P0463
Fuel Gauge Unit Circuit:
DTC P0463: Fuel Level Sensor Circuit High Input
CIRCUIT OPERATION
- The fuel level sensor output voltage is input in ECM (terminal No. 97)
TECHNICAL DESCRIPTION
- Branch the output voltage from the fuel level sensor circuit, and input it into ECM
- The ECM
DESCRIPTIONS OF MONITOR METHODS
- An open circuit is detected while monitoring the fuel level sensor output.
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:
Check Conditions
- Battery positive voltage is between 11 and 16.5 volts.
- 2 seconds or more have passed since the engine staring sequence was completed.
Judgement Criterion
- Fuel level sensor output voltage has continued to be higher than 4.2 volt for 2 seconds.
OBD-II 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 connector damage.
- 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 Trouble Symptom Chart.
STEP 2. 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 P0463 set?
YES: Replace the ECM
NO: It can be assumed that this malfunction is intermittent. Refer to INTRODUCTION, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.
STEP 3. 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 P0463 set?
YES: Retry the troubleshooting.
NO: The inspection is complete.