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 ECM (terminal No.97).
TECHNICAL DESCRIPTION
- Branch the output voltage from the fuel level sensor circuit, and input it into ECM.
- The ECM checks whether this voltage 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:
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.
Judgment Criterion
- Fuel level sensor output voltage has continued to be lower than 0.2 volt for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23. OBD-II Drive Cycle Pattern Lists
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.
DIAGNOSIS
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991911: Main Harness B
STEP 1. Check fuel gauge.
Q: Is the fuel gauge functioning?
YES: Go to Step 4.
NO: Go to Step 2.
STEP 2. Check harness connector C-117 at ECM 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 it. Then go to Step 10.
STEP 3. Check for short circuit to ground between ECM connector C-117 (terminal No.97) and fuel level sensor (sub) connector D-10 (terminal No.1).
NOTE: Check harness after checking intermediate connectors C-122, C-113 and D-34. If intermediate connectors are damaged, repair or replace them. Then go to Step 10.
Q: Is the harness wire in good condition?
YES:Refer to Chassis Electrical-Combination Meters Assembly and Vehicle Speed Sensor Equipment Diagnosis-Symptom Chart in Instrument Cluster/Carrier/Testing And Inspection/Diagnosis By Symptom - Symptom Chart
NO: Repair it. Then go to Step 10.
STEP 4. Check harness connector C-117 at ECM and harness connector D-10 at fuel level sensor (sub) for damage.
Q: Is the harness connector in good condition?
YES: Go to Step 5.
NO: Repair or replace it. Then go to Step 10.
STEP 5. Check for open circuit between fuel level sensor (sub) connector D-10 (terminal No.1) and ECM connector C-117 (terminal No.97).
NOTE: Check harness after checking intermediate connectors C-122, C-113 and D-34. If intermediate connectors are damaged, repair or replace them. Then go to Step 10.
Q: Is the harness wire in good condition?
YES: Go to Step 6.
NO: Repair it. Then go to Step 10.
STEP 6. Check harness connector C-117 at ECM and harness connector D-12 at fuel level sensor (main) for damage.
Q: Is the harness connectors in good condition?
YES: Go to Step 7.
NO: Repair or replace it. Then go to Step 10.
STEP 7. Check for short circuit to ground between fuel level sensor (main) connector D-12 (terminal No.2) and ECM connector C-117 (terminal No.95).
NOTE: Check harness after checking intermediate connectors C-122, C-113 and D-34. If intermediate connectors are damaged, repair or replace them. Then go to Step 10.
Q: Is the harness wire in good condition?
YES: Go to Step 8.
NO: Repair it. Then go to Step 10.
STEP 8. Check for short circuit to ground between fuel level sensor (sub) connector D-10 (terminal No.2) and fuel level sensor (main) connector D-12 (terminal No.2).
Q: Is the harness wire in good condition?
YES: Go to Step 9.
NO: Repair it. Then go to Step 10.
STEP 9. 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. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES: Replace the ECM. Then go to Step 10.
NO: It can be assumed that this malfunction is intermittent.
STEP 10. 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. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES: Retry the troubleshooting.
NO: The inspection is complete.