Golf GLS L4-2.0L (AEG) (2001)
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Connect multimeter using auxiliary cables from VW1594 to measure voltage at terminals 3 + 4 (harness connector to Motronic Engine Control
Module (ECM)).
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Start engine and measure basic voltage.
Specified value: 0.400-0.500 V
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Turn off ignition.
If the specified value is not obtained:
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Check oxygen sensor wiring.
If the specified value is obtained:
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Replace oxygen sensor behind Three Way Catalytic Converter (TWC) -G130-. Refer to item 34, See: Fuel Delivery and Air Induction/Locations
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
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Display readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the
readiness code again. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking oxygen sensor wiring, oxygen sensor 2
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Remove wiper arms and plenum chamber cover.
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Connect VAG1598/22 test box to control module wiring harness.