TT Roadster L4-1.8L Turbo (AWP) (2003)
Malfunction Indicator Lamp: Testing and Inspection
With Generic Scan Tool
Check Electronic Power Control (EPC) Warning Lamp in instrument cluster
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirement
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The respective fuses of Electronic Power Control (EPC) Warning Lamp -K132- must be OK.
Test sequence
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Switch on ignition:
Warning lamp must light up.
If warning lamp does not light up when ignition is switched on:
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Switch ignition off.
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Check wire from Engine Control Module (ECM) to MIL as follows:
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Connect test box to control module wiring harness, connect test box for wiring test. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test
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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: Testing and Inspection/Scan Tool
Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Audi Drive Cycle/Readiness Code/With
Generic Scan Tool/Readiness Code, Generating
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: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/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: Testing and Inspection/Scan Tool
Testing and Procedures/Scan Tool Testing/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
-
Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes/Audi Drive Cycle/Readiness Code/With
Generic Scan Tool/Readiness Code, Generating
If no malfunctions are detected in wire from Engine Control Module (ECM) to warning lamp:
-
Replace Motronic Engine Control Module (ECM) -J220-.