P2066
DTC P2066: Fuel Level Sensor Circuit Range/PerformanceFuel Level Sensor Circuit Part 1:
Fuel Level Sensor Circuit Part 2:
CIRCUIT OPERATION
- The fuel level sensor signal (sub) is input in ECM (terminal No. 46).
TECHNICAL DESCRIPTION
- Branch the drive signal from the fuel level sensor circuit, and input it into ECM.
- The ECM detects the amount of fuel left in the fuel tank with this signal, and also controls the fuel level warning light.
DTC SET CONDITIONS
Check Conditions, Judgement Criteria
- When the fuel consumption calculated from the operation time of the injector amounts to 40 liters (10.5 gal), the diversity of the amount of fuel in tank calculated from the fuel level sensor is 2 liters (0.5 gal) or less.
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.
DIAGNOSIS
STEP 1. Check fuel gauge.
Q: Is the fuel gauge functioning?
YES: Go to Step 3.
NO: Go to Step 2.
STEP 2. Check for short circuit to ground between fuel level sensor (sub) connector D-10 (terminal No. 1) and ECM connector C-115 (terminal No. 74).
NOTE: Check harness after checking intermediate connectors C-113, C-122 and D-34. If intermediate connectors are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 6.
Q: Is the harness wire in good condition?
YES: Refer to Chassis Electrical - Combination Meters Assembly and Vehicle Speed Sensor - Equipment Diagnosis - Symptom Chart.
NO: Repair it. Then go to Step 6.
STEP 3. Check connector C-115 at ECM for damage.
Q: Is the connector in good condition?
YES: Go to Step 4.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then go to Step 6.
STEP 4. Check for open circuit or harness damage between fuel level sensor (sub) connector D-10 (terminal No. 1) and PCM connector C-115 (terminal No. 74).
NOTE: Check harness after checking intermediate connectors C-113, C-122 and D-34. If any of the intermediate connectors are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 6.
Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair it. Then go to Step 6.
STEP 5. Retest the system.
1. Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Procedure 6 - Other Monitor. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?
YES: Replace the ECM. Then go to Step 6.
NO: It can be assumed that this malfunction is intermittent. Refer to How to Use Troubleshooting/Inspection Service Points.
STEP 6. Perform 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. OBD-II Drive Cycle Pattern Lists
2. Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?
YES: Repeat the troubleshooting.
NO: The procedure is complete.