Subaru Crosstrek Service Manual: General diagnostic table Inspection
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > General Diagnostic Table
INSPECTION
Symptoms | Main probable cause | Other probable cause | |
Poor brake performance | Long braking/stopping distance | ||
• VDCCM&H/U
• Brake pad
• Aeration to brake line
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Master cylinder
• Brake caliper
• Disc rotor
• Brake pipe
• Brake booster
Wheel lock
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Incorrect wiring or piping connections
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Brake caliper
• Brake pipe
Brake drag
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Master cylinder
• Brake caliper
• Parking brake
• Axle and wheels
• Brake pedal play
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Brake pad
• Brake pipe
Long brake pedal stroke
• Aeration to brake line
• Brake pedal play
• VDCCM&H/U
• Master cylinder
• Brake caliper
• Brake pad
• Brake pipe
• Brake booster
Vehicle vertical pitching
• VDCCM&H/U
• Road surface (uneven)
• Suspension play or fatigue (reduced damping)
• Incorrect wiring or piping connections
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
Poor brake performance
Unstable or uneven braking
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Brake caliper
• Brake pad
• Road surface (uneven)
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Master cylinder
• Disc rotor
• Brake pipe
• Axle and wheels
• Road with crowns or banks
• Suspension play or fatigue (reduced damping)
Vibration or noise
• When braking suddenly
• When accelerating suddenly
• While driving on a slippery road
Excessive brake pedal vibration
• Road surface (uneven)
• Incorrect wiring or piping connections
• VDCCM&H/U
• Brake booster
• Suspension play or fatigue (reduced damping)
Noise from VDCCM&H/U
• VDCCM&H/U (mount bushing)
• Defective ABS wheel speed sensor or sensor gap
• Brake pipe
• VDCCM&H/U
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
Noise from the front side of vehicle
• VDCCM&H/U (mount bushing)
• Defective ABS wheel speed sensor or sensor gap
• Master cylinder
• Brake caliper
• Brake pad
• Disc rotor
• Brake pipe
• Brake booster
• Suspension play or fatigue (reduced damping)
• Axle and wheels
• Tire specifications, tire wear and air pressures
Noise from the rear side of vehicle
• Defective ABS wheel speed sensor or sensor gap
• Brake caliper
• Brake pad
• Disc rotor
• Parking brake
• Brake pipe
• Suspension play or fatigue (reduced damping)
• Axle and wheels
• Tire specifications, tire wear and air pressures
Engine does not accelerate or goes into a stall when accelerating suddenly or driving on a slippery surface.
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Master cylinder
• Brake caliper
• Parking brake
• Incorrect wiring or piping
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Brake pad
• Brake pipe
Poor change-direction-operation stability of TCS
Deviation to right or left direction
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Brake caliper
• Brake pad
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Disc rotor
• Brake pipe
• Axle and wheels
• Suspension play or fatigue (reduced damping)
Vehicle spin
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Brake pad
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Brake caliper
• Brake pipe
Steering wheel drag while driving
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Incorrect wiring or piping connections
• Power steering system
• Brake caliper
• Brake pad
• Disc rotor
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Suspension play or fatigue (reduced damping)
• Tire specifications, tire wear and air pressures
VDC operates while driving normally.
• VDCCM&H/U
• Defective ABS wheel speed sensor or sensor gap
• Defective steering angle sensor or improper neutral position
• Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
• Wheel alignment
• Road surface (uneven)
• Road with crowns or banks
• Suspension play or fatigue (reduced damping)
• Tire specifications, tire wear and air pressures
• Incorrect wiring or piping connections
• Power steering system
VDC OFF indicator light does not illuminate when the VDC OFF switch is depressed.
NOTE:
When pressing VDC OFF switch for 10 seconds or more, VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the previous status is restored.
• Harness
• Combination meter
• VDC OFF switch
Electrical component location Location
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Electrical Component LocationLOCATION(1)VDC control module and hydraulic control unit (VDCCM&H/U)(7)VDC OFF indicator light(12)ABS wheel speed sen ...
Inspection mode Procedure
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Inspection ModePROCEDUREReproduce the malfunction occurrence condition as much as possible.Drive the vehicle at least ten minutes.NOTE:Make sure the v ...
Other materials:
Other markings
The following makings are also
placed on the sidewall.
Maximum permissible inflation
pressure
The maximum cold inflation pressure
to which this tire may be
inflated. For example, "300 kPa
(44 PSI) MAX. PRESS"
Maximum load rating
The load rating at the maximum
permissible weight load for th ...
Dtc u0101 lost communication with tcm
LAN SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC U0101 LOST COMMUNICATION WITH TCMDTC detecting condition:No data is received from TCM.Trouble symptom:Cooperation control with transmission is not performed.STEPCHECKYESNO1.CHECK PERFORMING OF BASIC DIAGNOSTIC P ...
Dtc u1235 lost communication with eyesight
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC U1235 LOST COMMUNICATION WITH EyeSightNOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure">1. OUTLINE OF DIAGNOSIS• De ...
