indicates a constant value.
• A fault is detected if the communication status of lateral G sensor is abnormal.

Trouble symptom: 

• ABS does not operate.
• VDC does not operate.
• AVH does not function.
• EyeSight does not operate.

Failure detection pattern: 

• "Primary" (high-priority diagnosis)

Warning light/indicator light: 

The combination of DTC and warning light display may differ from the list depending on vehicle conditions and driving conditions at the time of failure detection.

• ABS warning light -
• VDC warning light & VDC operation indicator light◦
• Electronic parking brake warning light (red)◦
• Brake warning light (EBD warning light) (red) -

1. CHECK INSTALLATION OF VDCCM & H/U  .

   Is VDCCM & H/U installed properly without being tilted?

   Is the bracket deformation-free?

   Are the VDCCM & H/U installation bolts installed without missing or getting loose?

   Yes:  GO TO  2.

   No:  Repair the defective part.

   • Install VDCCM & H/U properly.
   • Replace the bracket if faulty.
   • Tighten the VDCCM & H/U installation bolt. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>GENERAL DESCRIPTION>COMPONENT>VDC CONTROL MODULE & HYDRAULIC CONTROL UNIT (VDC CONTROL MODULE & H/U) . GO TO  2.
2. CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR  .
   1. Park the vehicle straight on a level surface.
   2. Using the Subaru Select Monitor, read data of [Steering Angle Sensor] in the [Data Monitor] of [Brake Control]. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .

   Is the value of [Steering Angle Sensor] between -10 - 10 deg?

   Yes:  GO TO  3.

   No:  Check the installation of steering angle sensor.

3. CHECK OUTPUT OF LATERAL G SENSOR AND LONGITUDINAL G SENSOR WITH SUBARU SELECT MONITOR  .
   1. Park the vehicle straight on a level surface.
   2. Using the Subaru Select Monitor, read data of [Lateral G Sensor], [Longitudinal G Sensor] in the [Data Monitor] of [Brake Control]. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .

   Are the values of [Lateral G Sensor] and [Longitudinal G Sensor] between -2 - 2 m/s² ?

   Yes:  GO TO  4.

   No:  Recheck from step  1, and if the problem is not solved, GO TO  7.

4. SET 0 POINT OF LATERAL G SENSOR AND LONGITUDINAL G SENSOR WITH SUBARU SELECT MONITOR  .
   1. Select the [Work Support] using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>WORK SUPPORT .
   2. Perform the VDC sensor midpoint setting mode. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE .

   Is 0 point setting successful?

   Yes:  GO TO  5.

   No:  Recheck from step  1, and when the 0 point setting is not possible, replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

5. PERFORM DRIVING TEST  .

   Execute the inspection mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .

   Does the ABS warning light or VDC warning light illuminate during driving?

   Does ABS or VDC operate abnormally?

   Yes:  Recheck from step  1, and when the warning lights illuminate or improperly operate, replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

   No:  GO TO  6.

6. CHECK OUTPUT OF LATERAL G SENSOR AND LONGITUDINAL G SENSOR WITH SUBARU SELECT MONITOR  .
   1. Park the vehicle on a level surface.
   2. Using the Subaru Select Monitor, read data of [Lateral G Sensor], [Longitudinal G Sensor] in the [Data Monitor] of [Brake Control]. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .

   Are the values of [Lateral G Sensor] and [Longitudinal G Sensor] between -1.5 - 1.5 m/s² ?

   Yes:  Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.

   No:  Recheck from step  1, and if the problem is not solved, replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

7. CHECK OUTPUT OF LATERAL G SENSOR AND LONGITUDINAL G SENSOR WITH SUBARU SELECT MONITOR  .
   1. Remove the VDCCM & H/U installation bolt and bracket.
   2. Keep VDCCM & H/U in a horizontal position.
   3. Using the Subaru Select Monitor, read data of [Lateral G Sensor], [Longitudinal G Sensor] in the [Data Monitor] of [Brake Control]. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .

   When the VDCCM & H/U is in a horizontal position, are the values of [Lateral G Sensor] and [Longitudinal G Sensor] between -1.5 - 1.5 m/s² ?

   Yes:  Check the bracket and brake pipe, and install VDCCM & H/U in a horizontal position to the vehicle.

   No:  Replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .