- DTC judgment completed
- System normal
Lexus NX: Throttle Actuator Control Throttle Body Range / Performance (P2119)
Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Throttle Actuator Control Throttle Body Range / Performance (P2119)
DESCRIPTION
The electronic throttle control system is composed of the throttle actuator, throttle position sensor, and ECM. The ECM operates the throttle actuator to regulate the throttle valve in response to a request from the hybrid system. The throttle position sensor detects the opening angle of the throttle valve, and provides the ECM with feedback so that the throttle valve can be appropriately controlled by the ECM.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2119 | Throttle Actuator Control Throttle Body Range / Performance | The throttle valve opening angle continues to vary greatly from the target opening angle (1 trip detection logic). |
| Comes on | DTC stored |
MONITOR DESCRIPTION
The ECM determines the actual opening angle of the throttle valve from the throttle position sensor signal. The actual opening angle is compared to the target opening angle commanded by the ECM. If the difference between these two values is outside the standard range, the ECM interprets this as a malfunction in the electronic throttle control system. The ECM then illuminates the MIL and stores this DTC.
MONITOR STRATEGY
| Related DTCs | P2119: Electronic throttle control system malfunction |
| Required Sensors/Components (Main) | Throttle actuator (throttle body with motor assembly) |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Continuous |
| Duration | 1 second: Closed 0.6 seconds: Open |
| MIL Operation | Immediate |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever the following DTCs are not stored | None |
| System guard* judge condition | On |
| *: System guard is on when the following conditions are met | - |
| Throttle actuator | On |
| Throttle actuator duty calculation | Executing |
| Throttle position sensor fail | Not detected |
| Throttle actuator current-cut operation | Not executing |
| Throttle actuator power supply | 4 V or higher |
| Throttle actuator fail | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
| Either of the following conditions is met | A or B |
| A. Difference between commanded closed throttle position and current closed throttle position | 0.3 V or higher |
| B. Difference between commanded open throttle position and current open throttle position | 0.3 V or higher |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) and turn the Techstream on [A].
-
Put the engine in inspection mode (maintenance mode).
Click here
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- Start the engine.
- Idle the engine for 20 seconds.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
-
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.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P2119.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, fully depress and release the accelerator pedal 3 times, and then check the DTC judgment result [C].
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
FAIL-SAFE
When this DTC or other DTCs relating to Electronic Throttle Control System (ETCS) malfunctions are stored, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator, and the throttle valve is returned to a 5.5° throttle valve opening angle by the return spring. The ECM stops the engine and the vehicle can be driven using solely the hybrid system. 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 power switch is then turned off.
WIRING DIAGRAM
Refer to DTC P2102.
Click here
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
-
Refer to "Data List / Active Test" [Throttle Position Commanded, Throttle Position No.1, Throttle Motor Current, Throttle Motor Duty (Open) and Throttle Motor Duty (Close)].
Click here
- Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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 DTCS OUTPUT (IN ADDITION TO DTC P2119) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes| Result | Proceed to |
|---|---|
| DTC P2119 is output | A |
| DTC P2119 and other DTCs are output | B |
HINT:
If any DTCs other than P2119 are output, troubleshoot those DTCs first.
| B | .gif) | GO TO DTC CHART |
|
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| 2. | READ VALUE USING TECHSTREAM (THROTTLE POSITION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Click here
(e) Turn the power switch off and wait for at least 30 seconds.
(f) Turn the power switch on (READY).
(g) Turn the Techstream on.
(h) Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No.1 and Throttle Position Command.
Powertrain > Engine and ECT > Data List| Tester Display |
|---|
| Throttle Position No.1 |
| Throttle Position Command |
(i) Read the values displayed on the Techstream while fully depressing and releasing the accelerator pedal quickly.
| Result | Proceed to |
|---|---|
| Throttle Position No.1 does not change | A |
| Throttle Position No.1 changes even a little | B |
HINT:
When this DTC is output, the system changes to fail-safe mode. Therefore, only use the data up until the time the DTC is stored for confirmation.
| B | | GO TO STEP 4 |
|
| 3. | INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR) |
(a) Inspect the throttle body with motor assembly.
Click here
| NG | | GO TO STEP 7 |
|
| 4. | INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (VISUALLY CHECK THROTTLE VALVE) |
(a) Check for contamination between the throttle valve and housing. If necessary, clean the throttle body with motor assembly. Also, check that the throttle valve moves smoothly.
OK:
Throttle valve is not contaminated with foreign matter and moves smoothly.
HINT:
Perform "Inspection After Repair" after cleaning the throttle body with motor assembly.
Click here
| NG | | GO TO STEP 7 |
|
| 5. | READ VALUE USING TECHSTREAM (THROTTLE POSITION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Click here
(e) Turn the power switch off and wait for at least 30 seconds.
(f) Turn the power switch on (IG).
(g) Turn the Techstream on.
(h) Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Position No.1, Throttle Position No.2 and Throttle Position Command.
Powertrain > Engine and ECT > Data List| Tester Display |
|---|
| Throttle Position No.1 |
| Throttle Position No.2 |
| Throttle Position Command |
(i) Read the values displayed on the Techstream while wiggling the ECM wire harness.
(j) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(k) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes| Result | Proceed to |
|---|---|
| Value in Data List changes when wire harness is wiggled, or DTCs are output | A |
| Other than above | B |
| B | | GO TO STEP 8 |
|
| 6. | REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - THROTTLE BODY WITH MOTOR ASSEMBLY) |
(a) As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector.
Click here
| NEXT | | END |
| 7. | REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY |
(a) Replace the throttle body with motor assembly.
Click here
HINT:
Perform "Inspection After Repair" after replacing the throttle body with motor assembly.
Click here
|
| 8. | CHECK WHETHER DTC OUTPUT RECURS (DTC P2119) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Click here
(e) Turn the power switch off and wait for at least 30 seconds.
(f) Turn the power switch on (IG).
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(j) Read the DTCs.
Powertrain > Engine and ECT > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P2119 is output | B |
| A | | END |
| B | | REPLACE ECM |
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