Golf L4-2.0L (ABA) (1996)
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Check wiring between test box and 4-pin connector for open circuit according to wiring diagram.
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Terminal 1 and test box socket 33
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Terminal 3 and test box socket 14
Resistance: maximum 1.5 Ohms
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Check wiring between test box and 4-pin connector terminal 3 for short circuit to terminal 1 or to Ground (GND), according to wiring diagram.
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Terminal 3 and test box socket 33
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Terminal 3 and vehicle Ground (GND)
Specification: Infinity Ohms
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Additionally, check both wires for short circuit to battery Positive (B+).
Specification: Infinity Ohms
If no malfunction in wiring is detected:
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Perform resistance measurement at ECT sensor -G62- terminals 1 and 3, resistance values.
Resistance Graph
The diagram applies to 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 shows 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, repair must be verified via appropriate display group See, Readiness code, creating.
Refer to "On-Board Diagnostics II With VAG 1551". See: Powertrain Management/Computers and Control Systems/Testing and Inspection