DME 7.8 DME 7.8 0 · 0-151P1341

DME 7.8 DME 7.8 0 0-151P1341 174 Camshaft Adjustment, Bank 1 – Signal Implausi- ble Diagnosis conditions • Time elapsed after start-up greater than 5 seconds • Engine temperature greater than -10 °C • Engine speed between 680 rpm and 6.760 rpm • No fault in camshaft adjustment output stage • Reference mark OK • No fault in camshaft position sensors • No fault in engine temperature Possible fault cause Note! Camshaft does not reach early or late position ♦Dirt in system ♦Solenoid hydraulic valve mechanically blocked Affected terminals Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check solenoid hydraulic ♦Remove connector on solenoid See Figure 2 Replace solenoid valve camshaft adjust- hydraulic valve Step 2 hydraulic valve ment →End ♦Connect special tool 9675 to the solenoid hydraulic valve and to a power supply. ♦Connect oscilloscope or engine tester to the special tool 9675 ♦Set 12 V ♦See Figure 1. ♦Set switch on special tool 9675 to 1 1536 P1341 0-151 page 1 Printed in Germany – 4, 2002 p1341