Service Check Signal (SCS) Circuit Method

With the ignition switch OFF, connect the HDS to the 16P data link connector (DLC) (A) under the driver's side of the dashboard next to the accelerator pedal.

Fig 1: Connecting HDS To 16P Data Link Connector (DLC)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Short the SCS circuit to body ground using the HDS.
Turn the ignition switch ON (II) without the brake pedal pressed.
NOTE: If the brake pedal is pressed when turning the ignition switch ON (II), the system shifts to the DTC clearing mode.
The blinking frequency indicates the DTC. DTCs are indicated by a series of long and short blinks. One long blink equals ten short blinks. Add the long and short blinks together to determine the DTC. After determining the DTC, refer to the DTC TROUBLESHOOTING .
NOTE:
- If the DTC is not memorized, the ABS indicator will go off for 3.6 seconds, and then come back on.
- If the ABS indicator stays on, troubleshoot for "ABS indicator does not go off, and no DTCs are stored" (see ABS INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED ).
The system will not indicate the DTC unless these conditions are met:
- The brake pedal is not pressed.
- The ignition switch is turned ON (II).
- The SCS circuit is shorted to body ground before the ignition switch is turned ON (II).
Example of DTC 15

Fig 2: Identifying Blinking Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch OFF.
Disconnect the HDS from the DLC.