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Pinpoint Test

  1. CHECK FOR FAULT REPEATABILITY
    1. Ignition ON.
    2. Using a scan tool, clear all ABS module DTCs  .
    3. Test drive the vehicle above 20 kmh (12.4 mph) and carry out at least 1 ABS stop.
    4. Bring the vehicle to a safe stop.
    5. Ignition OFF.
    6. Ignition ON.
    7. Using a scan tool, carry out the ABS module self-test.

    Is the DTC still present? 

    1. Yes: If the Rotunda ABS Active Wheel Speed Sensor Tester is available, GO to 2  .

      If the Rotunda ABS Active Wheel Speed Sensor Tester is not available, GO to  4  .

    2. No: The system is operating correctly at this time. INSPECT both front wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.
  2. CHECK THE ABS MODULE OUTPUT USING THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER
    1. Ignition OFF.
    2. Disconnect suspect wheel speed sensor electrical connector.
    3. Connect the Rotunda ABS Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
    4. Ignition ON.
    5. Select the correct system polarity on the Rotunda ABS Active Wheel Speed Sensor Tester and turn the power switch to the ON position.

    Is the tester output LED illuminated? 

    1. Yes: GO to 3  .
    2. No: GO to  5  .
  3. CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ABS ACTIVE WHEEL SPEED SENSOR TESTER
    1. Raise the suspect wheel until it can spin freely. REFER to JACKING AND LIFTING for lifting points.
    2. While monitoring the Rotunda ABS Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.

    Do the sensor output LEDs illuminate and flash and is the current overload LED not illuminated? 

    1. Yes: The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.
    2. No: INSTALL a new wheel speed sensor. REFER to Wheel Speed Sensor - Rear .
  4. CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE
    1. Ignition OFF.
    2. Disconnect ABS Module electrical connector.
    3. Disconnect suspect wheel speed sensor electrical connector.
    4. Ignition ON.
    5. For the LR wheel speed sensor, measure:
      ABS Module Ground
      G08028216
      G08028217
      C135 Ground
      Pin Circuit Measurement / Action Pin Circuit
      36 VCA04 (BU/OG)
      G08028218
      		 - Ground
      37 RCA18 (BN/GN)
      G08028219
      		 - Ground
    6. For the RR wheel speed sensor, measure:
      ABS Module Ground
      G08028220
      G08028221
      C135 Ground
      Pin Circuit Measurement / Action Pin Circuit
      42 RCA20 (BN)
      G08028222
      		 - Ground
      43 VCA06 (WH/OG)
      G08028223
      		 - Ground

    Is any voltage present? 

    1. Yes: REPAIR the affected circuit(s).
    2. No: For vehicles not equipped with active park assist, GO to 5  .

      For vehicles equipped with active park assist, GO to  7  .

  5. CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN
    1. Ignition OFF.
    2. For the LR wheel speed sensor, measure:
      ABS Module LR Wheel Speed Sensor
      G08028224
      G08028225
      C135 C440
      Pin Circuit Measurement / Action Pin Circuit
      36 VCA04 (BU/OG)
      G08028226
      		 2 VCA04 (BU/OG)
      37 RCA18 (BN/GN)
      G08028227
      		 1 RCA18 (BN/GN)
    3. For the RR wheel speed sensor, measure:
      ABS Module RR Wheel Speed Sensor
      G08028228
      G08028229
      C135 C426
      Pin Circuit Measurement / Action Pin Circuit
      42 RCA20 (BN)
      G08028230
      		 1 RCA20 (BN)
      43 VCA06 (WH/OG)
      G08028231
      		 2 VCA06 (WH/OG)

    Are the resistances less than 3 ohms? 

