A4 Quattro Wagon V6-2.8L (AHA) (1998)
Continuation
If no speed was indicated:
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Connect VAG1598/22 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting
VAG 1598/22 Test Box" See: Testing and Inspection
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Connect VAG1527B LED voltage tester between ECM/test box sockets 3 (B+) and 20 (signal).
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Lift vehicle at left-front until wheel is free.
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Switch ignition on and rotate left-front wheel by hand.
LED must blink (very brief blink)
NOTES:
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The right-front wheel must not rotate; block it if necessary.
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For LEDs with little voltage consumption, the LED lights up at half strength when the ignition is switched on.
If the LED does not blink:
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Check wiring from ECM connector, terminal 20 to instrument cluster for open circuit or short circuit.
If the wiring is OK and the LED does not blink:
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Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code.
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" See: Testing and Inspection
Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code" See: Testing and Inspection