Turn ignition on. Using LED equipped test light connected to engine ground and with all fuel injector
harness connectors disconnected, probe each fuel injector harness connector terminal No. 1. See Fig. 36
and Fig. 65 . Using ignition switch, operate starter, LED must illuminate. Repeat test at each fuel injector.
If test light does not illuminate at each fuel injector harness connector terminal No. 1, go to next step. If
test light illuminates at each fuel injector harness connector terminal No. 1, leave fuel injector harness
connectors disconnected and go to step 5 .
4. Check resistance between fuel injector harness connector terminal No. 1 that does not illuminate and fuel
pump relay. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM
WIRING DIAGRAMS. Repair as necessary.
5.
With all fuel injector harness connectors disconnected, connect LED equipped test light between fuel
injector harness connector terminals No. 1 and 2. Using ignition switch, operate starter. Test light should
flash. Repeat test at all fuel injector harness connectors. If LED test light does not flash at all fuel injector
harness connectors, go to next step. If LED test light flashes at all fuel injector harness connectors, go to
step 7 .
6. Turn ignition off. Disconnect ECM harness connector, leave ECM disconnected from test box. Connect
Test Box (VAG 1598/31) to ECM harness connector. See CONNECTING VAG TEST BOX . Using
DVOM, check resistance between the following fuel injector harness connector and VAG test box socket.
See FUEL INJECTOR HARNESS CONNECTOR/VAG TEST BOX SOCKET IDENTIFICATION
table. See Fig. 36 and Fig. 65 .
FUEL INJECTOR HARNESS CONNECTOR/VAG TEST BOX SOCKET IDENTIFICATION
Resistance should be a maximum of 1.5 ohms for each reading. Check wiring in fuel injector pin harness
connector for short circuits to one another and for short circuits to ground and B+. If resistance
measurements are okay and no short circuits exist. Replace ECM. See ENGINE CONTROL MODULE
(J220) - ME SFI CONTROL MODULE . After repairs, erase DTC memory. Verify repair. Test is
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . If any
resistance measurement is not okay, or a short circuit exists, repair circuit(s) as necessary. See appropriate
WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. After
repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST
DRIVE RELEARN PROCEDURE .
7. Check fuel pressure and fuel pressure regulator. See FUEL SYSTEMS in appropriate SYSTEM &
COMPONENT TESTING article. If fuel pressure is okay, go to next step. If fuel pressure is not okay.
harness connectors installed on fuel injectors.
NOTE:
Test light may not go out completely, but should dull and get brighter
during activation.
Cylinder
Fuel Injector Harness Connector Terminal
VAG Test Box Socket
1
2
96
2
2
89
3
2
97
4
2
88
2003 Volkswagen New Beetle GLS
2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
Helpmelearn Repair Manuals
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