DME 7.8 DME 7.8 0 · 0-84.1P0571

DME 7.8 DME 7.8 0 0-84.1P0571 Stop Light Switch – Signal Implausible Diagnosis conditions • Ignition on Possible fault cause ♦Stop light switch ♦Wiring harness Note! The DME control module receives the signals from the stop light switches via CAN bus. Affected terminals Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check stop light switch ♦Remove stop light switch 0 - 5 Ω Replace stop light ♦Measure resistance between Pin switch → End 1 and Pin 4 ♦Actuate stop light switch ∞ Ω ♦Measure resistance between Pin ∞ Ω 1 and Pin 2 ♦Actuate stop light switch 0 - 5 Ω ♦Install stop light switch Step 2. 2 Check wiring from PSM ♦Remove PSM control module 0 V. Repair wiring har- control module to stop connector ness light switch 1 for short cir- → End. ♦Measure voltage between Pin 32 cuit to B+ and ground ♦Switch on the ignition. ♦Actuate brake Battery voltage Step 3 9436 P0571 0-84.1 page 1 Printed in Germany – 6, 2002 p0571