Toyota RAV4 manuals

Toyota Sienna Service Manual: Throttle Actuator Control Motor Circuit

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. 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.

DESCRIPTION

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 sets a DTC.

Example: When the electrical current is more than 10 A, or less than 0.5 A and the throttle actuator duty ratio exceeds 80%, the ECM interprets this as the current being outside the standard range, and illuminates the MIL and sets a DTC.

If the malfunction is not repaired successfully, a DTC is set when the engine is quickly revved up to a high rpm several times after the engine has idled for 5 seconds after engine start.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All:

TYPICAL ENABLING CONDITIONS

P2102:

P2103:

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

P2102:

TYPICAL MALFUNCTION THRESHOLDS

P2103:

TYPICAL MALFUNCTION THRESHOLDS

FAIL-SAFE

When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, is 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 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

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1 INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE CONTROL MOTOR)

 INSPECT THROTTLE BODY

  1. Disconnect the T2 throttle body connector.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

  1. Reconnect the throttle body connector

2 CHECK HARNESS AND CONNECTOR (THROTTLE CONTROL MOTOR - ECM)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the T2 throttle body connector.
  2.  Disconnect the E9 ECM connector.
  3. Measure the resistance according to the value(s) in the table below.

Standard resistance : Check for open

Standard resistance

Check for short

Standard resistance

  1. Reconnect the throttle body connector.
  2. Reconnect the ECM connector.

3 INSPECT THROTTLE BODY

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

OK: Normal

4 INSPECT THROTTLE VALVE

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

OK: The throttle valve opens and closes smoothly.

REPLACE ECM

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Throttle Actuator Control System
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Other materials:

Inspection
1. INSPECT TIRES (a) Check the tires for wear and proper inflation pressure. Cold tire inflation pressure (b) Using a dial indicator, check the runout of the tires. Tire runout: 1.4 mm (0.055 in.) or less 2. ROTATE TIRES HINT: Rotate the tires as shown in the illustration. 3. INSP ...

Removal
HINT: Remove the RH side by the same procedure as the LH side. 1. REMOVE REAR WHEEL 2. REMOVE QUARTER TRIM PANEL ASSEMBLY FRONT LH HINT: Remove the LH side by the same procedure as the RH side (See page IR-9). 3. REMOVE REAR SPEED SENSOR (a) Disconnect the speed sensor connector, and pu ...

Installation
1. INSTALL REAR DIFFERENTIAL SIDE GEAR SHAFT BOLT (a) Install the bolt tightening the nut through the plate washer. 2. INSTALL REAR DRIVE SHAFT ASSEMBLY LH HINT: (See page DS-26) 3. INSTALL REAR AXLE SHAFT NUT LH HINT: (See page DS-26) 4. INSTALL REAR SPEED SENSOR LH HINT: (See page D ...

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