TT Roadster L4-2.0L Turbo (BWA) (2009)
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Using a Multimeter, check the Engine Control Module (ECM) (J623) electrical harness connector terminals T94/3, T94/5, T94/6 to the Motronic
Engine Control Module (ECM) Power Supply Relay (J271) socket 2/87 for an open circuit.
Specified value: 1.5 ohms.
If the specified value was not obtained:
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Check the Engine Control Module (ECM) (J623) electrical harness connector terminals T94/3, T94/5, T94/6 to the Motronic Engine Control
Module (ECM) Power Supply Relay (J271 ) socket 2/87 for an open circuit or a short to Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
Checking Ground (GND)
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Using a Multimeter, check the following wiring connections for an open circuit.
Specified value: 1.5 ohms.
If any of the specified values are not obtained:
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Check the Engine Control Module (ECM) (J623) electrical harness connector terminals to the following Ground (GND) locations for an open
circuit or a short to Battery (+).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the wiring connection.
If no malfunctions are found in the wiring and the voltage supply was OK:
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Perform a road test to verify any electrical repairs.
If the fault does not return:
Repair complete, Generate readiness code. Refer to => [ Readiness Code ] See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness
Codes.
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End diagnosis.
If the fault does return and no malfunction is detected in the wiring and the voltage supply was OK:
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Replace the Engine Control Module (ECM) (J623 ). Refer to => [ replacing ] See: Engine Control Module/Testing and Inspection/Engine Control
Module (ECM) (J623).
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Assembly is performed in the reverse of the removal.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
