A4 Quattro Sedan V6-2.8L (ACK) (1997)
Throttle Position Sensor: Testing and Inspection
Checking Voltage Supply
CHECKING BATTERY POSITIVE VOLTAGE (B+) SUPPLY
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Disconnect harness connector from TPS.
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Switch ignition on.
6-Pin Connector
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Connect multimeter to measure voltage between terminals 1 (positive) and 2 (Ground); then between terminals 1 (positive) and 3 (signal wire).
Specified Value: 4.5-5.5 volts.
If neither specified value is obtained:
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Check TP sensor resistance.
If one of the specified values is not obtained, check ECM wiring as follows:
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Connect VAG 1598/19 test box to ECM harness connector.
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Check Ground (GND) wire for continuity between TP sensor connector terminal 2 and test box socket D12.
Specified Value: max. 1 Ohms.
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Check B+ wire for continuity between TP sensor connector terminal 1 and test box socket A3.
Specified Value: max. 1 Ohms.
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Check signal wire for continuity between TP sensor connector terminal 3 and test box socket A24.
Specified value: max. 1 ohm.
If the specified value is not obtained:
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Determine open or short circuit in wiring using wiring diagram; repair as necessary.
TERMINAL ASSIGNMENTS:
6-pin TP sensor:
ECM connector A
1
A3
3
A24