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Eos (1F7) V6-3.2L (BUB) (2008)

Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Description and Operation > Page 2952

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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

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check

Start diagnosis

-

Remove the Engine Control Module (ECM) Power Supply Relay (J271).

Checking voltage

-

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:

-

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.

-

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 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.

-

Install the Test Box 105 Pin (VAG1598/31).

Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Description and Operation > Page 2952

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