Last Modified: 4-30-2014 6.6 C Doc ID: RM000000PFX00NX
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2119; Throttle Actuator Control Throttle Body Range / Performance; 2006 MY LX470 [05/2005 -        ]

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 Area

P2119

Throttle opening angle continues to vary greatly from target throttle opening angle (1 trip detection logic)
  • ETCS
  • 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).

MONITOR STRATEGY

Related DTCs

P2119: ETCS malfunction

Required Sensors/Components (Main)

Throttle actuator

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

System guard*

ON

*System guard is ON when the following conditions set

-

Throttle actuator

ON

Throttle actuator duty calculation

Executing

TP sensor

Fail determined

Throttle actuator current-cut operation

Not executing

Throttle actuator power supply

4 V or higher

Throttle actuator

Fail determined

TYPICAL MALFUNCTION THRESHOLDS

Either of following conditions A or B is met

-

A. Commanded closed TP - current closed TP

0.3 V or more for 1 second

B. Commanded open TP - current open TP

0.3 V or more for 0.6 seconds

FAIL-SAFE

When any of these DTCs, as well as other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 7°throttle angle by 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 allow the vehicle to continue at a minimal speed.

If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned OFF.

WIRING DIAGRAM

Refer to DTC P2102 2006 MY LX470 [05/2005 -        ]; 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103; Throttle Actuator Control Motor Circuit Low+ .

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are 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.

PROCEDURE

1.

CHECK ANY OTHER DTC OUTPUT (IN ADDITION TO DTC P2119)

(a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(b) Turn the ignition switch ON.

(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

(d) Read the DTCs.

Display (DTC output)

Proceed to

P2119

A

P2119 and other DTCs

B

HINT:

If any DTCs other than P2119 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK WHETHER DTC OUTPUT RECURS (DTC P2119)
  • (a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
  • (b) Turn the ignition switch ON.
  • (c) Turn the tester ON.
  • (d) Clear DTCS.
  • (e) Allow the engine to idle for 15 seconds.

    NOTICE:

    Exercise extreme care and take precautions at steps (f) and (g) below. Failure to do so may result in the vehicle unexpectedly rolling away.

  • (f) Securely apply the parking brake and move the gear selector lever to the D position.
  • (g) While depressing the brake pedal securely, fully depress the accelerator pedal for 5 seconds.
  • (h) On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
  • (i) Read DTCs.

    HINT:

    The output voltage of the throttle position sensor can be checked during step (g) using the intelligent tester. Variations in the output voltage indicate that the throttle actuator is in operation. To check the output voltage using the intelligent tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / THROTTLE POS #1.

    OK:

    No DTC output.

NG

REPLACE THROTTLE BODY

OK

NORMAL