Camshaft Position Sensor 3, Checking

The following procedure is used to diagnose Camshaft Position (CMP) Sensor 3 -G300- which is controlled by Engine Control Module - J623-.

Special tools and workshop equipment required 

• multimeter.
• Wiring diagram.
• Diode test lamp

Test requirements 

• The Engine Control Module - 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 (GND) connections between engine/transmission/chassis OK.
• Ignition switched off.

Test procedure 

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

-- Remove the engine cover with air filter. Refer to appropriate service information.

-- Remove the sensor connector -1-

Checking activation 

-- Connect diode test lamp between terminal 2 and terminal 1.

-- Turn key on

-- Operate starter for a few Sec.

-- LED in test lamp must blink

-- Turn key off

Checking voltage 

-- Disconnect the Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector.

-- Switch the ignition on.

-- Using a multimeter, Check the Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

-- Switch the ignition off.

If the specification was not obtained:

Checking wiring 

If the manufacturers test box is being used, perform the following step.

-- Install the test box.

If the manufacturers test box is not being used, perform the following step.

-- Remove the Engine Control Module -J623-. Refer to appropriate service information.

-- Using a multimeter, check the Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector to the Engine Control Module -J623- electrical harness connector.

Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector terminals	Engine Control Module -J623- electrical harness connector terminals or test box sockets
1	T60 /26
2	T60 /59
3	T60 /52

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

-- Check the wiring connection for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK:

-- Replace Camshaft Position (CMP) Sensor 3 -G300-. Refer to.

If no malfunction is found in the wiring and voltage supply was not OK:

-- Replace the Engine Control Module -J623-. Refer to appropriate service information..

Assembly is performed in the reverse order of the removal, note the following:

Final procedures 

After repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .