DTC    P2102    Throttle Actuator Control Motor Circuit Low

DTC    P2103    Throttle Actuator Control Motor Circuit High

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SYSTEM DESCRIPTION

The throttle actuator is operated by the ECM (Included in HV Control ECU) and opens and closes the throttle valve using gears.
The opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted on the throttle body. The TP 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) continue for 2.0 seconds (1 trip detection logic):
(a) Throttle actuator duty ratio 80 % or more
(b) Throttle actuator current 0.5 A or less
  1. Open in throttle actuator circuit
  2. Throttle actuator
  3. HV Control ECU
P2103
Throttle control motor current 7A
or more (0.6 seconds)
(1 trip detection logic)
  1. Short in throttle actuator circuit
  2. Throttle actuator
  3. Throttle valve
  4. Throttle body assembly
  5. HV Control ECU

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, is set, the ECM (Included in HV Control ECU) 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 6° 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 engine switch is then turned off.

WIRING DIAGRAM


A106050E05


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using an intelligent tester. 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 intelligent tester. However the ECM shuts off the throttle actuator current when the ETCS malfunctions.

1.INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE CONTROL MOTOR)


    A059778E08

  1. Disconnect the T2 throttle body connector.

  1. Measure the resistance between the terminals of the throttle control motor.

    Standard resistance:
    Tester Connection
    		Specified Condition
    M+ (T2-2) - M- (T2-1)
    		0.3 to 100 Ω at 20°C (68°F)

  1. Reconnect the throttle body connector.



NG
REPLACE THROTTLE BODY ASSEMBLY
OK


2.CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - HV CONTROL ECU)


    A110911E03

  1. Disconnect the T2 throttle body connector.

  1. Disconnect the H32 HV Control ECU connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    M+ (T2-2) - M+ (H32-3)
    		Below 1 Ω
    M- (T2-1) - M- (H32-2)
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    M+ (T2-2) or M+ (H32-3) - Body ground
    		10 kΩ or higher
    M- (T2-1) or M- (H32-2) - Body ground
    		10 kΩ or higher

  1. Reconnect the throttle body connector.

  1. Reconnect the HV Control ECU connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.INSPECT THROTTLE BODY ASSEMBLY

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

    OK:
    No foreign objects.



NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY
OK


4.INSPECT THROTTLE VALVE

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

    OK:
    Throttle valve opens and closes smoothly.



NG
REPLACE THROTTLE BODY ASSEMBLY
OK

REPLACE HV CONTROL ECU