DME 7.8 DME 7.8 0 · 0-42P0238

DME 7.8 DME 7.8 0 0-42P0238 353 Pressure Sensor - Above Limit Diagnosis conditions • Ignition on Possible fault cause ♦Short circuit to B+ ♦Open circuit ♦Pressure sensor faulty Affected terminals III/39 Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check wiring from pres- ♦Connect special tool 9637 to 0 V. Repair wiring har- sure sensor to DME con- wiring harness (DME control ness. trol module for short to module plug). B+. ♦Remove connector of pressure sensor. ♦Switch on the ignition. ♦Measure voltage between pin III/ 39 and ground. 2 Check wiring from pres- ♦Check wire from charge pres- 0 - 5 Ω sure sensor to DME con- sure sensor plug pin 4 to DME trol module for continuity. control module pin III/39 for continuity. 3 Check pressure sensor ♦Connect special tool 9637. Depending on ambi- Replace pressure voltage. ent pressure: See sensor. ♦Switch on the ignition. Figure 1. ♦Measure voltage between spe- cial tool 9637 pin III/39 and ground. ♦Or read out voltage value with the PST2. 2190 P0238 0-42 page 1 Printed in Germany – 3, 2001 p0238