Camshaft Adjustment Valve 1, Exhaust

Camshaft Adjustment Valve 1, Exhaust

The following procedure is used to diagnose Camshaft Adjustment Valve 1 (exhaust) (N318) which is controlled by Engine Control Module (ECM) (J623).

Special tools, testers and auxiliary items required

• Multimeter.

• Wiring diagram.

Test requirements

• Fuse (SC7) 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 (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 ] Preliminary Check

- Disconnect the Camshaft Adjustment Valve 1 (exhaust) (N318) electrical harness connector

Checking internal resistance

- Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) (N318) terminals 1 to 2 for resistance.





Specified value: 5.0 to 8.0 ohms (at approx. 20° C)

If the specified value was not obtained:

- Replace Camshaft Adjustment Valve 1 (exhaust) (N318). Refer to repair information.

If the specified value was obtained:

Checking voltage

- Switch the ignition on.

- Using a Multimeter, Check the Camshaft Adjustment Valve 1 (exhaust) (N318) electrical harness connector terminal 2 to Ground (GND) for voltage.

- Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained:

- Check the wiring connection from the Camshaft Adjustment Valve 1 (exhaust) (N318) electrical harness connector terminal 2 to the Engine Control Module (ECM) Power Supply Relay (J271) socket 2/87 for an open circuit, short circuit to Battery (+) or Ground (GND).

- Check the wiring connection for damage, corrosion, lose 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. Refer to repair information.

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

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

- Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) (N318) electrical harness connector terminal 1 to the Engine Control Module (ECM) (J623) electrical harness connector T60 for an open circuit.










Specified value: 1.5 ohms 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, lose 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 repair information.

- Assembly is performed in the reverse order of removal.

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 ] Scan Tool Testing and Procedures.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Scan Tool Testing and Procedures.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Readiness Code.