P0462
DTC P0462 FUEL LEVEL SENSOR "A" CIRCUIT LOW INPUTComponent Location:
GENERAL DESCRIPTION
The fuel level sensor measures the fuel level in fuel tank and its signal is used to determine if the fuel level is too high or too low to be able to accurately detect EVAP system failures.
DTC DESCRIPTION
The ECM sets DTC P0462 if ECM detects that fuel level change from maximum to minimum is less than the threshold value.
DTC Detecting Condition:
Specification:
Schematic Diagram:
MONITOR DTC STATUS
1. Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Press F4(DTAL) to select DTC information from the DTCs menu
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Read "DTC Status" parameter.
5. Is parameter displayed "History(Not Present) fault"?
NOTE:
- History (Not Present) fault: DTC occurred but has been cleared.
- Present fault: DTC Is occurring at present time.
YES: Fault is intermittent, caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO: Go to next step as below.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES: Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO: Go to next step as below
SIGNAL CIRCUIT INSPECTION
1. Check for open in signal circuit.
1. Ignition "OFF".
2. Disconnect FLS and ECM connector.
3. Measure resistance between terminals 1 of the FLS harness connector and 5 of the ECM harness connector
Specification : Approx. 0 ohms
4. Is resistance within the specification?
YES: Go to next step as below.
NO: Repair as necessary and go to "Verification of Vehicle Repair" procedure.
2. Check for short to ground in signal circuit
1. Measure resistance between terminal 1 of the FLS harness connector and chassis ground
Specification : Infinite
2. Is resistance within the specification?
YES: Go to next step as below.
NO: Repair as necessary and go to "Verification of Vehicle Repair" procedure.
COMPONENT INSPECTION
1. Ignition "OFF".
2. Disconnect FLS harness connector.
3. Measure resistance between terminals 1 and 3 of the FLS connector(Component side).
Specification:
4. Is resistance within specification?
YES: Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to Verification of Vehicle Repair" procedure.
NO: Check FLS for contamination, deterioration, or damage. Substitute with a known-good FLS and check for proper operation. If the problem is corrected, replace FLS and then go to "Verification of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
1. Return vehicle to original condition.
2. Start engine to normal operating temperature.
NOTE: Evaporative Emissions Systems (EVAP) Leak Tests can be run by the Scan TOOL The tests are automated and provide either a pass-tail result or directions to check for DTCs.
3. Install scan tool and clear DTC.
4. Perform "EVAP LEAKAGE TEST" mode referring to enable conditions as below.
NOTE:
- EVAP Leakage Test enable conditions.
- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status.
2. No relevant DTC.
3. Fuel level is below 80%.
5. Monitoring for (pending) DTC. Is the same DTC set?
YES: Go to the applicable troubleshooting procedure.
NO: System performing to specification at this time.