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DTC P1282: Fuel Pump Relay Control Circuit: Testing

  1. Turn ignition on. Using scan tool, actuate fuel pump relay. Fuel pump relay is located in Power Distribution Center (PDC). PDC is located in engine compartment, next to battery. See Figure . If fuel pump relay clicks, go to next step. If fuel pump relay does not click, go to step  4 .
  2. Ensure ignition is on. Wiggle wiring harness from fuel pump relay to Powertrain Control Module (PCM) while actuating fuel pump relay. PCM is located on firewall in right rear corner of engine compartment. If fuel pump relay stops clicking at any time while wiggling wiring harness, repair wiring harness where wiggling caused fuel pump relay to stop clicking. If fuel pump relay does not stop clicking at any time while wiggling wiring harness, go to next step.
  3. Turn ignition off. Visually inspect related connectors and wiring harness. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, no problem is indicated at this time. Test is complete.
  4. Remove fuel pump relay from PDC. Turn ignition on. Measure voltage between ground and terminal C10 (Dark Green/Black wire) at fuel pump relay socket in PDC. See Figure . If voltage is more than 10 volts, turn ignition off and go to next step. If voltage is 10 volts or less, repair open in fused ignition switch output circuit (Dark Green/Black wire) between fuel pump relay and PDC.
  5. Using an ohmmeter, measure resistance between terminals No. 85 and 86 at fuel pump relay. See Figure . If resistance is 50-90 ohms, go to next step. If resistance is not 50-90 ohms, replace fuel pump relay.
  6. Ensure ignition is off. Disconnect PCM connectors. PCM is located on firewall in right rear corner of engine compartment. Inspect connectors for damaged pins, corrosion and loose terminals. Repair connectors as necessary. If connectors are okay, measure resistance of Brown wire between terminal C8 at fuel pump relay socket in PDC and terminal C19 at PCM C3 harness connector. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Brown wire between fuel pump relay and PCM.
  7. Measure resistance between ground and terminal C19 (Brown wire) at PCM C3 harness connector. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Brown wire between fuel pump relay and PCM.
  8. At this time, PCM is assumed to be defective. Replace PCM.
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