TT L4-1.8L Turbo (BEA) (2004)
NOTE: Engine Control Module (ECM) calculates voltage values of angle sensors in percent relative to 5 volts and displays these percentage values. (5
volts supply voltage represents 100%).
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Observe display field 1 and 2.
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Slowly depress accelerator pedal completely.
Percent indication in display field 1 must rise uniformly. In the process, the tolerance range of 3 to 93% is not completely utilized.
Percent indication in display field 2 must decrease uniformly. The tolerance range 97 to 3% is not used completely during this.
NOTE:
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The reason why the value indicated in display field 1 climbs, while value indicated in display field 2 decreases, has to do with the fact that the
potentiometers (angle sensors) in Throttle Valve Control Module -J338- run in opposite directions.
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This means the voltage of angle sensor 1 runs from 0 to 5 volts. (The more the throttle valve is opened, the larger the voltage; percent indication
climbs).
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The voltage of angle sensor 2 runs from 5 to 0 volts. (The more the throttle valve is opened, the lower the voltage; the percentage decreases).
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Exit function "08 - Read measured value block" by pressing <- button.
If the displays are not as described:
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Check Throttle Valve Control Module -J338- voltage supply and wiring. Pay particular attention to connectors, which may be disconnected or
corroded.
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Check Throttle Position (TP) sensor 2 -G185-. See: Throttle Position Sensor/Testing and Inspection
Check voltage supply throttle valve control module
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Pull connector (2) off throttle valve control module.
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Switch ignition on.
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Connect multimeter for voltage measurement as follows:
Harness connector
Specified value
Terminal
2 + Ground (GND)
about 5 V
2 + 6
about 5 V
If specified values are not obtained:
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Check wire connections from Engine Control Module (ECM) to throttle valve control module.
Checking wire connections