Dtc P2119 Throttle Actuator Control Throttle Body Range / Performance

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

MONITOR DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2119)

CHECK IF DTC OUTPUT REOCCURS

DTC P2119 Throttle Actuator Control Throttle Body Range / Performance


DESCRIPTION

The Electronic Throttle Control System (ETCS) is composed of the throttle actuator that operates the throttle valve, the throttle position sensor that detects the opening angle of the throttle valve, the accelerator pedal position sensor that detects the accelerator pedal position, and the ECM that controls the ETCS system.
The ECM operates the throttle actuator to position the throttle valve for proper response to driver inputs. The throttle position sensor detects the opening angle of the throttle valve and provides this signal to the ECM so that the ECM can regulate the throttle actuator.

DTC No.
DTC Detection Condition
Trouble Areas
P2119
Throttle opening angle continues to vary greatly from target throttle opening angle (1 trip detection logic)
  1. ETCS
  1. ECM

MONITOR DESCRIPTION

The ECM determines the "actual" throttle angle based on the throttle position sensor signal. The "actual" throttle position is compared to the "target" throttle position commanded by the ECM. If the difference of these 2 values exceeds a specified limit, the ECM interprets this as a fault in the ETCS system. The ECM turns on the MIL and sets a DTC.
Start the engine, fully depress the accelerator pedal until the engine speed reaches 5,000 rpm (fully open the throttle valve), and quickly release the accelerator pedal (close the throttle valve).

FAIL-SAFE

If the ETCS has a malfunction, the ECM cuts off current to the throttle actuator. The throttle valve returns to a predetermined opening angle (approximately 16°) by the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" condition is detected and then the engine switch is turned off, the fail-safe operation will stop and the system will return to normal.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P2119 Throttle Actuator Control Throttle Body Range / Performance


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2119)

Result:

Display (DTC output)
Proceed to
P2119
A
P2119 and other DTCs
B


B
GO TO RELEVANT DTC CHART
A


2.CHECK IF DTC OUTPUT REOCCURS

  1. Clear the DTC (Click here).

  1. Allow the engine to idle for 15 seconds.

  1. Apply the parking brake and move the shift lever to the D position.

  1. Fully depress the brake pedal and the accelerator pedal for 5 seconds.

    HINT:
    Actual throttle position sensor voltage can be confirmed using the intelligent tester by entering the following menus: Powertrain / Engine / Data List / Primary / Throttle Position.
    OK:
    No DTC is output.


NG
REPLACE THROTTLE BODY
OK

NORMAL