Dtc P2102 Throttle Actuator Control Motor Circuit Low

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

CHECK HARNESS AND CONNECTOR (THROTTLE WITH MOTOR BODY ASSEMBLY - ECM)

INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (VISUALLY CHECK THROTTLE VALVE)

INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE VALVE)

DTC P2102 Throttle Actuator Control Motor Circuit Low

DTC 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 with motor 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.
DTC Detection Condition
Trouble Area
P2102
Both of the following conditions continue for 2.0 seconds (1 trip detection logic):
(a) The throttle actuator duty ratio is 80% or more.
(b) The throttle actuator current is below 0.5 A.
  1. Open in throttle actuator circuit
  2. Throttle actuator
  3. ECM
P2103
Either of the following conditions is met (1 trip detection logic):
  1. A hybrid IC diagnosis signal failure.
  2. A hybrid IC current limiter port failure.
  1. Short in throttle actuator circuit
  2. Throttle actuator
  3. Throttle valve
  4. Throttle with motor body assembly
  5. ECM

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.
  1. Example:
    1. When the electrical current is below 0.5 A and the throttle actuator duty ratio exceeds 80%, the ECM interprets this as the current being outside the standard range, illuminates the MIL and stores a DTC.
    2. If the malfunction is not repaired successfully, a DTC is stored when the engine is quickly revved to a high rpm several times after the engine has idled for 5 seconds after engine start.

MONITOR STRATEGY


Related DTCs
P2102: Throttle Actuator Current (Low Current)
P2103: Throttle Actuator Current (High Current)
Required Sensors/Components (Main)
Throttle actuator (throttle with motor body assembly)
Required Sensors/Components (Related)
None
Frequency of Operation
Continuous
Duration
P2102: 2 seconds
P2103: Within 1 second
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


Monitor runs whenever following DTCs not present
None

P2102:
Throttle actuator
ON
Duty-cycle ratio to open throttle actuator
80% or more
Throttle actuator power supply
8 V or higher
Motor current change during last 0.016 seconds
Below 0.2 A

P2103:
Throttle actuator
ON
Either of the following conditions 1 or 2 is met:
-
1. Throttle actuator power supply
8 V or higher
2. Throttle actuator power
ON

TYPICAL MALFUNCTION THRESHOLDS


P2102:
Throttle actuator current
Below 0.5 A

P2103:
Either of following conditions is met:
A or B
A. Hybrid IC diagnosis signal
Fails 25 times
B. Hybrid IC current limiter port
Fails for 0.6 seconds

CONFIRMATION DRIVING PATTERN


Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P2102 Throttle Actuator Control Motor Circuit Low

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear 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 Techstream 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 pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. 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.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again.
  14. If no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0T5X.html).
    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

FAIL-SAFE

When either of these DTCs or other DTCs relating to ETCS (Electronic Throttle Control System) 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 6.0° 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 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


Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P2102 Throttle Actuator Control Motor Circuit Low


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. 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.
  2. 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 Techstream. However, the ECM shuts off the throttle actuator current when the electronic throttle control system malfunctions.
1.INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

  1. Inspect the throttle with motor body assembly (YARIS_NCP93 RM000003VHP00GX.html).

    HINT:
    Perform "Inspection After Repair" after replacing the throttle with motor body assembly (YARIS_NCP93 RM000004NJD006X.html).


NG
REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY (YARIS_NCP93 RM000003VHR00IX.html)
OK


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

  1. Disconnect the throttle with motor body assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C53-2 (M+) - C51-60 (M+)
    		Always
    		Below 1 Ω
    C53-1 (M-) - C51-30 (M-)
    		Always
    		Below 1 Ω
    C53-2 (M+) or C51-60 (M+) - Body ground
    		Always
    		10 kΩ or higher
    C53-1 (M-) or C51-30 (M-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Check for foreign objects between the throttle valve and the housing.

    OK:
    No foreign objects between the throttle valve and housing.
    HINT:
    Perform "Inspection After Repair" after cleaning the throttle with motor body assembly (YARIS_NCP93 RM000004NJD006X.html).


NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY
OK


4.INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY (THROTTLE VALVE)

  1. 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 with motor body assembly (YARIS_NCP93 RM000004NJD006X.html).


NG
REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY (YARIS_NCP93 RM000003VHR00IX.html)
OK

REPLACE ECM (YARIS_NCP93 RM000001CN002IX.html)