TT Roadster L4-2.0L Turbo (BWA) (2009)
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Main Relay (Computer/Fuel System): Testing and Inspection
Motronic Engine Control Module (ECM) Power Supply Relay (J271), checking
Motronic Engine Control Module (ECM) Power Supply Relay (J271), checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse (SA1) OK.
‹› Fuse (SA4) OK.
‹› Fuse (SC32) OK.
‹› Fuse (SD3) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, selector lever in position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Start diagnosis
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Using a Multimeter, check the following wiring connection for voltage.
Specified value: 12.5 V
If the specified value was not obtained:
-
Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 1/30 to the Generator (GEN) (C) B (+)
terminal for an open circuit or short to Ground (GND).
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Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
-
If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
Checking voltage
-
Using a Multimeter, check the following wiring connection for voltage.
Specified value: 12.5. battery voltage.
If the specified value was not obtained:
