M20D-FKS ENGINE CONTROL SFI SYSTEM P046012 Fuel Level Sensor "A" Circuit Short to Battery P046014 Fuel Level Sensor "A" Circuit Short to Ground or Open
DESCRIPTION
The fuel sender gauge is located inside the fuel tank and measures the amount of fuel. The fuel sender gauge converts the fuel level in the fuel tank into a voltage value and outputs it to the combination meter assembly. The ECM determines when it is necessary to refuel the vehicle based on changes in the output value of the fuel sender gauge.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P046012 | Fuel Level Sensor "A" Circuit Short to Battery | Fuel sender gauge output voltage is higher than 4.73 V for 30 seconds or more (2 trip detection logic). | ·
Open or short in fuel sender gauge circuit ·
Fuel sender gauge assembly ·
Combination meter assembly ·
ECM |
Comes on | DTC stored | SAE: P0463 |
| P046014 | Fuel Level Sensor "A" Circuit Short to Ground or Open | Fuel sender gauge output voltage is less than 0.25 V for 30 seconds or more (2 trip detection logic). | ·
Open or short in fuel sender gauge circuit ·
Fuel sender gauge assembly ·
Combination meter assembly ·
ECM |
Comes on | DTC stored | SAE: P0462 |
MONITOR DESCRIPTION
The combination meter assembly sends fuel level sensor signals to the ECM via CAN communication. When the ignition switch is ON, if the output voltage of the fuel level sensor is less than 0.25 V or higher than 4.73 V for 30 seconds or more, the ECM will illuminate the MIL and store this DTC.
MONITOR STRATEGY
| Required Sensors/Components | Fuel level sensor |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
- HINT:
- ·
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
·When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON [A].
Turn the GTS on.
Wait 30 seconds or more [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
Read the pending DTCs.
- HINT:
- ·
If a pending DTC is output, the system is malfunctioning.
·If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P046012 or P046014.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
·When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- HINT:
-
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
Disconnect the fuel suction tube with pump and gauge assembly connector.
Disconnect the combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
except 12.3 Inch Multi-information Display Tester Connection Condition Specified Condition N27-1 (FV) - G18-14 (FV) Always Below 1 Ω N27-3 (FS) - G18-31 (FR) Always Below 1 Ω N27-2 (FE) - G18-24 (FE&B) Always Below 1 Ω N27-1 (FV) or G18-14 (FV) - Body ground and other terminals Always 10 kΩ or higher N27-3 (FS) or G18-31 (FR) - Body ground and other terminals Always 10 kΩ or higher
for 12.3 Inch Multi-information Display Tester Connection Condition Specified Condition N27-1 (FV) - G150-23 (FV) Always Below 1 Ω N27-3 (FS) - G150-7 (FR) Always Below 1 Ω N27-2 (FE) - G150-24 (FE&B) Always Below 1 Ω N27-1 (FV) or G150-23 (FV) - Body ground and other terminals Always 10 kΩ or higher N27-3 (FS) or G150-7 (FR) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Inspect the fuel sender gauge assembly.
- Result:
Proceed to OK NG
OK
NG
| *a | Component without harness connected
(Fuel Suction Tube with Pump and Gauge Assembly) |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition N27-1 (FV) - A-3 Always Below 1 Ω N27-2 (FE) - A-2 Always Below 1 Ω N27-3 (FS) - A-1 Always Below 1 Ω N27-1 (FV) or A-3 - Other terminals Always 10 kΩ or higher N27-2 (FE) or A-2 - Other terminals Always 10 kΩ or higher N27-3 (FS) or A-1 - Other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG