3.
Read “DTC Status” parameter in DTC menu of the GDS.
Connect GDS and select “Diagnostic Trouble Codes(DTC)” mode.
Confirm that "DTC Readiness Flag" indicates "COMPLETED". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
Read “DTC Status” parameter in DTC menu of the GDS.
Is parameter displayed "History(Not Present) fault" ?
 | ▶ Fault is intermittent caused by poor connection in brake light switch line and/or HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to next step. |
Connect GDS to Data Link Connector. (DLC)
IG "ON".
Press the brake pedal.
Monitor the "Brake Light Switch" parameter on the "Current Data" menu of the GDS.
Whenever Brake pedal is pushed down, is the brake lamp switch's GDS data changed ON/OFF?
| ▶ Fault is intermittent caused by poor connection in brake light switch line and/or HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to next step. |
