Allroad Quattro V6-2.7L Turbo (APB) (2002)
Engine Speed Sensor: Testing and Inspection
Engine Speed (RPM) Signal, Checking
Engine Speed (RPM) Signal, Checking
NOTE: The engine speed signal is taken from terminal 37 on the Engine Control Module (ECM). The signal is used for various functions including the
RPM display in the instrument cluster.
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG1598/31 Test Box" See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
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Check wiring from test box socket 37 to instrument cluster according to wiring diagram for an open circuit.