Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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Connect multimeter to terminals 1 + 2 of connector to Engine Control Module (ECM) for voltage measurement.
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Start engine, and let run at idle.
Specified value: at least 7.0 V
If specified value is obtained:
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Switch ignition off.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is not obtained:
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Connect multimeter to terminal 1 of connector to Engine Control Module (ECM) + Ground (GND) for voltage measurement.
Specified value: at least 11.0 V
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Switch ignition off.
If specified value is not obtained:
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Check voltage supply at 4-pin connector terminal 1 according to wiring diagram.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
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Check Ground (GND) activation of the respective oxygen sensor heater.
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test