A4 Quattro Wagon V6-2.8L (AHA) (1998)
NOTE: The values displayed in display field 3 depend on the calibration of the Throttle Position (TP) sensor and do not correspond with the actual
throttle valve opening in degrees. The maximum displayed value is 90.0° Angle
If the throttle angle value does not increase uniformly:
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Replace throttle valve control module -J338-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" See: Computers and Control Systems/Testing and
Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" See: Computers and Control Systems/Testing and
Inspection
Evaluation of display group 3
Display Group 3
Checking wiring
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Connect VAG1598/22 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting
VAG 1598/22 Test Box" See: Computers and Control Systems/Testing and Inspection
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Connect multimeter US1119 (Fluke 83 or equivalent), using adapter cables from VW1594 connector test kit.
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Measure resistance to check for short circuit between test box sockets 2 (Ground) and 75 (signal wire).
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Test box sockets 2 and 75
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Specified value: Infinity Ohms
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Switch multimeter to voltage (20 VDC) measuring range.
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Switch ignition on.
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Check wiring for short circuit to B+.
Note voltage reading if applicable (if not 0 volts).
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Switch ignition off.
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Continue test, depending on whether or not voltage was measured.
Continuation (with measured voltage)