DME 7.8 DME 7.8 0 · 0-38.11P0234

DME 7.8 DME 7.8 0 0-38.11P0234 Boost Pressure Characteristic, Upper Value Exceeded - Above Limit Diagnosis conditions • Charge pressure control active Possible fault cause ♦Leakage at pressure hoses from frequency valve to the bypass flaps ♦Frequency valve faulty ♦Vacuum modulators for bypass flaps leaking ♦Bypass flaps incorrectly adjusted Affected terminals Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check frequency valve Replace frequency valve 2 Check pressure hoses for Replace pressure leaks hoses or eliminate leaks 3 Check vacuum modula- Replace vacuum tors for bypass flaps for modulators leaks 4 Check adjustment of Adjust bypass flaps bypass flaps 2102 P0234 0-38.11 page 1 Printed in Germany – 6, 2002 p0234