Jetta L4-2.0L (AZG) (2004)
-
The respective fuses of Malfunction Indicator Lamp (MIL) -K83- must be OK.
Test sequence
-
Switch on ignition:emissions MIL must light up.
If emissions MIL does not light up when ignition is switched on:
-
Switch ignition off.
-
Check wire from ECM to emissions MIL as follows:
-
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/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
Vehicles with engine code AEG
-
Bridge sockets 2 + 17 of test box with the respective adapter cables.
Vehicles with engine code AVH and AZG
-
Bridge sockets 2 + 47 of test box with the respective adapter cables.
Continuation for all vehicles
-
Switch on ignition: emissions MIL must light up.
If Malfunction Indicator Lamp (MIL) does not light up:
-
Switch ignition off.
-
Remove instrument cluster.
-
Check wire connection from Engine Control Module (ECM) to Malfunction Indicator Lamp (MIL) -K83- according to wiring diagram.
-
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
-
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 Malfunction Indicator Lamp (MIL):
-
Replace Motronic Engine Control Module (ECM) -J220-.
If emissions MIL lights up when ignition is switched on:
-
Start engine and let run at idle: Emissions MIL must go out after a few seconds.
If Malfunction Indicator Lamp (MIL) does not go out:
-
Switch ignition off.
-
Remove instrument cluster.
-
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/With Generic Scan Tool/Test Box,
Connecting For Wiring Test
Vehicles with engine code AEG
-
Check wire connection between test box socket 17 and instrument cluster for short circuit to Ground (GND) according to wiring diagram.
Vehicles with engine code AVH and AZG
-
Check wire connection between test box socket 47 and instrument cluster for short circuit to Ground (GND) according to wiring diagram.