90S Quattro (Canada) V6-2.8L (AAH) (1993)
Throttle Position Sensor: Testing and Inspection
Throttle Position Sensor
Throttle Position sensor, checking and adjusting
NOTE:
For functional testing of the Throttle Position Sensor (TPS), also see On Board Diagnostic, "Read Measuring Value Block" function 08,
display group 002. See: Testing and Inspection
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
-
Connect multimeter to measure voltage between terminals 1 (positive) and 2 (Ground); then between terminals 1 (positive) and 3 (signal wire).
^
Specified values: 4.5-5.5 volts (in each case)
If specified value is obtained:
-
Check resistance of TPS.
If one of the specified values is not obtained:
-
Check wiring to the Engine Control Module (ECM).
Checking wiring to ECM from TP sensor harness connector
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Connect VAG 1598 test box with VAG 1598/11 adapter harness to ECM. See: Testing and Inspection/Scan Tool Testing and Procedures/Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/31 Test Box
^
Adapter harness for ECM is not connected.
6-Pin Connector
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Test for continuity between throttle position sensor Ground terminal 2 and test box socket 45.
^
Specified value: maximum 1 (ohm)
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Test for continuity between throttle position sensor positive terminal 1 and test box socket 46.
^
Specified value: maximum 1 (ohm)
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Test for continuity between throttle position sensor signal wire terminal 3 and test box socket 47.
^
Specified value: maximum 1 (ohm)
If specifications are not achieved: