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Diagnostic Trouble Codes Troubleshooting

DTC TROUBLESHOOTING

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 Is DTC P0463 displayed?  Go to "DTC P0463: FUEL LEVEL SENSOR CIRCUIT HIGH INPUT :". Go To Step 3.
3 Do you have SUZUKI scan tool?  Go To Step 4. Go To Step 5.
4 Fuel level sensor output signal check with SUZUKI scan tool 
  1. Connect SUZUKI scan tool to DLC with ignition switch turned OFF.
  2. Turn ON ignition switch and check fuel level displayed on scan tool.
  3. Add fuel of 3.7 liters, 1 gal, 7.8 US pt. to fuel tank and recheck fuel level on scan tool.

Is fuel level in Step 3) higher than that in Step 2)? 		 Intermittent trouble or faulty ECM.
Check for intermittent referring to "INTERMITTENT AND POOR CONNECTION INSPECTION ."		 Go To Step 6.
5 Fuel level sensor output signal check 
  1. Disconnect connectors from ECM with ignition switch turned OFF.
  2. Remove ECM from vehicle body referring to "ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION and then connect connectors to ECM.
  3. Turn ON ignition switch and measure voltage between "G04-17" terminal of ECM connector and vehicle body ground.
  4. Turn OFF ignition switch.
  5. Add fuel of 3.7 liters, 1 gal, 7.8 US pt. to fuel tank.
  6. Measure voltage between "G04-17" terminal of ECM connector and vehicle body ground with ignition switch turned ON.

Is voltage in Step 6) lower than that in Step 3)? 		 Intermittent trouble or faulty ECM.
Check for intermittent referring to "INTERMITTENT AND POOR CONNECTION INSPECTION ."		 Go To Step 6.
6 Fuel level sensor circuit resistance check 
  1. Turn OFF ignition switch and then disconnect connectors from combination meter referring to COMBINATION METER REMOVAL AND INSTALLATION .
  2. Disconnect connectors from ECM.
  3. Measure resistance between "G04-17" terminal of ECM connector and vehicle body ground.

Is resistance within 10- 140 Ω? 		 Go To Step 8. Go To Step 7.
7 Fuel level sensor circuit resistance check 
  1. Measure resistance between "G04-17" terminal of ECM connector and "YEL" wire terminal of combination meter.

Is resistance below 5 Ω? 		 Go To Step 8. Open or high resistance wire in "YEL" circuit.
8 Fuel level sensor output signal circuit check for short 
  1. Remove fuel tank referring to FUEL TANK REMOVAL AND INSTALLATION and then disconnect connector from fuel pump.
  2. Turn ON ignition switch and measure voltage between "G04-17" terminal of ECM connector and vehicle body ground.

Is voltage 0 V? 		 Go To Step 9. "YEL" or "YEL/RED" wire shorted to power supply or other circuits.
9 Fuel level sensor output signal circuit check for short 
  1. Turn ignition switch to OFF position.
  2. Measure resistance between "G04-17" terminal of ECM connector and vehicle body ground.

Is resistance infinity? 		 Go To Step 10. "YEL" or "YEL/RED" wire shorted to ground or other circuits.
10 Fuel level sensor output signal circuit check for combination meter 
  1. Connect connectors to combination meter.
  2. Turn ON ignition switch, measure voltage between "G04-17" terminal of ECM connector and body ground.

Is voltage 10 - 14 V? 		 Go To Step 11. Faulty combination meter.
11 Fuel level sensor output signal circuit check for resistance 
  1. Measure resistance between "YEL" wire terminal of combination meter and "YEL/RED" of fuel pump harness connector.

Is resistance below 5 Ω? 		 Go To Step 12. High resistance wire in "YEL" or "YEL/RED" circuit between fuel level sensor and combination meter.
12 Check fuel level sensor 
  1. Check fuel level sensor referring to FUEL LEVEL SENSOR INSPECTION .

Is it in good condition? 		 Faulty ECM Substitute a known-good ECM and recheck. Faulty fuel level sensor.
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