Passat Sedan V6-3.6L (BLV) (2008)
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If no malfunction is found in the wiring:
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Replace the Motronic Engine Control Module (ECM) J623.
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.
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Using a Multimeter, check the Data Bus On Board Diagnostic Interface J533 electrical harness connector to the Motronic Engine Control Module
(ECM) J623 electrical harness connector T94 for resistance.
Data Bus On Board Diagnostic
Motronic Engine Control Module
Interface J533 electrical harness
(ECM) J623 electrical connector
connector terminals
T94 terminals or test box sockets
T32b/20 (Can_Bus Low)
67
T32b19 (Can_Bus High)
68
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, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
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Erase the DTC memory.
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Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive
Cycles and Readiness Codes
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End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
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Replace the Motronic Engine Control Module (ECM) J623.
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Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
End of Diagnosis
