Camshaft Adjustment Valve 1, Checking

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements 

• The Camshaft Adjustment Valve 1 -N205- 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 

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

Start diagnosis 

-- Remove the engine cover. Refer to the Repair information.

-- Disconnect Camshaft Adjustment Valve 1 -N205- electrical harness connector -1-.

-- Using a multimeter, check the Camshaft Adjustment Valve 1 -N205- for resistance.

Specified value: 6.0 to 9.8 Ω

If the specified value was Not obtained:

-- Replace the Camshaft Adjustment Valve 1 -N205-. Refer to the Repair information.

If the specified value was obtained:

Checking voltage 

-- Switch the ignition ON.

-- Using a multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 1 for voltage.

-- Switch the ignition OFF.

Specified value: Battery voltage.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground. Refer to Wiring Diagrams for circuit and fuse ID.

-- 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 

-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair information.

-- Using a multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal to the Engine Control Module (ECM) electrical harness connector T60 for an open circuit. Refer to the chart below.

Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal:	Engine Control Module (ECM) electrical harness connector T60 terminal:
2	5

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring connection for an open circuit, high resistance, short circuit to Battery positive 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-. Refer to the Repair information.

-- Install the engine cover. Refer to the Repair information.

Final procedures 

After the 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 .