P0462
DTC P0462: Fuel Level Sensor Circuit Low InputFuel Level Sensor Circuit (Part 1):
Fuel Level Sensor Circuit (Part 2):
CIRCUIT OPERATION
- The fuel level sensor output voltage is input in combination meter (terminal No. 13).
TECHNICAL DESCRIPTION
- The fuel level sensor converts the rest of the fuel to a voltage.
- The combination meter sends the data regarding the rest of the fuel to the ECM [M/T] or the PCM [A/T].
- The ECM [M/T] or the PCM [A/T] checks whether this data is within a specified range.
DESCRIPTIONS OF MONITOR METHODS
A short 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 starting sequence was completed.
Judgement Criterion
- Fuel level sensor resistance has continued to be 2 ohms or less for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to MFI, Diagnostic Function -OBD-II Drive Cycle - Pattern 23. OBD-II Drive Cycle
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel level sensor failed.
- Shorted fuel level sensor circuit or connector damage.
- ECM failed. [M/T]
- PCM failed. [A/T]
DIAGNOSIS
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A
STEP 1. Check fuel gauge.
Q: Is the fuel gauge functioning?
YES : Go to Step 2.
NO : Refer to chassis electrical, Chassis Electrical -Combination Meters Assembly -Symptom Chart.
STEP 2. Check harness connector B-19 at ECM [M/T] or PCM [A/T] and harness connector D-10 at fuel level sensor (sub) for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair or replace them. Refer to general (electrical), Harness Connector Inspection Then go to Step 7.
STEP 3. Check for short circuit to ground between ECM [M/T] or PCM [A/T] connector B-19 (terminal No. 24) and fuel level sensor (sub) connector D-10 (terminal No. 1).
NOTE: Check harness after checking intermediate connector C-26. If intermediate connector is damaged, repair or replace them. Refer to general (electrical), Harness Connector Inspection. Then go to Step 7.
Q: Is the harness wire in good condition?
YES : Go to Step 4.
NO : Repair it. Then go to Step 7.
STEP 4. Check harness connector D-19 at fuel level sensor (main) for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to general (electrical), Harness Connector Inspection Then go to Step 7.
STEP 5. Check for short circuit to ground between fuel level sensor (main) connector D-19 (terminal No. 2) and fuel level sensor (sub) connector D-10 (terminal No. 1).
Q: Is the harness wire in good condition?
YES : Go to Step 6.
NO : Repair it. Then go to Step 7.
STEP 6. Check the trouble symptoms.
1. Carry out a test drive with the drive cycle pattern. Refer to MFI, Diagnostic Function -OBD-II Drive Cycle - Pattern 23. OBD-II Drive Cycle
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES : Replace the ECM or the PCM. When the ECM or the PCM is replaced, register the encrypted code. Refer to chassis electrical, Encrypted Code Registration Criteria Table. Then go to Step 7.
NO : It can be assumed that this malfunction is intermittent. Refer to general (body and chassis), How to Use Troubleshooting/Inspection Service Points -How to Cope with Intermittent Malfunctions.
STEP 7. Test the OBD-II drive cycle.
1. Carry out a test drive with the drive cycle pattern. Refer to MFI, Diagnostic Function -OBD-II Drive Cycle - Pattern 23. OBD-II Drive Cycle
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.