DTC P0461: Fuel Level Sensor "A" Circuit Range / Performance; DTC P0462: Fuel Level Sensor "A" Circuit Low; DTC P0463: Fuel Level Sensor "A" Circuit High [08/2015 - 08/2018]: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the Q1 gauge connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Q1-2 - Q1-3	Ignition switch ON	11 to 14 V

Result: 

NG 

See step  13

Result: 

OK 

See step  2

1. Inspect the fuel sender gauge assembly (Refer to INSPECTION [08/2015 - 08/2018] ).

Result: 

NG 

REPLACE FUEL SENDER GAUGE ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
5. Make sure that the Data List item "Alcohol Density Learning" is "Compl".
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Alcohol Density Estimate, Short FT and Long FT.
7. Check the data list values, and then write them down.

Result: 

NEXT 

See step  4

1. Confirm the alcohol concentration in the fuel (Refer to PROCEDURE - Step 4 ).
2. Write down the alcohol concentration in the fuel.

Result: 

NEXT 

See step  5

1. Use the following formula to calculate the difference between the learned value from step *1 and the actual alcohol concentration in the fuel from step *2.

   HINT: 

   [ (Alcohol Density Estimate / 2) - (Alcohol Concentration in Fuel / 2) ] < 10%

   RESULT
   
   

   Result	Proceed to
   Difference is 10% or more	A
   Difference is less than 10%	B

Result: 

B 

See step  12

Result: 

A 

See step  6

1. Use the following formula to calculate the difference between the learned values from step *1 and the actual alcohol concentration in the fuel from step *2.

   HINT: 

   [ ((Alcohol Density Estimate / 2) + Short FT + Long FT) - (Alcohol Concentration in Fuel / 2) ] < 35%

   RESULT
   
   

   Result	Proceed to
   Difference is 35% or more	A
   Difference is 11 to 34%	B
   Difference is 10% or less	C

Result: 

B 

See step  8

Result: 

C 

See step  10

Result: 

A 

See step  7

1. Check the fuel injection system: Refer to:

   Fuel Injection System [08/2015 - 08/2017]

   Fuel Injection System [08/2017 - 08/2018]

   HINT: 

   If the problem area cannot be determined by checking the fuel injection system, proceed to the next step.

Result: 

NEXT 

See step  10

1. Confirm the actual alcohol concentration in the fuel from step *2.
   RESULT
   
   

   Result	Proceed to
   Alcohol concentration is more than 20%	A
   Alcohol concentration is 20% or less	B

Result: 

B 

See step  11

Result: 

A 

See step  9

1. Replace the fuel with E0 gasoline (replace approximately 20 liters (5 gallons) of fuel).
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine and ECT / Utility / Fuel Density Learning Value Reset.
6. Confirm the following conditions as instructed on the screen.
   1. Ignition switch: ON
   2. Engine: stopped
   3. Battery voltage: 9 V or higher
7. After confirming, select "Next" and initialize the learned value.

   HINT: 

   If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.

8. Turn the ignition switch off and wait for at least 30 seconds.
   NOTE:

   Proceed to the next step without starting the engine after performing "Learning Value Reset".

Result: 

NEXT 

See step  11

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Utility / Learning Value Reset.
5. Confirm the following conditions as instructed on the screen.
   1. Ignition switch: ON
   2. Engine: stopped
   3. Battery voltage: 9 V or higher
6. After confirming, select "Next" and initialize the learned value.

   HINT: 

   If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.

7. Turn the ignition switch off and wait for at least 30 seconds.
8. Add at least 8 liters (2 gallons) of fuel.

   HINT: 

   Check "Fuel Remaining Volume" in the Data List and if it has a value of 85% or more, remove enough fuel so that the value decreases to less than 85% before adding fuel.

9. Turn the ignition switch to ON.
10. Enter the following menus: Powertrain / Engine and ECT / Data List / Alcohol Density learning.
11. Make sure that the Data List item "Alcohol Density Learning" is "Incmpl".

Result: 

NEXT 

See step  12

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Utility / Fuel Density Learning Value Reset.

   HINT: 

   • After clearing the learned value, the engine may become difficult to start if the concentration of alcohol in the fuel is high. Therefore, it may be necessary to crank the engine a few times before it starts.
   • If "Fuel Density Learning Value Reset" is performed after warming the engine coolant up to approximately 50°C (122°F), the engine becomes easier to start afterward.
5. Confirm the following conditions as instructed on the screen.
   1. Ignition switch: ON
   2. Engine: stopped
   3. Battery voltage: 9 V or higher
6. Press "Next".
7. When "Next" is pressed, initialization is performed automatically.
8. Turn the ignition switch off.
9. Add at least 8 liters (2 gallons) of fuel.
   NOTE:

   Add fuel immediately after resetting. (Do not start the engine before adding fuel.)

   HINT: 

   • Learning of the alcohol concentration will not be started until the ECM judges that the fuel gauge has moved after resetting. Add at least 8 liters (2 gallons) of fuel.
   • Check "Fuel Remaining Volume" in the Data List and if it has a value of 85% or more, remove enough fuel so that the value decreases to less than 85% before adding fuel.
10. Turn the ignition switch to ON.
11. Enter the following menus: Powertrain / Engine and ECT / Data List / Alcohol Density learning.
12. Make sure that the Data List item "Alcohol Density Learning" is "Incmpl".

Result: 

NEXT 

See step  12

HINT: 

If the difference between the learned value of the vehicle from step *1 and the actual alcohol concentration in the fuel from step *2 is less than 10%, it is not necessary to perform learning.

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Make sure that the Data List item "Alcohol Density Learning" is "Compl".
3. Enter the following menus: Powertrain / Engine and ECT / Data List / Alcohol Density Estimate, Short FT and Long FT.
4. Check the data list values, and then write them down.
5. Confirm the alcohol concentration in the fuel (Refer to PROCEDURE - Step 4 ).
6. Write down the alcohol concentration in the fuel.
7. Use the following formula to calculate the difference between the current learned value and the actual alcohol concentration in the fuel.

   HINT: 

   [ (Alcohol Density Estimate / 2) - (Alcohol Concentration in Fuel / 2) ] < 10%

   OK

   Result	Specified Condition
   Difference between actual alcohol concentration and Alcohol Density Estimate	Less than 10%
   Short FT and Long FT	Between -35% and 35%

Result: 

OK 

END 

Result: 

NG 

See step  3

1. Disconnect the H37 meter connector.
2. Disconnect the Q1 gauge connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H37-12 (L) - Q1-2	Always	Below 1 Ω
   H37-39 (E3) - Q1-3
   H37-40 (E1) - Body ground
   H37-12 (L) or Q1-2 - Body ground	Always	10 kΩ or higher
   H37-39 (E3) or Q1-3 - Body ground

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR