Rabbit L5-2.5L (BGQ) (2008)
Camshaft Position Sensor: Testing and Inspection
Camshaft Position Sensor, Checking
Special tools, testers and auxiliary items required
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Multimeter
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wiring diagrams
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of Camshaft Position (CMP) Sensor G40.
Test requirements
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Fuses for Engine Control Module (ECM) J623 OK.
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Battery voltage at least 12.5 volts.
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All electrical consumers such as, lights and rear window defroster, switched off.
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Vehicles with automatic transmission, shift selector lever into position "P" or "N".
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A/C switched off.
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Ground (GND) connections between engine/transmission/chassis OK.
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Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
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Pull engine cover out of first mount at front arrow 1, then at right rear arrow 2 and finally at left rear arrow 3.
CAUTION: The use of nails, paper clips, or another unauthorized materials to back-probe electrical harness connectors is strictly
prohibited and may cause damage to the electrical harness connectors, terminal ends or damage to a component. Use only the
manufacturers test lead kit or an equivalent aftermarket test lead kit for back-probing all electrical harness connectors.
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Using the low current voltage tester, check for voltage between terminal 1 and terminal 2 with the electrical harness connector connected to
Camshaft Position (CMP) Sensor G40.
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Operate the starter briefly.
The LED must blink.
NOTE: Voltage testers do not go out completely during low current pickup between activations by the ECM, but rather continue to glow a little
and then get significantly brighter during activation.
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Switch ignition off.
If the LED does not blink:
Checking voltage supply