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Home >> Suzuki >> 2006 >> Grand Vitara Premium, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine General Information And Diagnosis >> Diagnostic Information And Procedures >> DTC P0462/P0463: Fuel Level Sensor Circuit Low/High >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  Fuel level sensor performance check 
  1. Check fuel level sensor (main and sub) for performance referring to FUEL LEVEL SENSOR INSPECTION .

Is it in good condition? 		 Substitute a known-good ECM and recheck. Replace main and/or sub fuel level sensor.
3  Wire harness check 
  1. Disconnect connectors from ECM with ignition switch turned OFF.
  2. Check for proper terminal connection to fuel level sensor (main and sub) and ECM connectors.
  3. If connections are OK, check that fuel level sensor circuit is as follows.
    • Wiring harness resistance of fuel level sensor (main and sub) circuit is less than 3Ω.
    • Insulation resistance of fuel level sensor (main and sub) circuit is infinity between fuel level sensor (main and sub) connector and vehicle body ground.
    • Insulation resistance of wire harness is infinity between fuel level sensor (main and sub) terminal and each other terminal at fuel level sensor connector.
    • Circuit voltage of fuel level sensor (main and sub) circuit is 0 - 1 V with ignition switch turned ON.

Are they in good condition? 		 Substitute a known-good ECM and recheck. Repair or replace defective wire harness.
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