Jetta Sedan L5-2.5L (BGP) (2005)
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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:
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Check the Motronic Engine Control Module (ECM) (J220) electrical harness connector T121 terminal 62 to Battery (A) (+) 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.
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If necessary, repair the wiring connection.
If no malfunctions are found in the wiring:
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Switch the ignition on.
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Using a Multimeter, check the following wiring connection for voltage.
Specified value: 12.5 V
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Switch the ignition off.
If the specified value was not obtained:
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Check the Motronic Engine Control Module (ECM) (J220) electrical harness connector T121 terminal 21 to the Power Supply Relay (terminal 15)
(J329) socket 2/87 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.
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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 resistance.
Specified value: 1.5 ohms.
If any of the specified values are not obtained:
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Check the Motronic Engine Control Module (ECM) (J220) electrical harness connector terminals to the following Ground (GND) locations for an
open circuit or a short to Battery (+).