Jetta GLX Wagon V6-2.8L (AFP) (2001)
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Connect VAG1598/31 test box to Engine Control Module (ECM) wiring harness. Engine Control Module (ECM) is not connected by this action.
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Check wiring for open circuit between test box and 4-pin harness connector to Motronic Engine Control Module (ECM) according to wiring
diagram.
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Terminal -3- + socket 68
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Terminal -4- + socket 69
Wire resistance: max. 1.5 ohms
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Check wiring at harness connector terminals -3- + -4- for short circuit to terminals -1- + -2- according to wiring diagram.
Specified value: infinity ohms
If no wiring fault is detected:
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If no malfunction is found in the wiring, replace Engine Control Module (ECM).
Heater Check
Heated Oxygen Sensor (HO2S) After Three Way Catalytic Converter (TWC), Checking
Special tools and equipment
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VAG1551 Scan Tool (ST) Or VAG1552 mobile scan tool with VAG1551/3 adapter cable
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VAG1598/31 test box
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Multimeter (Fluke 83 or equivalent)
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VW1594 adapter set
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Wiring diagram
Test requirements