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Home >> Land Rover >> 2000 >> Range Rover SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Motors, Relays & Solenoids >> Fuel Pump Relay Circuit >> Discovery Series II
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Discovery Series II

  1. Ensure main relay is operating properly. See Main Relay (Discovery Series II) . Remove fuel pump relay. Turn ignition on. Measure voltage between ground and fuel pump relay connector terminal No. 85. If battery voltage is present, go to next step. If battery voltage is not present, check for continuity between fuel pump relay connector terminal No. 85 and main relay connector terminal No. 87. If continuity does not exist, repair or replace engine compartment fuse/relay box.
  2. Turn ignition off. Check for continuity between fuel pump relay connector terminal No. 86 and ECM 24-pin connector C0635 terminal No. 18 (Blue/Purple wire). If continuity exists, go to next step. If continuity does not exist, repair open in Blue/Purple wire. See WIRING DIAGRAMS .
  3. Turn ignition off. Measure voltage between ground and fuel pump relay connector terminal No. 30. If battery voltage is present, go to next step. If battery voltage is not present, check fuse No. 10 (30-amp). If fuse is blown, go to next step. If fuse is okay, check for continuity in fuse/relay box circuit between fuel pump relay connector terminal No. 30 and battery voltage supply Red wire connection. If continuity does not exist, repair or replace engine compartment fuse/relay box.
  4. If fuse No. 10 (30-amp) is blown, check for a short in White/Purple wire between fuel pump relay in engine compartment fuse/relay box and fuel pump connector terminal No. 1. Perform repairs as necessary. See WIRING DIAGRAMS .
  5. Check for continuity between fuel pump relay terminals No. 1 and 2. If continuity exists, go to next step. If continuity does not exist, replace fuel pump relay.
  6. Check for continuity between fuel pump relay terminals No. 3 and 5. If continuity does not exist, go to next step. If continuity exists, replace fuel pump relay.
  7. Using a fused jumper wire, connect battery voltage to fuel pump relay terminal No. 1. Using another jumper wire, connect fuel pump relay terminal No. 2 to ground. When fuel pump relay is energized, check for continuity between fuel pump relay terminals No. 3 and 5. If continuity does not exist, replace fuel pump relay.
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