GTI L4-2.0L Turbo (BPY) (2007)
Engine Control Module: Testing and Inspection
Voltage Supply, Checking
Voltage Supply, Checking
Special tools, testers and auxiliary items required
-
Multimeter.
-
Wiring diagram.
Test requirements
-
The Motronic Engine Control Module (ECM) J623 fuses 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.
Test sequence
-
Remove the Motronic Engine Control Module (ECM) Power Supply Relay J271
Checking voltage
-
Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 1/30 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
-
Check the wiring connections from the Battery to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 1/30 for an open
circuit or a short circuit.
-
Check the wiring connections for damage, corrosion, lose or broken terminals.
-
If necessary, repair the faulty wiring connection.
If the specified value was obtained:
-
Switch the ignition on.
-
Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 3/86 to Ground (GND).
Specified value: battery voltage.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
-
Install the test box.
If the manufacturers test box is not being used. Perform the following step.
-
Remove the Motronic Engine Control Module (ECM) J623.
-
Using a Multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 3/86 to the Motronic Engine Control
Module (ECM) J623 electrical harness connector T94 terminal 92 for resistance.
Motronic Engine Control
Motronic Engine Control Module (ECM)
Module (ECM) Power Supply
J623 electrical connector T94