P0461
DTC P0461: Fuel Level Sensor Circuit Range/PerformanceFuel Level Sensor Circuit Part 1:
Fuel Level Sensor Circuit Part 2:
CIRCUIT OPERATION
- The fuel level sensor drive signal is input in the PCM (terminal No. 72).
TECHNICAL DESCRIPTION
- Branch the drive signal from the fuel level sensor circuit, and input it into PCM.
- The PCM detects the amount of fuel left in the fuel tank with this signal, and also controls the fuel level warning light.
DESCRIPTIONS OF MONITOR METHODS
Detects malfunction if change of fuel level sensor output voltage is small when sum of fuel injection is large.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored)
- Not applicable
Sensor (The sensor is determined to be normal)
- Not applicable
DTC SET CONDITIONS
Logic Flow Chart:
Logic Flow Chart
Check Conditions, Judgement Criteria
- When the fuel consumption calculated from the operation time of the injector amounts to 20 liters (5.3 gal), the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 liters (0.5 gal) or less.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel level sensor failed.
- Open or shorted fuel level sensor circuit, harness damage or connector damage.
- PCM failed.
DIAGNOSIS
STEP 1. Check fuel gauge.
Q: Is the fuel gauge functioning?
YES: Go to Step 3.
NO: Go to Step 2.
STEP 2. Check for short circuit to ground between fuel level sensor connector D-13 (terminal No. 1) and PCM connector C-112 (terminal No. 72).
NOTE: Check harness after checking intermediate connectors C-118, C-122 and D-17. If intermediate connectors are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 6.
Q: Is the harness wire in good condition?
YES: Refer to Chassis Electrical - Combination Meters Assembly and Vehicle Speed Sensor - Equipment Diagnosis - Symptom Chart.
NO: Repair it. Then go to Step 6.
STEP 3. Check harness connector C-112 at PCM for damage.
Q: Is the harness connector in good condition?
YES: Go to Step 4.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then go to Step 6.
STEP 4. Check for open circuit or harness damage between fuel level sensor connector D-13 (terminal No. 1) and PCM connector C-112 (terminal No. 72).
NOTE: Check harness after checking intermediate connectors C-118, C-122 and D-17. If the intermediate connectors are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 6.
Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair it. Then go to Step 6.
STEP 5. Check the trouble symptoms.
1. Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0461 set?
YES: Replace the PCM. Then go to Step 6.
NO: It can be assumed that this malfunction is intermittent. Refer to How to Use Troubleshooting/Inspection Service Points.
STEP 6. Test the OBD-II drive cycle.
1. Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0461 is set?
YES: Retry the troubleshooting.
NO: The inspection is complete.