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HOMESERVICE MANUALSMAZDA2008TRIBUTE I SPORT, FWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMSYMPTOM TROUBLESHOOTING [ENGINE/FUEL - EXCEPT HYBRID]TEST 4: FUEL DELIVERY SYSTEM
2008 Mazda Tribute i Sport, FWD, Standard

Test 4: Fuel Delivery System

2008 Mazda Tribute i Sport, FWD, StandardSECTION Test 4: Fuel Delivery System
TEST 4 - FUEL DELIVERY SYSTEM

TEST 4 FUEL DELIVERY SYSTEM
STEP INSPECTION ACTION
1 CHECK SYSTEM INTEGRITY
  • Visually inspect the complete fuel delivery system, including fuel lines, connections, relays, damage to fuel tank, fuel pump, fuel pressure regulator, fuel pulse damper and fuel injector areas for leaks, looseness, cracks, kinks, pinching, or abrasion caused by a collision or mishandling.
  • Visually inspect electrical harnesses and connectors for loose pins, corrosion, abrasion, or other damage from collision or mishandling.
  • Verify vehicle has followed the maintenance schedule.
  • Verify fuel pump shutoff switch is set. See INERTIA FUEL SHUTOFF (IFS) SWITCH REMOVAL/INSTALLATION .
  • Verify battery is fully charged (12.5 volts or greater).
  • Verify electrical/fuse integrity.
  • Verify fuel level is sufficient.
  • Has any concern been found? 
 Yes REPAIR as necessary.
REPEAT the Quick Test. See PCM QUICK TEST  .
No GO to the next step.
2 CHECK FOR VOLTAGE AT FUEL PUMP HARNESS CONNECTOR
  • Verify fuel pump shutoff switch state. Follow the fuel pump shutoff switch reset procedure. See INERTIA FUEL SHUTOFF (IFS) SWITCH REMOVAL/INSTALLATION .
  • Disconnect fuel pump harness connector at the fuel pump.
  • Key ON, engine OFF (KOEO).
  • Connect IDS or equivalent tester.
  • Select diagnostic data link.
  • Select PCM.
  • Select active command modes.
  • Select output test mode.
  • Select fuel pump PID.
  • Press MODE to change to the ALL ON mode.
  • Press start to turn on fuel pump circuit.
  • Connect a multimeter between fuel pump power circuit (P/B) and fuel pump ground (B) circuit at the fuel pump harness connector.
  • Was the voltage greater than 12.5 volts? 
 Yes Exit Output Test Mode.
RECONNECT fuel pump harness connector.
RESTORE the vehicle.
GO to the next step.
No CHECK for opens and shorts in the fuel pump power and ground circuits.
RESTORE the vehicle.
3 CHECK FUEL FILTER FOR CORRECT MAINTENANCE
  • Locate and inspect the vehicle maintenance schedule and fuel filter.
  • Was the fuel filter serviced according to schedule  ?
 Yes GO to the next step.
No INSTALL a new fuel filter. See FUEL FILTER REMOVAL/ INSTALLATION .
GO to the next step.
4 CHECK FUEL PRESSURE
  • Install fuel pressure tester.
WARNING:
  • Before servicing or replacing any components in the fuel system, reduce the possibility of injury or fire by following directions in Section FUEL FILTER REMOVAL/INSTALLATION 01-14A-16 for cautions, handling and warnings.
  • Release fuel pressure.
  • Key ON, engine OFF (KOEO).
  • Connect IDS or equivalent tester.
  • Select diagnostic data link.
  • Select PCM.
  • Select active command modes.
  • Select output test mode.
  • Select fuel pump PID.
  • Press MODE to change to the ALL ON mode.
  • Press start to run the fuel pump.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.