LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2007 >> B9 Tribeca Base >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Vehicle Dynamics Control (VDC) (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC C0028 Rear Abs Wheel Speed Sensor LH Signal Malfunction >> Wiring Diagram

DTC C0028 Rear Abs Wheel Speed Sensor LH Signal Malfunction: Wiring Diagram

Fig 1: Rear ABS Wheel Speed Sensor LH Signal Malfunction - Wiring Diagram
G05032723Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC TROUBLE CODE REFERENCE

Step Check Yes No
1 CHECK THE VDCCM & H/U POWER SUPPLY CIRCUIT  .
  1. Turn the ignition switch to OFF.
  2. Disconnect the VDCCM & H/U connector.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between VDCCM & H/U connector terminals.

    Connector & terminal 

    (B310) No. 1 (+) - (B310) No. 43 (-): 

 Is the voltage 10 - 15 V? Go to step 2  . Check the generator, battery and VDCCM & H/U power supply circuit.
2 CHECK OUTPUT OF ABS WHEEL SPEED SENSOR USING SUBARU SELECT MONITOR  .
  1. Select {Current Data Display & Save} in Subaru Select Monitor.
  2. Read the ABS wheel speed sensor output corresponding to the faulty wheel in Subaru Select Monitor data display mode.
 Does the speed indicated on the display change in response to the speedometer reading during acceleration/deceleration when the steering wheel is in the straight-ahead position? Go to step 3  . Go to step 8  .
3 CHECK POOR CONTACT OF CONNECTOR  .
Turn the ignition switch to OFF.		 Is there poor contact in connectors between VDCCM & H/U and ABS wheel speed sensor? Repair the connector. Go to step 4  .
4 CHECK CAUSE OF SIGNAL NOISE  .
Make sure the radio wave devices and electric components are installed correctly.		 Are the radio wave devices and electric components installed correctly? Go to step 5  . Install the radio wave devices and electric components properly.
5 CHECK CAUSE OF SIGNAL NOISE  .
Check if the noise sources (such as an antenna) are installed near the sensor harness.		 Are noise sources installed? Install the noise sources apart from sensor harness. Go to step 6  .
6 CHECK THE VDCCM & H/U  .
  1. Connect all the connectors.
  2. Erase the memory.
  3. Perform the Inspection Mode. <Ref. to PROCEDURE , Inspection Mode .>
  4. Read the DTC.
 Is the same DTC displayed? Replace the VDCCM & H/U. <Ref. to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) . > Go to step 7  .
7 CHECK OTHER DTC DETECTION  . Is any other DTC displayed? Perform the diagnosis according to DTC. It results from a temporary noise interference.
8 CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR  . Is the ABS wheel speed sensor installation bolt tightened 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)? Go to step 9  . Tighten the ABS wheel speed sensor installation bolts.
9 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 more one rotation? Go to step 11  . Go to step 10  .
10 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 thoroughly. 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 11  .
11 CHECK CAUSE OF SIGNAL NOISE  .
Make sure the radio wave devices and electric components are installed correctly.		 Are the radio wave devices and electric components installed correctly? Go to step 12  . Install the radio wave devices and electric components properly.
12 CHECK CAUSE OF SIGNAL NOISE  .
Check if the noise sources (such as an antenna) are installed near the sensor harness.		 Is the noise sources installed? Go to step 13  . Install the noise sources apart from sensor harness.
13 CHECK THE VDCCM & H/U  .
  1. Connect all the connectors.
  2. Erase the memory.
  3. Perform the Inspection Mode. <Ref. to PROCEDURE , Inspection Mode .>
  4. Read the DTC.
 Is the same DTC displayed? Replace the VDCCM & H/U. <Ref. to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) . > Go to step 14  .
14 CHECK OTHER DTC DETECTION  . 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 more than 12 km/h (7 MPH) in order to turn ABS warning light off. Be sure to drive the vehicle and check the warning light goes off.
scientia non olet · About LEMON Manuals