S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
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Camshaft Position Sensor: Testing and Inspection
Note: The Camshaft Position (CMP) sensor is located on the rear of the cylinder head on early production engines and is located behind the camshaft
sprocket on late engines.
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Connect VAG 1598 Test Box to Engine Control Module (ECM) and ECM harness using VAG 1598/5 adaptor cable. Refer to VAG 1598 Pin Out
Box Connecting. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting and Testing VAG 1598 Pin Out Box
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Connect LED Tester US 1115 between terminals 8 and 12.
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Operate starter for a few seconds.
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LED tester must blink briefly during every second engine revolution.
If NOT:
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Switch ignition OFF.
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Disconnect 3-pin CMP sensor connector at the distributor housing or the sensor assemble behind the camshaft sprocket.
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Switch DVOM to resistance range.
3-Pin Connector For The Camshaft Position Sensor
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Check wires according to the wiring diagram for continuity and/or short circuit to each other, as described:
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Short circuit: 1.0 ohm maximum.
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Open circuit: infinite ohms.
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Between CMP sensor connector terminal 1 and Test Box socket 19.
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Between CMP sensor connector terminal 2 and Test Box socket 8.
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Between CMP sensor connector terminal 3 and Test Box socket 12.
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If necessary, repair open circuit and/or short circuit in wiring between CMP sensor harness connector and ECM harness connector terminals 8, 12
and 19.
If there is neither an open circuit nor a short circuit:
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Switch DVOM to 20 volt (V) range.
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Connect multimeter to terminals 12 and 19 using adapter cables from VW 1594 adaptor kit.
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Switch ignition ON.
^
Must be 4.5 - 5.5 volts.
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Switch ignition OFF.
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Connect multimeter to terminals 8 and 19.
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Switch ignition ON.
^
Must be 4.3 - 5.2 volts.
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Switch ignition OFF.
If NOT in each case:
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Replace ECM.
If YES in each case:
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Replace Camshaft Position sensor.
