GTI V6-2792cc 2.8L DOHC (AAA) (1996)
Knock Sensor: Testing and Inspection
Knock Sensor (KS) and Knock Control:
Checking:
Special tools, testers and auxiliary items:
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VAG 1551/1552 scan tool with VAG 1551/3 adapter cable.
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VAG 1598/18 test box.
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Multimeter (Fluke 83 or equivalent).
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Connector test kit VW 1594.
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Wiring diagram.
Test sequence:
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Engine running at idle.
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Connect VAG 1551/1552 scan tool and select "Engine Electronics" with address word 01. See: Testing and Inspection
Indicated on display
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Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.
Indicated on display
Press buttons -0-, -4- and -8- to input display group 045 (cylinders 1-4), or press buttons -0-, -4- and -6- to input display group 046 (cylinders Sand
6), and press -Q- button to confirm input.
Indicated on display (1-4 = display fields)
NOTE:
The check must be carried out during a test drive as the knock control is only active with an engine load exceeding 3 ms.
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Carry out a test drive and observe the knock control specifications on display (second technician necessary).
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Read the readiness code. If DTC memory has been erased, verify repair via appropriate display group See Readiness code, creating. See: Testing
and Inspection
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
Evaluating display group 045 and 046