Camshaft Adjustment Valve 1 Intake Adjustment Valve 1 Exhaust Checking

The following procedure is used to diagnose Camshaft Adjustment Valve 1 Intake -N205 - and Camshaft Adjustment Valve 1 Exhaust -N318-

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements 

• The Camshaft Adjustment Valve 1 Intake -N205 - and Camshaft Adjustment Valve 1 Exhaust -N318- fuse OK.
• Engine Control Module (ECM) Power Supply Relay -J271- 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 .

Procedure 

-- Disconnect Camshaft Adjustment Valve 1 Intake -N205 - or Camshaft Adjustment Valve 1 Exhaust -N318- electrical harness connector.

-- Using a multimeter, check the Camshaft Adjustment Valve 1 Intake -N205 - or Camshaft Adjustment Valve 1 Exhaust -N318- for resistance.

-- Measure from pin 1 to pin 2 of the appropriate adjustment valve solenoid.

Specified value: 10.0 to 13.0 Ω (at approx. 20° C)

If the specified value was Not obtained:

-- Replace the Camshaft Adjustment Valve 1 Intake -N205 - or Camshaft Adjustment Valve 1 Exhaust -N318-.

If the specified value was obtained:

Checking voltage 

-- Switch the ignition ON.

-- Using a multimeter, Check the Camshaft Adjustment Valve 1 Intake -N205 - or Camshaft Adjustment Valve 1 Exhaust -N318- electrical harness connector terminal 1 to ground for voltage.

-- Switch the ignition OFF.

Specified value: Battery voltage.

If the specified value was Not obtained:

-- Check the wiring connection from terminal 1 to fuse 8 in Fuse Panel B for an open circuit, high resistance or short circuit to ground.

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

-- If necessary, repair the faulty wiring connection.

If the specified value was 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 (ECM) -J623-. Refer to the Repair Information.

-- Using a multimeter, Check the Camshaft Adjustment Valve 1 Intake -N205 - or Camshaft Adjustment Valve 1 Exhaust -N318- electrical harness connector terminal 2 to the Engine Control Module (ECM) harness connector for an open circuit.

Camshaft Adjustment Valve 1 Intake -N205 - electrical harness connector terminal	Engine Control Module (ECM) electrical harness connector T60 terminal or test box socket
2	20

Camshaft Adjustment Valve 1 Exhaust -N318- electrical harness connector terminal	Engine Control Module (ECM) electrical harness connector T60 terminal or test box socket
2	21

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, high resistance or short circuit to voltage or ground.

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

-- If necessary, repair the faulty wiring connection.

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

-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Assembly is performed in the reverse of the removal.

Final procedures 

After repair work, the following work steps must be performed in the mentioned 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 .