P2066

DTC P2066: Fuel Level Sensor (sub) Circuit Range/Performance

TECHNICAL DESCRIPTION

- The fuel level sensor converts the rest of the fuel to a voltage and sends it to the combination meter.
- The combination meter sends the data regarding the rest of the fuel to the ECM.
- The ECM checks whether this data is within a specified range.

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

DTC SET CONDITIONS

Logic Flow Chart






Check Condition, Judgement Criterion

- When the fuel consumption calculated from the operation time of the injector amounts to 30 litters (7.9 gal), the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 litters (0.5 gal) or less.

FAIL-SAFE AND BACKUP FUNCTION

- None

OBD-II DRIVE CYCLE PATTERN

None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

- Fuel pump module or fuel level sensor (sub) failed.
- ECM failed.

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. Using scan tool MB991958, read the diagnostic trouble code (DTC).





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)Read the DTC.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is DTC P0461 set?

YES Go to Step 2.

NO Go to Step 4.

STEP 2. Check fuel gauge.

Q. Is the fuel gauge functioning?

YES Go to Step 3.
NO Symptom Chart.
STEP 3. Check the trouble symptoms.

Check that the fuel gauge operates correctly.

Q. Does the fuel gauge operates correctly?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.
NO Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
Then go to Step 6.
STEP 4. Check the fuel level sensor (sub).

Check to see if the fuel level sensor is normal. Fuel Gauge Unit Check.

Q. Is the fuel level sensor (sub) normal?

YES Go to Step 5.
NO Replace the fuel level sensor (sub). Then go to Step 6.
STEP 5. Check the trouble symptoms.

Check that the fuel gauge operates correctly.

Q. Does the fuel gauge operates correctly?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.
NO Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
Then go to Step 6.
STEP 6. Check the trouble symptoms.

Check that the fuel gauge operates correctly.

Q. Does the fuel gauge operates correctly?

YES The inspection is complete.
NO Retry the troubleshooting.