Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Vehicle Speed Sensor "A" No Signal (P050031)

HINT:

• Various systems use the vehicle speed signal distributed from the combination meter assembly. Check all the components possibly related to the speed signal.
• A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly.

  The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.

• If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems using the speed signal will not operate normally.

HINT:

• After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

  Click here

• When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

  Click here

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
5. Turn the engine switch off and wait for at least 30 seconds.
6. Turn the engine switch on (IG) [A].
7. Turn the Techstream on.
8. Start the engine [B].
9. Drive the vehicle at 24 km/h (15 mph) or more for a total of 30 seconds or more [C].

   CAUTION:

   When performing the confirmation driving pattern, obey all speed limits and traffic laws.

10. Stop the vehicle.
11. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
12. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Input the DTC: P050031.
15. Check the DTC judgment result.

    Techstream Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [C] through [D] again.
    • [A] to [D]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

Fuel Level Sensor "A" Signal Stuck In Range (P04602A)

DESCRIPTION Refer to DTC P046012. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P04602A Fuel Level Sensor "A" Signal Stuck In Range Th ...

Idle Control System (P050500)

DESCRIPTION The idle speed is controlled by the ETCS (Electronic Throttle Control System). The ETCS is comprised of: 1) the one valve type throttle body; 2) the throttle actuator, which operates the t ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Fuel Pump Ecu(w/o Rear No. 2 Seat): Removal
REMOVAL PROCEDURE 1. REMOVE DECK BOARD ASSEMBLY Click here 2. REMOVE REAR DECK FLOOR BOX Click here 3. REMOVE REAR NO. 4 FLOOR BOARD Click here 4. REMOVE FRONT DECK FLOOR BOX Click here 5. REMOVE FUEL PUMP CONTROL ECU ASSEMBLY (a) Disconnect the 2 fuel pump control ECU assembl ...

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Canister: Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during canister (charcoal canister assembly) removal/installation are shown below. Necessary Procedures After P ...