Eos (1F7) V6-3.2L (BUB) (2008)
Engine Control Module: Testing and Inspection
Voltage Supply, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The 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 procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check
Start diagnosis
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Remove the Engine Control Module (ECM) Power Supply Relay (J271).
Checking voltage
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Using a Multimeter, check the Engine Control Module (ECM) Power Supply Relay (J271) socket 4/85 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
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Check the wiring connections from the Battery to the Engine Control Module (ECM) Power Supply Relay (J271) socket 3/86 for an open circuit
or a short circuit.
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Check the wiring connections for damage, corrosion, lose 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 Engine Control Module (ECM) Power Supply Relay (J271) socket 4/85 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.
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Install the Test Box 105 Pin (VAG1598/31).