P1539

P1524
Camshaft Adjustment, Bank 2.

P1539
Camshaft Adjustment, Bank 2.

Function:
In order to increase torque and improve cylinder charging, the engine is equipped with two VarioCam actuators that are incorporated in the camshaft chain tensioners.
The actuators change the position of the inlet camshafts with respect to the outlet camshafts.
The position of the inlet camshafts is checked by the camshaft position sensors.

Diagnostic Conditions:
- Time after end of starting > 200 seconds.
- Engine oil temperature > 30°C.
- Engine speed > 600 rpm.
- No fault with reference mark, camshaft position sensors and engine oil temperature.
- The camshaft adjustment actuator must be triggered.

Wiring Diagram:



Image Legend:
A. ECM relay

Diagnostic Procedure:

P1524:

P1539:

1. Check triggering wire for short to ground.
1. Connect special tool 9616.
2. Connect ohmmeter to pin 25 and ground.

Display: Infinite Ohms.

If 0 - 5 Ohms is displayed, check wiring harness for chafing and pinching damage.

2. Check B+ supply of actuator.
1. Separate connector to actuator.
2. Connect voltmeter to connector, pin 1, and ground. Switch on ignition.

Display: Battery positive voltage.

3. Check triggering wire for continuity.
1. Connect special tool 9616 to wiring harness.
2. Separate connector to actuator.
3. Connect ohmmeter to special tool 9616, pin 25 and connector, pin 2.

Display: 0 - 5 Ohms.