Camshaft Position Sensor, Checking: Notes

NOTE:

Use only gold-plated terminals when servicing terminals in harness connector of Camshaft Position (CMP) Sensor -G40-.

Special tools and workshop equipment required

Test requirements

The Engine Control Module (ECM) - J623- fuses OK.
Battery voltage at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster, switched off.
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
A/C switched off.
Ground connections between engine/transmission/chassis OK.
Ignition switched OFF.

Test procedure

-- Observe safety precautions. Refer to SAFETY PRECAUTIONS

-- Observe Clean Working Conditions. Refer to CLEAN WORKING CONDITIONS

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

-- Disconnect the Camshaft Position (CMP) Sensor -- electrical harness connector of the sensor to be tested.

-- Switch the ignition ON.

-- Using a multimeter, Check the malfunctioning Camshaft Position Sensor -G40- electrical harness connector terminals 1 to 3 for voltage.

Specified value: near 5.0 V

-- Switch the ignition OFF.

Continue test according to the following table:

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	Checking wiring
If the specified value was obtained:	Check reference signal circuit	Checking reference signal circuit