P1539

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.

Diagnosis conditions
- Time elapsed after start-up [>] 200 sec.
- 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.

P1524-P1539:

Wiring Diagram







Diagnosis Procedure

DTC P1524







DTC P1539







1 Check triggering wire for short to ground.

1. Connect special tool 9616.
2. Connect ohmmeter to pin 25 and ground.
Display: Infinity ohm

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

2 Check B+ supply of actuator.

1. Remove connector of actuator.
2. Connect voltmeter to connector, pin 1, and ground. Switch on the ignition.
Display: battery voltage

3 Check triggering wire for continuity.

1. Connect special tool 9616 to wiring harness (DME control module connector).
2. Remove connector of actuator.
3. Connect ohmmeter to special tool 9616, pin 25, and connector, pin 2.
Display: 0 - 5 ohms