Dtc P2102 Throttle Actuator Control Motor Circuit Low

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Az-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

FAIL-SAFE

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)

CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)

INSPECT THROTTLE BODY ASSEMBLY

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 (TP) sensor, which is mounted on the throttle body assembly. 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 0.2 A or less
  1. Open in throttle actuator circuit
  1. Throttle actuator
  1. ECM
P2103
Either of following conditions met (1 trip detection logic):
  1. Throttle actuator current 10 A or more for 0.1 seconds
  2. Throttle actuator current 7 A or more for 0.6 seconds
  1. Short in throttle actuator circuit
  1. Throttle actuator
  1. Throttle valve
  1. Throttle body assembly
  1. ECM

FAIL-SAFE

When either of these DTCs, or other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM 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 ignition switch is then turned off.

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Engine Control System.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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.
  1. 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 intelligent tester. However, the ECM shuts off the throttle actuator current when the ETCS malfunctions.
1.INSPECT THROTTLE BODY ASSEMBLY (RESISTANCE OF THROTTLE ACTUATOR)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Engine Control System.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low

  1. Disconnect the B3 throttle body connector.

  1. Measure the resistance between the terminals of the throttle actuator.

    Standard resistance:
    Tester Connection
    		Specified Condition
    M+ (2) - M- (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 ACTUATOR - ECM)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Engine Control System.Sfi System. Dtc P2102 Throttle Actuator Control Motor Circuit Low

  1. Disconnect the B3 throttle body connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    M+ (B32-42) - M+ (B3-2)
    		Below 1 Ω
    M- (B32-41) - M- (B3-1)
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    M+ (B32-42) or M+ (B3-2) - Body ground
    		10 kΩ or higher
    M- (B32-41) or M- (B3-1) - Body ground

  1. Reconnect the throttle body connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT THROTTLE BODY ASSEMBLY

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

    OK:
    No foreign object between throttle valve and housing.


NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY ASSEMBLY
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 ECM