Jetta L4-2.0L (AEG) (2000)
Diagnostic Trouble Codes
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing
Diagnostic Trouble Codes
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Adapt Engine Control Module (ECM) to throttle valve control module.
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Display readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the
readiness code again. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
If display remains above 90 degree angle:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
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Turn off ignition.
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Check voltage supply of throttle valve control module and wiring to control module.
If the voltage supply and wiring is OK:
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Replace Engine Control Module (ECM).
Checking voltage supply and wiring to control module
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Disconnect 8-pin harness connector from throttle valve control module.
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Connect multimeter to measure voltage at following harness connector terminals:
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Vehicles with CCS 1) : terminals -2- + -5-
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Vehicles without CCS 1) : terminals -4- + -7-
1) CCS = Cruise control system
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Turn on ignition.
Specified value: min. 4.5 V
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Turn off ignition.
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Connect multimeter to measure voltage at following harness connector terminals:
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Vehicles with CCS 1): terminals -2- + -6-
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Vehicles without CCS 1): terminals -3- + -7-
1) CCS = Cruise control system
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Turn on ignition.
Specified value: min. 9.0 V
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Turn off ignition.
If the specified values are not obtained:
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Remove wiper arms and plenum chamber cover.
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Connect VAG1598/22 test box to control module wiring harness.