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Home >> Honda >> 2003 >> Odyssey EX >> Repair and Diagnosis >> Brakes >> Anti-Lock/Traction Control >> General Troubleshooting Information >> Service Check Signal (SCS) Circuit Method
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Service Check Signal (SCS) Circuit Method

  1. With the ignition switch OFF, connect the HDS to the 16P Data Link Connector (DLC) (A) under the driver's side of the dashboard.
    Fig 1: Connecting HDS To 16P DLC
    G01502752Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Short the SCS circuit to body ground using the HDS.
  3. Turn the ignition switch ON (II) without pressing the brake pedal.
    NOTE: If the brake pedal is pressed when turning the ignition switch ON (II), the system shifts to the DTC clearing mode.
  4. The blinking frequency indicates the DTC. DTCs are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the DTC. After determining the DTC, refer to the DTC Troubleshooting Index.
    NOTE: If the DTC is not memorized, the ABS or TCS indicator will go off for 3.6 seconds, and then come back on.

    The system will not indicate the DTC unless these conditions are met:

    • The TCS switch is not pushed.
    • The brake pedal is not pressed.
    • The ignition switch is turned ON (II).
    • The engine is stopped.
    • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).
    Fig 2: Example of DTC 15
    G01502753Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 3: Example of DTC 22
    G01502754Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Turn the ignition switch OFF.
  6. Disconnect the HDS from the DLC.


  1. With the ignition switch OFF, connect the HDS to the 16P Data Link Connector (DLC) (A) under the driver's side of the dashboard.
    Fig 1: Connecting HDS To 16P DLC
    G01502756Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Short the SCS circuit to body ground using the HDS.
  3. Press the brake pedal.
  4. Turn the ignition switch ON (II) while keeping the brake pedal pressed.
  5. After the ABS indicator goes off, release the brake pedal.
  6. After the ABS indicator comes on, press the brake pedal again.
  7. After the ABS indicator goes off, release the brake pedal again.

    You cannot clear the DTC unless these conditions are met:

    • The vehicle speed at 6 mph (10 km/h) or less.
    • The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).
    • The brake pedal is pressed before the ignition switch is turned ON (II).
  8. After a few seconds, the ABS indicator blinks twice and the DTC is cleared. If the indicator does not blink twice, repeat steps  1 through  7 . If the indicator stays on after the indicator blinks twice, check the DTC because a problem was detected during initial diagnosis before shifting to DTC clearing mode.
  9. Turn the ignition switch OFF.
  10. Disconnect the HDS from the DLC.
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