A6 Quattro Sedan V6-2.8L (AHA) (1998)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) sensor, checking
NOTE: Component locations
Required special tools and test equipment
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VAG 1598/22 test box
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Multimeter US 1119 (Fluke 83 or equivalent)
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VW 1594 connector test kit
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Wiring diagram
Checking
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Disconnect 3-pin harness connector from engine speed sensor.
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Connect VAG 1598/22 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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Check wiring for open circuit between ECM/test box and 3-pin harness connector.
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Connector terminal 1 to ECM/test box socket 67
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Connector terminal 2 to ECM/test box socket 63
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Connector terminal 3 to ECM/test box socket 56
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Specified value: max. 1.5 Ohms
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Check wiring for short circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
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Connector terminal 2 to ECM/test box socket 67
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Connector terminal 1 to ECM/test box socket 63
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Connector terminal 1 to ECM/test box socket 56
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Specified value: Infinity Ohms
If wiring is OK:
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Replace engine speed (RPM) sensor -G28-.
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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 "Moniters, Trips and/or Drive Cycle (Readiness Codes)/Checking Readiness Code" See: Testing and Inspection
Refer to "Moniters, Trips and/or Drive Cycle (Readiness Codes)/Generating Readiness Code See: Testing and Inspection