DME 7.8 DME 7.8 0 · ♦PCV valve leaks

DME 7.8 DME 7.8 0 ♦PCV valve leaks ♦Cap of oil filler neck not closed correctly or seal is damaged Affected terminals - Diagnosis/Troubleshooting Note! ♦Air leaks ahead of the oxygen sensors can lead to a fault in adaptation Check exhaust system for leaks. ♦Contrary adaptation values in connection with misfiring point to incorrectly adjusted control times check con- trol times and adjust if necessary. ♦If the fuel tank reserve light is switched on, no fault is entered. Work instruction Display OK If not OK 1 Close cap of oil filler neck properly or replace the seal 2 Check signal from MAF ♦Connect special tool 9637. 0.9 to 1.1 V. Replace MAF sensor sensor. ♦Measure voltage at pin III/23 and ground ♦Switch on the ignition. ♦Start the engine. Approx. 1,4 V 3 Check exhaust system for leaks 4 Check for air leaks in intake air system 5 Check PCV valve for leaks 6 Check fuel pressure 7 Check volume supply of fuel pump 8 Fuel injectors fouled ♦If preceding Check Points were negative, the fuel injectors may be fouled ♦Clean fuel injectors (ultrasonic cleaning device) or replace them 2469 P1130 0-117 page 3 Printed in Germany – 4, 2002 p1130