2ZR-FE ENGINE CONTROL  SFI SYSTEM  P2102  Throttle Actuator Control Motor Circuit Low  P2103  Throttle Actuator Control Motor Circuit High  


DESCRIPTION

The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.

The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.

HINT:

This Electronic Throttle Control System (ETCS) does not use a throttle cable.


DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2102 Throttle Actuator Control Motor Circuit Low Both of the following conditions are met for 2.0 seconds (1 trip detection logic):
·

The throttle actuator drive duty cycle is 80% or higher.

·

The throttle actuator current is less than 0.5 A.


·

Open in throttle actuator circuit

·

Throttle actuator

·

ECM


Comes on DTC stored
P2103 Throttle Actuator Control Motor Circuit High Either of the following conditions is met (1 trip detection logic):
·

A motor driver IC diagnosis signal failure.

·

A motor driver IC high current limiter monitor input failure.


·

Short in throttle actuator circuit

·

Throttle actuator

·

Throttle valve

·

Throttle body assembly

·

ECM


Comes on DTC stored

MONITOR DESCRIPTION

The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components Throttle actuator (throttle body assembly)
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN

A220567E32
3.656,1.448 3.229,0.396 3.229,0.396 3.51,0.396 false 4.802,1.979 5.24,1.083 5.24,1.083 5.396,1.083 false 2.667,1.99 2.438,1.156 2.438,1.156 2.604,1.156 false 1.24,1.865 1.635,2.083 0.396,0.219 10 false Idling 0.458,2.167 1.667,2.531 1.208,0.365 10 false Ignition Switch ON 2.115,2.031 2.406,2.24 0.292,0.208 10 false [A] 3.844,1.75 4.083,1.938 0.24,0.188 10 false [B] 5.479,0.99 6.146,1.156 0.667,0.167 10 false Released 3.583,0.302 4.385,0.469 0.802,0.167 10 false Depressed 3.521,2.729 4.719,2.917 1.198,0.188 10 false 2 seconds or more 5.271,3.521 5.531,3.729 0.26,0.208 10 false [C] 3.802,3.167 5.417,3.354 1.615,0.188 10 false 16 seconds or more 2.656,1.073 3.333,1.25 0.677,0.177 10 false Released

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for at least 30 seconds.

5.

Turn the ignition switch to ON and turn the GTS on [A].

6.

Start the engine.

7.

With the vehicle stationary, fully depress the accelerator pedal and quickly release it [B].

8.

Check that 16 seconds or more have elapsed from the instant when the accelerator pedal is first depressed.

9.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].

10.

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.



11.

Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

12.

Input the DTC: P2102 or P2103.

13.

Check the DTC judgment result.

GTS 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


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, perform steps [B] and [C] again.




FAIL-SAFE

When any of these DTCs 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 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 running 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

A296671E86
0.813,2.698 1.885,2.896 1.073,0.198 10 false FL MAIN 1,4.24 2.073,4.438 1.073,0.198 10 false Battery 1.49,1.26 2.563,1.458 1.073,0.198 10 false ETCS 1.688,2.958 2.76,3.156 1.073,0.198 10 false B24 1.677,3.146 3.281,3.823 1.604,0.677 10 false Throttle Actuator (Throttle Body Assembly) 2.594,1.667 2.948,1.844 0.354,0.177 10 false M+ 2.625,2.51 2.979,2.688 0.354,0.177 10 false M- 2.906,1.667 3.26,1.844 0.354,0.177 10 false 2 2.917,2.51 3.271,2.688 0.354,0.177 10 false 1 3.281,2.979 4.354,3.177 1.073,0.198 10 false Shielded 4.5,1.01 4.854,1.188 0.354,0.177 10 false 29 4.521,1.667 4.875,1.844 0.354,0.177 10 false 60 4.51,2.5 4.865,2.677 0.354,0.177 10 false 30 4.406,3.156 4.76,3.333 0.354,0.177 10 false 108 4.521,3.698 4.875,3.875 0.354,0.177 10 false 28 4.521,4.208 4.875,4.385 0.354,0.177 10 false 59 4.771,4.323 5.125,4.5 0.354,0.177 10 false E1 4.76,3.688 5.24,3.875 0.479,0.188 10 false ME01 4.75,3.229 5.229,3.417 0.479,0.188 10 false GE01 4.75,2.5 5.104,2.677 0.354,0.177 10 false M- 4.75,1.667 5.104,1.844 0.354,0.177 10 false M+ 4.76,1 5.833,1.198 1.073,0.198 10 false +BM 5.385,5 5.74,5.177 0.354,0.177 10 false B64 5.719,4.99 6.073,5.167 0.354,0.177 10 false ECM 5.25,1.813 6.292,2.719 1.042,0.906 10 false Throttle Actuator Control Circuit

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.


HINT:
·

Read freeze frame data using the GTS. 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.

·

The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle Motor Duty (Open) / Throttle Motor Duty (Close)) can be read using the GTS. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.



PROCEDURE

1.INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
a.

Inspect the throttle body assembly.

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>THROTTLE BODY>INSPECTION

HINT:

Perform "Inspection After Repair" after replacing the throttle body assembly.

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>INITIALIZATION



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (THROTTLE BODY ASSEMBLY - ECM)

NG

REPLACE THROTTLE BODY ASSEMBLY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>THROTTLE BODY>REMOVAL


2.CHECK HARNESS AND CONNECTOR (THROTTLE BODY ASSEMBLY - ECM)
a.

Disconnect the throttle body assembly connector.


b.

Disconnect the ECM connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
B24-2 (M+) - B64-60 (M+) Always Below 1 Ω
B24-1 (M-) - B64-30 (M-) Always Below 1 Ω
B24-2 (M+) or B64-60 (M+) - Body ground and other terminals Always 10 kΩ or higher
B24-1 (M-) or B64-30 (M-) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.INSPECT THROTTLE BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)
a.

Check for foreign matter between the throttle valve and the housing.

OK:

No foreign matter between the throttle valve and housing.


HINT:

Perform "Inspection After Repair" after cleaning the throttle body assembly.

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>INITIALIZATION



Result:
Proceed to
OK
NG



OK

4.INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)

NG

REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY ASSEMBLY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>P2109


4.INSPECT THROTTLE BODY ASSEMBLY (THROTTLE VALVE)
a.

Check if the throttle valve opens and closes smoothly.

OK:

Throttle valve opens and closes smoothly.


HINT:

Perform "Inspection After Repair" after replacing the throttle body assembly.

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>INITIALIZATION



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL


NG

REPLACE THROTTLE BODY ASSEMBLY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>THROTTLE BODY>REMOVAL