Golf GL L4-2.0L (AZG) (2001)
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Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
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Check for open circuits in wires between test box and connector according to wiring diagram:
Terminal 1 and test box socket 92
Terminal 2 and test box socket 83
Terminal 3 and test box socket 117
Terminal 4 and test box socket 84
Terminal 5 and test box socket 118
Terminal 6 and test box socket 91
Wire resistance: max: 1.5 Ohms
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Also check wires for short circuits to each other, to B+ and to Ground (GND). Specification: Infinity Ohms
NOTE: Use only gold-plated terminals when servicing the harness connector.
If wiring is OK:
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Check voltage supply of Engine Control Module (ECM). See: Computers and Control Systems/Testing and Inspection/Component Tests and
General Diagnostics/Engine Control Module (ECM) Voltage Supply, Checking