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my Toyota Highlander Third Generation (2014-2019) has no power to the fuel pump, what could be wrong - Toyota Highlander
Home/Cars/Toyota/Highlander/Third Generation (2014-2019)/my Toyota Highlander Third Generation (2014-2019) has no power to the fuel pump, what could be wrong

my Toyota Highlander Third Generation (2014-2019) has no power to the fuel pump, what could be wrong

Toyota Highlander Third Generation (2014-2019)

Error Codes
2-4 hours
Time
medium
Difficulty
high
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
582 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and fix fuel pump power issues in Toyota Highlander (2014-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component
Fuel System
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems.
  • •Allow the fuel system to depressurize before disconnecting fuel lines to avoid fuel spray.

Symptoms

  • •No fuel pump operation (audible sound from the pump not heard during ignition)
  • •Engine cranks but does not start
  • •Check Engine light illuminated
  • •Fuel gauge may not function properly
  • •Possible loss of power to other electrical components

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Multimeter
  • •Socket set
  • •Electrical contact cleaner
  • •Torque wrench

Parts Required

  • •Fuel pump fuse
  • •Fuel pump relay
  • •Fuel pump (if found faulty)

Additional Information

Affected Component
Fuel System
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
5 items
Parts Required
3 items

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Solution
1. Preparation
  • Gather tools and parts needed.
  • Disconnect the negative battery terminal to prevent electrical shock.
  • Ensure the vehicle is on a flat surface and secure it with wheel chocks.
2. Check and Replace the Fuel Pump Fuse
  • Locate the fuse box and identify the fuel pump fuse according to the owner's manual.
  • Remove the fuse and inspect for continuity using a multimeter.
  • If blown, replace with a new fuse of the same amperage.
3. Inspect and Replace the Fuel Pump Relay
  • Locate the fuel pump relay in the fuse box or relay panel.
  • Remove the relay and test it by swapping with a similar relay (if available).
  • If faulty, replace the relay with a new one.
4. Testing Voltage at the Fuel Pump Connector
  • Reconnect the negative battery terminal.
  • Turn the ignition key to the ON position (do not start the engine).
  • Use a multimeter to check for voltage at the fuel pump connector.
  • If no voltage is present, trace back to the relay and wiring harness.
5. Inspect Wiring and Connectors
  • Visually inspect the wiring harness for fraying, cuts, or corrosion.
  • Clean any corroded connectors with an electrical contact cleaner.
  • Repair or replace damaged wiring as necessary.
6. Test the Fuel Pump Functionality
  • Locate the fuel pump assembly in the fuel tank.
  • Disconnect the fuel lines and electrical connector from the pump.
  • Apply battery voltage directly to the fuel pump terminals to check for operation.
  • If the pump operates, reassemble the components. If it does not, replace the fuel pump.