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Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Parking Brake System (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC C0275 Longitudinal G Sensor Circuit >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step Check Yes No
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?		 Go to step 2  . Repair the fault location. Go to step 2  .
2 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. 
  1. Park the vehicle on a level surface.
  2. Connect Subaru Select Monitor, and select "VDC" and then "Current Data Display & Save". < Refer to READ CURRENT DATA , OPERATION, Subaru Select Monitor. >
  3. Read the «Fr Rr G sensor Output» displayed on display.
 Is the indicated reading of the longitudinal G sensor on the monitor display -2 - 2 m/s2 ? Go to step 3  . Recheck from step 1, and if the problem is not solved, go to next. Go to step 6  .
3 SET 0 POINT FOR LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. 
  1. Select "VDC", and then "Function Check Sequence".
  2. Perform the "Longitudinal G sensor & lateral G sensor 0 point setting mode". < Refer to LONGITUDINAL G SENSOR & LATERAL G SENSOR 0 POINT SETTING MODE , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >
 Is the 0 point setting successful? Go to step 4  . Recheck from step 1, and when the 0 point setting is not possible, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 DRIVING INSPECTION. 
Drive the vehicle approximately 10 minutes, and check if the warning lights illuminate/blink or improperly operate during driving. In a safe place, drive the vehicle while alternating acceleration and deceleration as much as possible.		 Does the electronic parking brake warning light remain off without blinking? (C6 model) Does the brake warning light remain off? (Models other than C6 model)
Does the parking brake operate without malfunction?		 Go to step 5  . Recheck from step 1, and if the warning lights illuminate/blink or there is abnormal operation, replace the electronic parking CM. < Refer to PARKING BRAKE ACTUATOR . >
5 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. 
  1. Park the vehicle on a level surface.
  2. Connect Subaru Select Monitor, and select "VDC" and then "Current Data Display & Save". < Refer to READ CURRENT DATA , OPERATION, Subaru Select Monitor. >
  3. Read the «Fr Rr G sensor Output» displayed on display.
 Is the indicated reading of the longitudinal G sensor on the monitor display -1.5 - 1.5 m/s2 ? It results from a temporary noise interference. Recheck from step 1, and if the problem is not solved, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. 
  1. Remove the VDCCM&H/U installation bolt and bracket.
  2. Keep VDCCM&H/U in a horizontal position.
  3. Connect Subaru Select Monitor, and select "VDC" and then "Current Data Display & Save". < Refer to READ CURRENT DATA , OPERATION, Subaru Select Monitor. >
  4. Read the «Fr Rr G sensor Output» displayed on display.
 When the VDCCM&H/U is in a horizontal position, is the indicated reading of the longitudinal G sensor on the monitor display -1.5 - 1.5 m/s2 ? Check the bracket and brake pipe, and install VDCCM&H/U in a horizontal position to the vehicle. Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
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