DME 7.8 DME 7.8 0 · 0-88.4P0646

DME 7.8 DME 7.8 0 0-88.4P0646 A/C Compressor Control – Below Limit Diagnosis conditions • Engine running • Battery positive voltage greater than 7 V • Air conditioning on Possible fault cause ♦Short circuit to ground in wiring Affected terminals Terminal IV/27 Diagnosis/Troubleshooting Work instruction Display OK If not OK 1 Check control wire for A/ ♦Remove A/C relay ∞ Ω Repair wiring har- C relay, Pin 2 (terminal → End. ness ♦Remove DME control module 85), for short circuit to → End. connector ground ♦Measure resistance between Pin 2 (terminal 85) and ground 8728 P0646 0-88.4 page 1 Printed in Germany – 6, 2002 p0646