13A-DTC P04B6: Fuel Filler Lid Stuck Closed

DTC P04B6: Fuel Filler Lid Stuck Closed

TECHNICAL DESCRIPTION

The ECM activates the fuel filler lid actuator by turning the fuel filler lid opener relay ON, and the fuel filler lid opens.
The ECM monitors the movement of the fuel filler lid opener actuator rod according to the fuel filler lid opener actuator switch signal.

DTC SET CONDITIONS

Check Conditions

During the refuel control mode after the fuel filler lid opener switch is depressed.
After the fuel filler lid opener relay is OFF from ON.
12V starter battery positive voltage is between 10 and 16.5 volts.

Judgment Criterion

Fuel filler lid opener actuator switch terminal voltage is less than 0.7 volt.

FAIL-SAFE AND BACKUP FUNCTION

"READY TO REFUEL" may not disappear when the driver closes the fuel filler lid. "READY TO REFUEL" disappears after about 30 minutes have elapsed or after driving for about 30 seconds.
When storing the DTC, "CLOSE FUEL LID" may display in the combination meter.

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

Failure of the fuel lid opener actuator return spring
Improper installation of the fuel filler lid or the fuel filler lid opener actuator
Fuel filler lid opener actuator failed.
Open or shorted fuel filler lid opener actuator circuit, harness damage or connector damage.
ECM failed.

note	When fuel filler lid is opened by fuel filler lid opener relay ON, the DTC may be set if movement of the fuel filler lid opener actuator or the fuel filler lid is disturbed by hand etc.

note

When the refuel control mode cannot be canceled even if fuel filler lid is closed^*, it can be canceled the refuel control mode by performing the following operations.
*: The related refuel indication on the combination meter does not disappear, the fuel tank solenoid valve does not turn off, or the power of the ECM does not turn off even if the fuel filler lid is closed.

Using scan tool (M.U.T.-IIISE), "Forced Refuel control completion" from Special Function screen is executed.
30 minutes passed after the item execution.
Drive the vehicle continuously for about 30 seconds.

DIAGNOSIS

STEP 1. Using scan tool (M.U.T.-IIISE), check data list item 213: Fuel Filler Lid Opener Actuator Switch.

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).

(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE)

(2) Operate the electric motor switch without depressing the brake pedal and turn ON (not READY) the power supply mode of electric motor switch.

(3) Set scan tool (M.U.T.-IIISE) to the data reading mode for item 213, Fuel filler lid opener actuator switch.

Output voltage should be between 0.25 and 0.56 volt when the fuel filler lid is closed.
Output voltage should be between 4.0 and 5.0 volts when the fuel filler lid is open.

(4) Turn off the power supply mode of the electric motor switch.

Is the switch operating properly?

It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

Go to Step 2.

STEP 2. Check the installation state of the fuel filler lid and the fuel filler lid opener actuator.

Refer to GROUP 42A, Fuel Filler Lid - Removal and Installation

Are the fuel filler lid and the fuel filler lid opener actuator installed correctly?

Go to Step 3.

Repair. Then go to Step 4.

STEP 3. Replace the fuel filler lid opener actuator switch (integrated in fuel filler lid opener actuator).

(1) Replace the fuel filler lid opener actuator switch (integrated in fuel filler lid opener actuator).

(2) Turn on the power supply mode of the electric motor switch and delete the DTC.

(3) Press the fuel filler lid opener switch.

(4) Read the DTC again.

(5) Turn off the power supply mode of the electric motor switch.

Is DTC P04B6 set?

Replace the ECM (Refer to Removal and Installation

). Then go to Step 4.

The inspection is complete.

STEP 4. Using scan tool (M.U.T.-IIISE), read the diagnostic trouble code (DTC).

(1) Turn on the power supply mode of the electric motor switch and delete the DTC.

(2) Press the fuel filler lid opener switch.

(3) Read the DTC again.

(4) Turn off the power supply mode of the electric motor switch.

Is DTC P04B6 set?

Retry the troubleshooting.

The inspection is complete.