DME 7.8 DME 7.8 0 · 0-18.4P0125

DME 7.8 DME 7.8 0 0-18.4P0125 Engine Temperature - Open Circuit Diagnosis conditions • A fault is recorded after a debounce time of 0.4 seconds if an engine temperature of less than -45 °C is measured. Possible fault cause ♦Wiring ♦Temperature sensor faulty ♦DME control module faulty Affected terminals Terminal III/22 and III/17 Resistance values 0 °C 5.0 -7.0 kΩ 20 °C 2.0 -3.0 kΩ 60 °C 0,4 -0,8 kΩ Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check temperature sen- ♦Remove plug connection in Approx. 2 - 3 kΩ Replace tempera- sor. engine compartment Step 2 ture sensor → End ♦Measure resistance between temperature sensor Pin 1 and Pin 4 2 Check output voltage of ♦Connect special tool 9637. Do Approx. 5 V Step 3. DME control module not connect connector III of vehi- → End cle wiring harness. ♦Measure voltage between Pin III/ 22 and III/17 ♦Ignition on 2462 P0125 0-18.4 page 1 Printed in Germany – 6, 2002 p0125