Fuel Level Sensor Circuit Range/Performance [FWD]

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 or PCM (terminal No. 72).

TECHNICAL DESCRIPTION
- Branch the output voltage from the fuel level sensor circuit, and input it into ECM or PCM .
- The ECM or the 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 sensors below are 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 liters, the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 liters 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.

STEP 2. Check harness connector C-111 at ECM or PCM for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 3.

NO: Repair or replace it. Refer to Harness Connector Inspection.

STEP 3. Check for harness damage between fuel level sensor connector D-14 (terminal No. 1) and ECM or PCM connector C-111 (terminal No. 72).

NOTE: Check harness after checking intermediate connectors C-105, C-117 and D-22. If intermediate connectors are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Is the harness wire in good condition?

YES: Replace the ECM or the PCM.

NO: Repair it.