A8 Sedan V8-3.7L (AEW) (1997)
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Connect multimeter US1119 (Fluke 83 or equivalent) and measure resistance across sensor terminals 1 and 2, using adapter cables from VAG1594
connector test kit.
Specified resistance value (vs. temperature)
If resistance is outside specified range:
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Replace ECT sensor.
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Check readiness code. If DTC memory has been erased, generate new readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Code)/Checking, Readiness Code" See: Computers and Control Systems/Testing and
Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Code)/Generating, Readiness Code" See: Computers and Control Systems/Testing and
Inspection
If resistance is OK:
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Connect VAG1598/19 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG1598/19
Test Box, Connecting" See: Computers and Control Systems/Testing and Inspection
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Disconnect ECT sensor harness connector.