Golf GTI V6-2792cc 2.8L DOHC (AAA) SFI (1998)
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Check wiring between test box and 2-pin connector for open circuit according to wiring diagram.
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Terminal 1 and test box socket 14.
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Terminal 2 and test box socket 33.
Resistance: max. 1.5 ohms.
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Check wire between ECM connector and 2-pin connector terminal 2 for short circuit to wire terminal 1 and to vehicle Ground (GND), according
to wiring diagram.
Terminal 2 and test box socket 14
Specification: infinite ohms.
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Additionally, check both wires for short circuit to battery positive (B+).
Specification: infinite ohms.
If no malfunction in wire is detected:
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Perform resistance measurement at ECT sensor -G62- terminals 1 and 2, resistance values See Fig. 1.
Fig. 1 Resistance graph
The diagram is valid for Engine Coolant Temperature (ECT) sensor -G62- and Intake Air Temperature (IAT) sensor -G72-.
Scale A shows resistance values for temperature range 0°-50°C (32°-122°F) and scale B the values for temperature range 50°-100°C (122°-212°F).
Examples:
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30°C (86°F) corresponds to a resistance from 1500-2000 ohms.
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80°C (176°F) corresponds to a resistance from 275-375 ohms.
If the specification is not attained:
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Replace ECT sensor -G62-.
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Read the readiness code. If DTC memory has been erased, verify repair via appropriate display group See Readiness code, creating. See:
Powertrain Management/Computers and Control Systems/Testing and Inspection