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Home >> Volkswagen >> 1999 >> Golf Wolfsburg Edition, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Brake System - OBD (A4 Platform)) >> 01 On Board Diagnostic (OBD) >> ABS ITT Mk 20 IE On Board Diagnostic (OBD) program >> Safety precautions >> Test sequence and test tables with measured values >> Checking brake light switch for ABS and ABS/EDL function

Checking brake light switch for ABS and ABS/EDL function

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Display group number 003 

There are always 4 display zones -arrows- in the measured value block. Decoding the individual values in display zones 1 to 4 can be read from the following tables.

Read measured value block 3 →
→ 1 → 2 → 3 → 4

Indicated on display

Read measured value block 3 →
0

Press C key for the next display group number entry.

If the → key is pressed, keys 0 and 8 for work sequence "Read measured value block" must be pressed again afterwards to regain entry.

Read measured value block 3 → Display group number: 003 
0       ← Indicated on display
        Vacant 
      Vacant 
    Vacant 
  Brake light switch: 
  • 0 → Brake pedal not depressed
  • 1 → Brake pedal depressed

If despite pressed foot brake a -0-, or not pressed foot brake a -1- is displayed on the V.A.G 1551 display; perform test step No. 4 of Electrical check, ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check  .
There is also a possibility that the brake light switch has not been correctly adjusted. Adjusting brake light switch. Refer to Brake light switch, adjusting  .