Dtc P2102 Throttle Actuator Control Motor Circuit Low


DESCRIPTION

MONITOR DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)

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

INSPECT 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 body with motor 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 ETCS (Electronic Throttle Control System) does not use a throttle cable.

DTC No.
DTC Detection Condition
Trouble Area
P2102
Conditions (a) and (b) are met for 2.0 seconds (1 trip detection logic):
(a) The throttle actuator duty ratio is 80% or more.
(b) The throttle actuator current is 0.5 A or less.
  1. Open in throttle actuator circuit
  2. Throttle actuator
  3. ECM
P2103
Either condition 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 body with motor 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, it becomes 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 0.5 A or less and the throttle actuator duty ratio is 80% or more, 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.

FAIL-SAFE

When either of these DTCs as well as 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 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 running at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly.
The ECM continues operating in fail-safe mode until a pass condition is detected, and the engine switch is then turned off.

WIRING DIAGRAM

  1. for Automatic Transmission

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low

  1. for Manual Transmission

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. 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 Open Duty / Throttle Motor Close Duty) can be read using the GTS. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.
1.INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

  1. Inspect the throttle body with motor assembly (LandCruiser RM000000Q0N046X_01_0001.html).

    HINT:
    for Automatic Transmission
    Perform "Inspection After Repair" after replacing the throttle body with motor assembly (LandCruiser RM000004NJC03SX.html).


NG
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (LandCruiser RM000000Q0P050X.html)
OK


2.CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)

  1. Disconnect the throttle body with motor assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    for Automatic Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C13-2 (M+) - C37-19 (M+)
    		Always
    		Below 1 Ω
    C13-1 (M-) - C37-20 (M-)
    		Always
    		Below 1 Ω
    for Manual Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C13-2 (M+) - C37-20 (M+)
    		Always
    		Below 1 Ω
    C13-1 (M-) - C36-29 (M-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    for Automatic Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C13-2 (M+) or C37-19 (M+) - Body ground
    		Always
    		10 kΩ or higher
    C13-1 (M-) or C37-20 (M-) - Body ground
    		Always
    		10 kΩ or higher
    for Manual Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C13-2 (M+) or C37-20 (M+) - Body ground
    		Always
    		10 kΩ or higher
    C13-1 (M-) or C36-29 (M-) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the throttle body with motor assembly connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

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

    OK:
    No foreign objects between the throttle valve and housing.
    HINT:
    for Automatic Transmission
    Perform "Inspection After Repair" after replacing the throttle body with motor assembly (LandCruiser RM000004NJC03SX.html).


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


4.INSPECT THROTTLE VALVE

  1. Check if the throttle valve opens and closes smoothly.

    OK:
    Throttle valve opens and closes smoothly.
    HINT:
    for Automatic Transmission
    Perform "Inspection After Repair" after replacing the throttle body with motor assembly (LandCruiser RM000004NJC03SX.html).


NG
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (LandCruiser RM000000Q0P050X.html)
OK

REPLACE ECM (LandCruiser RM00000329203TX.html)