P0462

DTC P0462: Fuel Level Sensor Circuit Low Input


























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 Diagnostic Function - OBD-II Drive Cycle - Pattern 23 Monitors, Trips, Drive Cycles and Readiness Codes .

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 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. 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. 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. 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 Diagnostic Function - OBD-II Drive Cycle - Pattern 23 Monitors, Trips, Drive Cycles and Readiness Codes.

(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. Immobilizer System.
Then go to Step 7.
NO It can be assumed that this malfunction is intermittent. 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 Diagnostic Function - OBD-II Drive Cycle - Pattern 23 Monitors, Trips, Drive Cycles and Readiness Codes.

(2)Check the diagnostic trouble code (DTC).

Q. Is DTC P0462 set?

YES Retry the troubleshooting.
NO The inspection is complete.