DME 7.8 DME 7.8 0 · 0-188P1570

DME 7.8 DME 7.8 0 0-188P1570 39 Immobilizer - signal implausible Diagnosis conditions • Start condition • Motronic reset Possible fault cause ♦Open circuit in wiring between DME control module and alarm system ♦Short circuit to ground or short circuit to B+ ♦Alarm system control module faulty Affected terminals - Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check signal wire for con- ♦Remove connector I of alarm 0 - 5 Ω ⇒ Step 2 tinuity system control module ⇒ Step 3 ♦Connect special tool 9637 to wiring harness (DME control module plug) ♦Measure resistance between special tool 9637 Pin I/3 and alarm system control module plug Pin I/23 2 Remove connector X 2/3 ♦Measure resistance between 0 - 5 Ω Repair wiring har- plug connection X 2/3 bushing ⇒ Step 3 ness 6 and special tool 9637 Pin I/3 → End ♦Measure resistance between plug connection X 2/3 Pin 6 and alarm system control module plug I Pin 23 9068 P1570 0-188 page 1 Printed in Germany, 2000 p1570