LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2008 >> Outback Base, Automatic >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System - Brakes - Abs (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC C0115 Abs Wheel Speed Sensor Signal Malfunction In One Of Four Wheels >> Wiring Diagram

DTC C0115 Abs Wheel Speed Sensor Signal Malfunction In One Of Four Wheels: Wiring Diagram

Fig 1: ABS Wheel Speed Sensor Signal Malfunction - Wiring Diagram
G05343401Courtesy of SUBARU OF AMERICA, INC.
ABS WHEEL SPEED SENSOR DIAGNOSTIC PROCEDURE

Step Check Yes No
1 WHETHER A WHEEL TURNED FREELY OR NOT. 
Check if the wheels have been turned freely for one minute or more, such as when the vehicle is jacked-up, under full-lock cornering or when the wheels are not in contact with road surface.		 Did the wheels turn freely? ABS is normal. Erase the memory.
NOTE: This diagnostic trouble code may sometimes occur if the wheels turn freely for a long time, for example when the vehicle is towed or jacked-up, or when steering wheel is continuously turned all the way.
 Go to step 2. 
2 CHECK TIRE SPECIFICATIONS. 
Turn the ignition switch to OFF.		 Are the tire specifications correct? Go to step 3.  Replace the tire.
3 CHECK WEAR OF TIRE.  Is the tire worn excessively? Replace the tire. Go to step 4. 
4 CHECK TIRE INFLATION PRESSURE.  Is the tire pressure correct? Go to step 5.  Adjust the tire pressure.
5 CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR.  Are the ABS wheel speed sensor installation bolts tightened 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)? (For four wheels) Go to step 6.  Tighten the ABS wheel speed sensor installation bolts.
6 CHECK ABS WHEEL SPEED SENSOR SIGNAL. 
  1. Install the ABS wheel speed sensor.
  2. Prepare an oscilloscope.
  3. Check the ABS wheel speed sensor. <Ref. to ABS WHEEL SPEED SENSOR , INSPECTION, Front ABS Wheel Speed Sensor.>
 Does the oscilloscope indicate the waveform pattern like shown in the figure when the tire is slowly turned? Does the oscilloscope indication repeat the waveform pattern like shown in the figure when the tire is slowly turned in equal speed for one rotation or more? Go to step 8.  Go to step 7. 
7 CHECK ABS WHEEL SPEED SENSOR OR MAGNETIC ENCODER.  Are there foreign matter, breakage or damage at the tip of ABS wheel speed sensor or magnetic encoder? Remove dirt throughly. Also replace the ABS wheel speed sensor or magnetic encoder as a unit with hub unit bearing if it is broken or damaged. Go to step 8. 
8 CHECK ABSCM&HAJ. 
  1. Connect all connectors.
  2. Erase the memory.
  3. Perform the Inspection Mode. <Ref. to CLEAR MEMORY MODE , OPERATION, Subaru Select Monitor.>
  4. Read the DTC.
 Is the same DTC displayed? Replace the ABSCM only. <Ref. to REPLACEMENT , ABS Control Module and Hydraulic Control Unit (ABSCM&H/U).> Go to step 9. 
9 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Perform the diagnosis according to DTC. It results from a temporary noise interference.
NOTE: Though the ABS warning light remains on at this time, it is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn ABS warning light off. Be sure to drive the vehicle and check that the warning light goes off.
scientia non olet · About LEMON Manuals