Passat Sedan V6-3.6L (BLV) (2008)
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Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained:
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Check the wiring connections from fuse 3 in Fuse Panel F to the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 30
for high resistance, an open or short circuit.
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Check the wiring connections for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
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Switch the ignition on.
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Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 86 to ground.
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Switch the ignition off.
Specified value: battery voltage.
If the specification was not obtained:
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Check the wiring for an open, high resistance or short circuit to voltage or ground.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623). Refer to the Repair Information.
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Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay (J271) to the Motronic Engine Control Module
(ECM) (J623) electrical harness connector T94 for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
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Check the wiring for an open, high resistance or short circuit to voltage or ground.
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
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Replace the Motronic Engine Control Module (ECM) Power Supply Relay (J271). Refer to the Repair Information.