Eos (1F7) V6-3.2L (BUB) (2008)
Trouble-free operation of the CAN-Bus requires that it have a terminal resistance. This central terminal resistance is located in the Engine Control
Module (ECM).
If the CAN-Bus communication is interrupted. Communication from the scan tool to the Engine Control Module (ECM) may not be possible.
Test procedure
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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
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Disconnect the Data Bus On Board Diagnostic Interface (J533) electrical harness connector.
‹› The Engine Control Module (ECM) (J623) must remain connected for the following step.
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Using a Multimeter, check the Data Bus On Board Diagnostic Interface (J533) electrical harness connector terminals 6 to 16 for resistance.
Specified value: 60 to 72 ohms (at approx. 20° C)
If the specified value was not obtained:
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Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
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Check the wiring connection for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
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Replace the Engine Control Module (ECM) (J623 ). Refer to => [ Engine Control Module J623, Replacing ] See: Engine Control Module/Service
and Repair/Engine Control Module J623, Replacing.
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).
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module J623, Replacing ] See: Engine Control Module/Service
and Repair/Engine Control Module J623, Replacing.
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Using a Multimeter, check the Data Bus On Board Diagnostic Interface (J533) electrical harness connector to the Engine Control Module (ECM)
(J623) electrical harness connector T121 for resistance.
Specified value: 1.5 ohms Max.
If the specified value was not obtained:
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Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
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Check the wiring connection for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.