    1. Yes: GO to 6  .
    2. No: REPAIR the affected circuit(s).
  6. CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
    1. For the LR wheel speed sensor, measure:
      LR Wheel Speed Sensor LR Wheel Speed Sensor
      G08028232
      G08028233
      C440 C440
      Pin Circuit Measurement / Action Pin Circuit
      1 RCA18 (BN/GN)
      G08028234
      		 2 VCA04 (BU/OG)
    2. For the RR wheel speed sensor, measure:
      RR Wheel Speed Sensor RR Wheel Speed Sensor
      G08028235
      G08028236
      C426 C426
      Pin Circuit Measurement / Action Pin Circuit
      1 RCA20 (BN)
      G08028237
      		 2 VCA06 (WH/OG)

    Is the resistance greater 10, 000 ohms? 

    1. Yes: GO to  9  .
    2. No: REPAIR the affected circuit(s).
  7. CHECK THE BI-DIRECTIONAL WHEEL SPEED SENSOR CIRCUITS FOR AN OPEN
    1. Ignition OFF.
    2. For the LR wheel speed sensor, measure:
      ABS Module LR Wheel Speed Sensor
      G08028238
      G08028239
      C135 C4261
      Pin Circuit Measurement / Action Pin Circuit
      36 VCA04 (BU/OG)
      G08028240
      		 1 VCA04 (BU/OG)
      37 RCA18 (BN/GN)
      G08028241
      		 2 RCA18 (BN/GN)
    3. For the RR wheel speed sensor, measure:
      ABS Module RR Wheel Speed Sensor
      G08028242
      G08028243
      C135 C4260
      Pin Circuit Measurement / Action Pin Circuit
      42 RCA20 (BN)
      G08028244
      		 2 RCA20 (BN)
      43 VCA06 (WH/OG)
      G08028245
      		 1 VCA06 (WH/OG)

    Are the resistances less than 3 ohms? 

    1. Yes: GO to 8  .
    2. No: REPAIR the affected circuit(s).
  8. CHECK FOR SHORTED BI-DIRECTIONAL WHEEL SPEED SENSOR CIRCUITS
    1. For the LR wheel speed sensor, measure:
      LR Wheel Speed Sensor LR Wheel Speed Sensor
      G08028246
      G08028247
      C4261 C4261
      Pin Circuit Measurement / Action Pin Circuit
      2 RCA18 (BN/GN)
      G08028248
      		 1 VCA04 (BU/OG)
    2. For the RR wheel speed sensor, measure:
      RR Wheel Speed Sensor RR Wheel Speed Sensor
      G08028249
      G08028250
      C4260 C4260
      Pin Circuit Measurement / Action Pin Circuit
      2 RCA20 (BN)
      G08028251
      		 1 VCA06 (WH/OG)

    Is the resistance greater 10, 000 ohms? 

    1. Yes: GO to 9  .
    2. No: REPAIR the affected circuit(s).
  9. CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND
    1. For the LR wheel speed sensor, measure:
      ABS Module Ground
      G08028252
      G08028253
      C135 Ground
      Pin Circuit Measurement / Action Pin Circuit
      36 VCA04 (BU/OG)
      G08028254
      		 - Ground
      37 RCA18 (BN/GN)
      G08028255
      		 - Ground
    2. For the RR wheel speed sensor, measure:
      ABS Module Ground
      G08028256
      G08028257
      C135 Ground
      Pin Circuit Measurement / Action Pin Circuit
      42 RCA20 (BN)
      G08028258
      		 - Ground
      43 VCA06 (WH/OG)
      G08028259
      		 - Ground

    Are the resistances greater than 10, 000 ohms? 

    1. Yes: GO to 10  .
    2. No: REPAIR the affected circuit(s).
  10. CHECK FOR CORRECT ABS MODULE OPERATION
    1. Inspect the ABS module electrical connector.
    2. Repair:
      • corrosion (install new connector or terminal - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    3. Connect the ABS module electrical connector. Make sure it seats and latches correctly.
    4. Connect any disconnected wheel speed sensor electrical connectors. Make sure the electrical connector seats and latches correctly.
    5. Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.

      On vehicles not equipped with adaptive cruise control, if no TSBs  address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module .

      On vehicles equipped with adaptive cruise control, if no TSBs  address this concern, INSTALL a new ABS module and HCU. REFER to Hydraulic Control Unit (HCU) . Note ABS module and HCU are removed as an assembly.

    2. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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