LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Land Rover >> 2000 >> Discovery >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Computerized Engine Controls (Gems) >> Engine Control Module (ECM) >> Ground Circuits (Discovery)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ground Circuits (Discovery)

  1. Using a backprobe set, check for continuity in Black wires between ground connection and ECM Black 18-pin connector terminals No. 5, 9 and 10, individually. See Figure. See WIRING DIAGRAMS . If continuity exists, go to next step. If continuity does not exist, repair open in suspect Black wire.
  2. Start engine and allow to idle. Using a backprobe set, measure voltage between ground and ECM Black 18-pin connector terminals No. 5, 9 and 10. Voltage should be less than one volt. If voltage is greater than one volt, check for an open, corrosion or loose ground connection. See WIRING DIAGRAMS .
scientia non olet · About LEMON Manuals