How to Retrieve DTCs (Service Check Signal Circuit Method (Flash codes))

With the ignition switch in LOCK (0), connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

Fig 1: Identifying Data Link Connector (DLC)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
'06-09 models; make sure the HDS communicates with the vehicle and the EPS control unit. If it doesn't, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
Turn the ignition switch to LOCK (0).
Short the SCS circuit to body ground using the HDS.
Turn the ignition switch to ON (II).
The blinking frequency indicates the DTC. DTCs are indicated by a series of long and short blinks. Add the long and short blinks together to determine the DTC. After determining the DTC, refer to the DTC troubleshooting.
The system will not indicate the DTC unless these conditions are met:
- Set the front wheels in the straight ahead driving position.
- The ignition switch is turned to ON (II).
- The engine is stopped.
- The SCS circuit is shorted to body ground before the ignition switch is turned to ON (II).
Fig 2: DTC 12 And 23 Blinking Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to LOCK (0).
Disconnect the HDS from the DLC.