TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
Fuel Gauge Sender: Testing and Inspection
Signal From Fuel Gauge Sender -G, Testing
Signal From Fuel Gauge Sender -G, Testing
If the fuel gauge in the instrument cluster is not working properly, check whether the signal generated by the fuel level sender is being received by the
instrument cluster.
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Connect VAG 1551 scan tool. See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection
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Select "Read Measuring Value Block" function 08. See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection
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Select display group 002.
If the fuel level is displayed on scan tool VAG 1551, this means that the instrument cluster is malfunctioning and must be replaced.
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Removing instrument cluster.
If the fuel level is not displayed on scan tool VAG 1551, test the signal at the multi-pin connector on the instrument cluster.
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Connect test box VAG 1598 to the blue 32-pin connector using adapter VAG 1598/25.
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Use multimeter VAG 1526 to measure the resistance between contacts 5 and 7 (sensor Ground).
Specifications:
Fuel tank empty: approx. 54 ohms (front-wheel drive)
approx. 59 ohms (all-wheel drive)
Fuel tank full: approx. 290 ohms (front-wheel drive)
approx. 282 ohms (all-wheel drive)
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If the values do not match the specifications, test wiring between instrument cluster and fuel gauge sender -G (front-wheel drive / all-wheel drive)
or -G169- (all-wheel drive) using wiring diagram.
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If there are no open circuits or short circuits, check fuel gauge sender -G (front-wheel drive / all-wheel drive) or -G169- (all-wheel drive).
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Check sender for fuel gauge.
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If the value obtained matches the specification, the malfunction is in the instrument cluster; replace the instrument cluster.