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Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

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Instrument cluster<br />

Página 3 de 20<br />

90-3<br />

On Board Diagnostic (OBD),<br />

function<br />

The instrument cluster is controlled by an<br />

internal microprocessor with On Board<br />

Diagnostic (OBD) capability. If malfunctions<br />

occur in monitored sensors and<br />

components, Diagnostic Trouble Codes<br />

(DTC) will be stored in memory.<br />

If OBD recognizes instrument cluster<br />

malfunctions related to the:<br />

odometer<br />

distance impulse number (K number)<br />

speedometer calibration<br />

the trip odometer display will change to<br />

show "dEF.".<br />

In this case, replace speedometer<br />

90-8 .<br />

Page<br />

Other malfunctions recognized by OBD will<br />

not cause the trip odometer display to<br />

change as described above.<br />

However, before performing any<br />

troubleshooting or inspection, always begin<br />

by checking for DTCs using the On Board<br />

Diagnostic (OBD) program. DTCs stored in<br />

memory are retrieved/checked with VAG<br />

1551 / 1552 Scan Tools (ST) or VAS 5051 /<br />

5052 Diagnostic Testing and Information<br />

System<br />

<strong>Repair</strong> Manual, Electrical Equipment On<br />

Board Diagnostic (OBD), <strong>Repair</strong> Group 01.<br />

or<br />

VAS 5051/5052 Vehicle Diagnostic<br />

Testing and Information System in mode<br />

"Guided Fault Finding"<br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...<br />

13/2/<strong>2005</strong>

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