P0461
Fuel Gauge Unit Circuit:
Connectors:
DTC P0461: Fuel Level Sensor Circuit Range/Performance
CIRCUIT OPERATION
- The fuel gauge drive signal is input in ECM (terminal No. 97)
TECHNICAL DESCRIPTION
- Branch the drive signal from the fuel gauge circuit, and input it into ECM
- The ECM
DESCRIPTIONS OF MONITOR METHODS
Detect 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 below)
- Not applicable
Sensor (The sensor below is determined to be normal)
- Not applicable
Logic Flow Chart:
Check Conditions, Judgement Criteria
- When the fuel consumption calculated from the operation time of the injector amounts to 20 litter, the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 litter or less.
OBD-LL DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel level sensor failed.
- Open or shorted fuel level sensor circuit, or harness damage, or connector damage.
- ECM failed.
- 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-17 (terminal No. 2) and ECM connector C-122 (terminal No. 97)
NOTE: Check harness after checking intermediate connectors C-210, and C-25. 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 INSTRUMENT PANEL SYSTEMS - COMBINATION METERS ASSEMBLY AND VEHICLE SPEED SENSOR - TROUBLE SYMPTOM CHART.
NO: Repair it. Then go to Step 6.
STEP 3. Check connector C-122 at ECM
Q: Is the 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-17 (terminal No. 2) and ECM connector C-122 (terminal No. 97)
NOTE: Check harness after checking intermediate connectors C-210, and C-25. 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: 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.
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0461 set?
YES: Replace the ECM or PCM. Then go to Step 6.
NO: It can be assumed that this malfunction is intermittent. Refer to INTRODUCTION, 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.
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0461 set?
YES: Retry the troubleshooting.
NO: The inspection is complete.