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Home >> Suzuki >> 2006 >> Verona Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0461 Through U0121 >> DTC P0464: Fuel Level Sensor Circuit Intermittent >> DTC Troubleshooting

DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Value (s) Yes No
1 Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
Is the system check complete?		 - Go to Step 2. Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
2
  1. Turn the ignition ON, with the engine OFF.
  2. Install the scan tool.
  3. Operate the vehicle within Freeze Frame conditions as noted.

Is Diagnostic Trouble Code (DTC) P0464 set?		 - Go to Step 3 Go to Diagnostic Aids .
3
  1. Disconnect the fuel pump electrical connector from the fuel pump.
  2. Using a Digital Voltmeter (DVM), measure the voltage in the signal circuit at terminal 1.

Is the voltage within the specified value?		 4 - 5 V Go to Step 4. Go to Step 6.
4 Check for a proper ground connection at the fuel tank and repair as necessary.
Is a repair necessary?		 - Go to Step 11. Go to Step 5.
5
  1. Remove the fuel pump from the fuel tank.
  2. Reconnect the fuel pump electrical connector.
  3. Monitor the fuel level sensor parameter on the scan tool while moving the fuel level sensor float from the empty position to the full position.
  4. Repeat the procedure several times.

Does the fuel level sensor value on the scan tool increase and then decrease steadily when the float is moved?		 - Go to Diagnostic Aids . Go to Step 7.
6 Check for an open or short to ground in the fuel level sensor signal circuit and repair as necessary.
Is a repair necessary?		 - Go to Step 11. Go to Step 9.
7 Check the open or short to ground in the fuel level sensor signal circuit between the fuel level sensor harness connector and the fuel level sensor, and repair as necessary.
Is the repair necessary?		 - Go to Step 11. Go to Step 8.
8 Replace the fuel pump assembly.
Is the repair complete?		 - Go to Step 11. -
9
  1. Connect the fuel pump electrical connector.
  2. Using a DVM measure the voltage in the signal circuit, at terminal A39 by back-probing the Engine Control Module (ECM) connector.

Does the DVM read within the specified value?		 4 - 5 V Go to Step 10. Go to FUEL AND TEMPERATURE GAUGE REMOVAL and FUEL AND TEMPERATURE GAUGE INSTALLATION .
10
  1. Turn the ignition OFF.
  2. Replace the ECM.

Is the repair complete?		 - Go to Step 11. -
11
  1. Using the scan tool, clear the DTCs.
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic ran and passed?		 - Go to Step 12. Go to Step 2.
12 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC Table . System OK
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