P0461

DTC P0461: Fuel Level Sensor Circuit Range/Performance

Fuel Level Sensor Circuit Part 1:

Fuel Level Sensor Circuit Part 2:

CIRCUIT OPERATION
- The fuel level sensor output voltage is input in ECM (terminal No. 97) or PCM (terminal No. 60) .

TECHNICAL DESCRIPTION
- Branch the output voltage from the fuel level sensor circuit, and input it into ECM or PCM.
- The ECM or PCM detects the amount of fuel left in the fuel tank with this voltage, and also controls the fuel level warning light.

DESCRIPTIONS OF MONITOR METHODS
- If the change in the fuel level sensor output is found to be small through a comparison of the fuel consumption volume (obtained from the injector actuation duration) and the fuel volume in the fuel tank (obtained from the fuel level sensor), a malfunction is determined to have occurred.

MONITOR EXECUTION
- Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable

Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS

Logic Flow Chart:

Logic Flow Chart

Check Condition, Judgement Criterion
- When the fuel consumption calculated from the operation time of the injector amounts to 20 litters (5.3 gal), the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 litters (0.5 gal) or less.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel level sensor failed.
- Harness damage or connector damage in fuel level sensor circuit.
- ECM failed.
- PCM failed.

DIAGNOSIS

STEP 1. Check fuel gauge.

Q: Is the fuel gauge functioning?

YES: Go to Step 2.

NO: Refer to Chassis Electrical-Combination Meters Assembly and Vehicle Speed Sensor Equipment Diagnosis-Symptom Chart in Instrument Cluster/Carrier/Testing And Inspection/Diagnosis By Symptom - Symptom Chart

STEP 2. Check harness connector C-115 at ECM or harness connector C-118 at PCM for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 3.

NO: Repair or replace it. Then go to Step 5.

STEP 3. Check for harness damage between fuel level sensor connector D-10 (terminal No. 1) and ECM connector C-115 (terminal No. 97) or PCM connector C-118 (terminal No. 60) .

NOTE: Check harness after checking intermediate connectors C-124, C-127 and D-14. If intermediate connectors are damaged, repair or replace them. Then go to Step 5.

Q: Is the harness wire in good condition?

YES: Go to Step 4.

NO: Repair it. Then go to Step 5.

STEP 4. Check the trouble symptoms.
Check that the fuel gauge operates correctly.

Q: Does the fuel gauge operates correctly?

YES: It can be assumed that this malfunction is intermittent.
NO: Replace the ECM or PCM. Then go to Step 5.

STEP 5. Check the trouble symptoms.
Check that the fuel gauge operates correctly.

Q: Does the fuel gauge operates correctly?

YES: The inspection is complete.

NO: Retry the troubleshooting.