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Home >> Dodge and Ram >> 2002 >> Durango Base, 5.9 Z, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - JTEC >> Diagnostic Tests >> DTC P1282: Fuel Pump/System Relay Control Circuit >> Testing

DTC P1282: Fuel Pump/System Relay Control Circuit: Testing

  1. Turn the ignition on, with the engine off. With the DRBIII®, actuate the Fuel Pump Relay. Listen for clicking sound at Fuel Pump Relay in Power Distribution Center (PDC). Is the Fuel Pump Relay clicking? If yes, go to next step. If no, go to step  3.
    2. WARNING: When the engine is operating, DO NOT stand in a direct line with the fan. DO NOT put your hands near the pulleys, belts or fan. DO NOT wear loose clothing.
  2. Conditions that set DTC are not present at this time. The following list may help in identifying the intermittent condition:
    • With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set.
    • Review the DRBIII® Freeze Frame information. Attempt to duplicate condition that caused DTC to set.
    • Refer to any Technical Service Bulletin (TSB) that may apply.
    • Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
    • Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

    Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.

    3. NOTE: Check connectors. Clean/repair as necessary.
  3. Turn the ignition off. Remove the Fuel Pump Relay from the PDC. Measure the resistance between terminals No. 1 (85) and 2 (86) of the Fuel Pump Relay (component side). Is the resistance 50-90 ohms? If yes, go to next step. If no, replace the Fuel Pump Relay.
    4. NOTE: Check connectors. Clean/repair as necessary.
  4. Disconnect the PCM harness connectors. Measure the resistance of the Fuel Pump Relay Control circuit between the Fuel Pump Relay connector and the PCM harness connector. Is the resistance less than 5.0 ohms? If yes, go to next step. If no, repair the open in the Fuel Pump Relay Control circuit.
    5. NOTE: Check connectors. Clean/repair as necessary.
  5. Measure the resistance between ground and the Fuel Pump Relay Control circuit at the PCM harness connector. Is the resistance less 5.0 ohms? If yes, repair the short to ground in the Fuel Pump Relay Control circuit. If no, go to next step.
    6. NOTE: Check connectors. Clean/repair as necessary.
  6. Reconnect the PCM harness connectors. Turn the ignition on, with the engine off. Measure the voltage on the Fused Ignition Switch Output circuit in the Fuel Pump Relay connector. Is the voltage more than 10.0 volts? If yes, go to next step. If no, repair the open in the Fused Ignition Switch Output circuit.
  7. There are no possible causes remaining, replace the PCM.
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