Camshaft Position Sensor, Checking

Special Tools And Workshop Equipment Required 

• Multimeter.
• Wiring diagram.

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 

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

Start Diagnosis 

-- Remove the engine cover with air filter.

-- Disconnect the Camshaft Position Sensor electrical harness connector.

-- Switch the ignition on.

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

Specified Value: Near 5.0 V 

-- Using a multimeter, Check the Camshaft Position (CMP) Sensor -G40- electrical harness connector terminals 2 to 3 for voltage.

Specified Value: Near 4.9 V 

-- Switch the ignition OFF.

If All Of The Specified Values Were Obtained: 

-- Replace the Camshaft Position (CMP) Sensor -G40-.

If Any Of The Specified Values Were Not Obtained: 

Checking Wiring 

-- Remove the Engine Control Module (ECM) -J623-.

-- Using a multimeter, Check the Camshaft Position (CMP) Sensor -G40- electrical harness connector to the Engine Control Module (ECM) electrical harness connector T60 for an open circuit. Refer to Appropriate System Diagrams for pin locations.

Camshaft Position (CMP) Sensor -G40- electrical harness connector terminals:	Engine Control Module (ECM) electrical harness connector T60 terminals:
1	44
2	6
3	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.

-- 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 Not Ok: 

-- Replace the Engine Control Module (ECM) -J623-.

-- Install the engine cover with air filter.

Final Procedures 

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

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