Passat L4-1.8L Turbo (AWM) (2004)
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Bridge sockets 1+48 of test box with the respective adapter cables.
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Switch on ignition:
Warning lamp must light up.
If warning lamp does not light up:
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Switch ignition off.
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Remove instrument cluster:
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Check wiring connection from Engine Control Module (ECM) to Electronic Power Control (EPC) Warning Lamp -K132-according to wiring
diagram.
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
If no malfunctions are detected in wire from Engine Control Module (ECM) to warning lamp:
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Replace Motronic Engine Control Module (ECM) -J220-.
If warning lamp lights up when ignition is switched on:
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Start engine and let run at idle:
Warning lamp must go out after a few seconds.
If the warning lamp does not go out:
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Switch ignition off.
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Remove instrument cluster
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Connect test box to control module wiring harness. connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
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Check wire connection between test box socket 48 and instrument cluster for short circuit to Ground (GND) according to wiring diagram:
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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data
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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes
If no malfunctions are detected in wire from Engine Control Module (ECM) to warning lamp:
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Replace Motronic Engine Control Module (ECM) -J220-.