Inspection Procedure

1. CHECK THE DTC RECONFIRMING THAT THE NORMAL CODE IS OUTPUT. 
   1. Connect the Hi-Scan (pro) to the data link connector and turn the ignition switch ON.
   2. Verify that the normal code is output.

   Is the normal code output? 

   YES:  Go to next step.

   No:  Erase the DTC and recheck using Hi-Scan (pro).

2. CHECK THE WHEEL SPEED SENSOR CIRCUIT. 

   Refer to the DTC troubleshooting procedures, (see DTC C1200 (FL); C1203 (FR); C1206 (RL); C1209 (RR) WHEEL SPEED SENSOR OPEN OR SHORT TO GROUND )

   OK:  Go to next step.

   NG:  Repair or replace the wheel speed sensor.

3. CHECK THE STOP LAMP SWITCH CIRCUIT. 
   1. Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.
   2. Measure the voltage between terminal 18 of the ABS control module harness side connector (E37) and body ground when brake pedal is depressed.
   • Specification: approximately B+ 

   Is the voltage within specification? 

   Fig 1: Checking Stop Lamp Switch Circuit

   Courtesy of HYUNDAI MOTOR CO.

   Yes:  Go to next step.

   No:  Repair the stop lamp switch.

   Repair an open in the wire between the ABS control module and the stop lamp switch.

4. CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE. 

   Refer to the hydraulic lines. (see COMPONENTS )

   OK:  Go to next step.

   NG:  Repair the hydraulic lines for leakage.

The problem is still occurring, replace the ABS control module.