Volkswagen Workshop Service and Repair Manuals > Golf Mk3 > Running gear self-diagnosis for ABS | Self diagnosis, V.A.G Inspection Service | Self-diagnosis function ITT Mark 20 GI | Fault finding with fault reader V.A.G 1551 on ABS and ABS/EDL ITT Mark 20 (flow chart)

Running gear self-diagnosis for ABS

Self-diagnosis function ITT Mark 20 GI

Fault finding with fault reader V.A.G 1551 on ABS and ABS/EDL ITT Mark 20 (flow chart)

Start

Connect fault reader V.A.G 1551 and select 1-Rapid data transfer

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Control unit does not answer

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Select address word 03-Brake electronics

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Interrogate fault memory 02

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Rectify faults using fault table

No faults recognized

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Perform final control diagnosis 03

Read measured value block 08

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↓

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Replace component

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1. Perform test drive at more than 20 km/h
(13 mph)

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2. Interrogate fault memory 02 again

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3. "No faults recognized" is displayed again

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A		B								C					D
↓		↓								↓					↓
↓ ↓ ↓ ↓	Service hydraulic/mechanical parts of brake system (see Workshop Manual)							Perform electrical checks (targeted entry checks)							↓ ↓ ↓ ↓
↓		↓									↓				↓
↓		⇒	⇒	⇒	⇒	⇒	⇒	⇒	⇒		↓				↓
↓									↓		↓				↓
- 25 pin connector not connected - Perform test steps 1, 2 and 3 of electrical tests									↓ ↓ ↓ ↓ ↓		↓ ↓ ↓ ↓ ↓		1. 2.	Perform all test steps of electrical tests Service hydraulic/mechanical parts of brake system (see Workshop Manual)
			↓						↓		↓				↓
			↓						↓		↓				↓
	Further repairs:
	- Connect fault reader V.A.G 1551 and interrogate fault memory again.
	- Perform test drive at more than 20 km/h (13 mph) and perform a ABS regulation.
	- Interrogate fault memory again after test drive. The self-diagnosis is terminated if "No fault recognized" appears in display of fault reader V.A.G 1551 after performing test.
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										End

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