DTC C1741: Pressure Sensor

DTC detecting condition: 

• A fault is detected if two fluid pressure signals in master cylinder are out of normal range.
• A fault is detected if the condition that supply voltage for the fluid pressure sensor is out of normal judgment range continues for predetermined time.
• A fault is detected if the communication status of fluid pressure sensor is abnormal.
• A fault is detected if the data of fluid pressure sensor is abnormal.
• A fault is detected if the offset value of fluid pressure sensor signal exceeds a predetermined judgment value.

Trouble symptom: 

• VDC does not operate sometimes.
• Hill start assist does not operate sometimes. (Models without EyeSight)
• The AVH function may not be operable. (Models with EyeSight)

1. CHECK STOP LIGHT SWITCH CIRCUIT AND INSTALLATION CONDITION. 

   Check the stop light switch circuit and the installation condition.

   Is the check result OK?

   Yes:  Go to  2.

   No:  Repair the stop light switch circuit or correct the installation condition.

   NOTE: If there is malfunction in the stop light circuit, DTC may be recorded in the memory.
2. CHECK OUTPUT OF PRESSURE SENSOR USING SUBARU SELECT MONITOR. 
   1. Using the Subaru Select Monitor, select "Data monitor". Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>SUBARU SELECT MONITOR>OPERATION>READ CURRENT DATA .
   2. Read the «Master Cylinder Pressure Sensor» displayed on display.

   With the brake pedal released, does the value for «Master Cylinder Pressure Sensor» fall within 0 - 11 bar?

   Yes:  Go to  3.

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

3. CHECK OUTPUT OF PRESSURE SENSOR USING SUBARU SELECT MONITOR. 
   1. Using the Subaru Select Monitor, select "Data monitor". Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>SUBARU SELECT MONITOR>OPERATION>READ CURRENT DATA .
   2. Read the «Master Cylinder Pressure Sensor» displayed on display.

   When the brake pedal is operated, does the value of «Master Cylinder Pressure Sensor» change in accordance with the brake pedal?

   Yes:  Go to  4.

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

4. CHECK VDC Control Module & H/U. 
   1. Perform the Clear Memory Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>CLEAR MEMORY MODE .
   2. Perform the Inspection Mode. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>INSPECTION MODE .
   3. Read the DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

   Is the same DTC displayed?

   Yes:  Replace the VDC Control Module & H/U. Refer to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDC Control Module & H/U) .

   No:  Go to  5.

5. CHECK DETECTION OF OTHER DTCS FOR VDC. 

   Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

   Is any other DTC displayed?

   Yes:  Perform the diagnosis according to DTC. Refer to VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

   No:  Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.