Toyota RAV4 manuals

Toyota Sienna Service Manual: Throttle / Pedal Position Sensor/ Switch

DTC P2120 Throttle / Pedal Position Sensor / Switch "D" Circuit

DTC P2122 Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input

DTC P2123 Throttle / Pedal Position Sensor / Switch "D" Circuit High Input

DTC P2125 Throttle / Pedal Position Sensor / Switch "E" Circuit

DTC P2127 Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input

DTC P2128 Throttle / Pedal Position Sensor / Switch "E" Circuit High Input

DTC P2138 Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation

HINT: These DTCs relate to the Accelerator Pedal Position (APP) sensor.

DESCRIPTION

HINT: This ETCS (Electronic Throttle Control System) does not use a throttle cable.

The Accelerator Pedal Position (APP) sensor is integrated with the accelerator pedal bracket and has 2 sensor circuits: VPA (main) and VPA2 (sub). This sensor is a non-contact type, and uses Hall-effect elements, in order to yield accurate signals, even in extreme driving conditions, such as at high speeds as well as very low speeds. The voltage, which is applied to terminals VPA and VPA2 of the ECM, varies between 0 V and 5 V in proportion to the operating angle of the accelerator pedal (throttle valve). A signal from VPA indicates the actual accelerator pedal opening angle (throttle valve opening angle) and is used for engine control. A signal from VPA2 conveys the status of the VPA circuit and is used to check the APP sensor itself.

The ECM monitors the actual accelerator pedal opening angle (throttle valve opening angle) through the signals from VPA and VPA2, and controls the throttle actuator according to these signals.

DESCRIPTION

DESCRIPTION

HINT: When any of these DTCs are set, check the APP sensor voltage by selecting the following menu items on the intelligent tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ACCEL POS #1 and ACCEL POS #2.

DESCRIPTION

HINT:

MONITOR DESCRIPTION

When either of the voltage outputs of VPA or VPA2 deviates from the standard range, or the difference between the voltage outputs of the 2 sensor circuits is less than the threshold, the ECM determines that there is a malfunction in the APP sensor. The ECM then illuminates the MIL and sets a DTC.

Example: When the voltage output of VPA drops below 0.4 V for more than 0.5 seconds when the accelerator pedal is fully depressed, DTC P2122 is set.

If the malfunction is not repaired successfully, a DTC is set 2 seconds after the engine is next started.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

P2120:

TYPICAL MALFUNCTION THRESHOLDS

P2122:

TYPICAL MALFUNCTION THRESHOLDS

P2123:

TYPICAL MALFUNCTION THRESHOLDS

P2125:

TYPICAL MALFUNCTION THRESHOLDS

P2127:

TYPICAL MALFUNCTION THRESHOLDS

P2128:

TYPICAL MALFUNCTION THRESHOLDS

P2138:

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

FAIL-SAFE

When any of DTCs P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM uses the remaining circuit to calculate the accelerator pedal position to allow the vehicle to continue driving. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned off.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT: Read freeze frame data using the 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

1 READ VALUE OF INTELLIGENT TESTER (ACCEL POS #1 AND ACCEL POS #2)

READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.
  2.  Turn the ignition switch to the ON position and turn the tester on.
  3.  Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ACCEL POS #1 and ACCEL POS #2.
  4.  Read the values displayed on the tester.

Standard voltage

Standard voltage

2 CHECK HARNESS AND CONNECTOR (ACCELERATOR PEDAL POSITION SENSOR - ECM)

CHECK HARNESS AND CONNECTOR

  1. Disconnect the A15 Accelerator Pedal Position (APP) sensor connector.
  2.  Disconnect the E4 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 APP sensor connector.
  2. Reconnect the ECM connector.

3 INSPECT ECM (VCPA AND VCP2 VOLTAGE)

INSPECT ECM

  1. Disconnect the A15 APP sensor connector.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

  1. Reconnect the APP sensor connector.

4 REPLACE ACCELERATOR PEDAL ROD

  1. Replace the accelerator pedal rod assembly

5 CHECK WHETHER DTC OUTPUT RECURS (ACCELERATOR PEDAL POSITION SENSOR DTCS)

  1. Connect the intelligent tester to the DLC3.
  2.  Turn the ignition switch to the ON position and turn the tester on.
  3.  Clear the DTCs.
  4.  Start the engine.
  5.  Allow the engine to idle for 15 seconds.
  6.  Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
  7.  Read the DTCs.

Result

Result

REPLACE ECM

Throttle Actuator Control Throttle Body Range / Performance
DTC P2119 Throttle Actuator Control Throttle Body Range / Performance DESCRIPTION The Electronic Throttle Control System (ETCS) is composed of the throttle actuator, Throttle Position (TP) senso ...

Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance
DTC P2121 Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance HINT: This DTC relates to the Accelerator Pedal Position (APP) sensor. DESCRIPTION Refer to DTC P2120 ...

Other materials:

Disassembly
1. REMOVE OIL PUMP RELIEF VALVE (A) using a 27 mm socket wrench, remove the relief valve plug. (B) remove the valve spring and oil pump relief valve. 2. REMOVE OIL PUMP COVER (a) Remove the 8 bolts, oil pump cover and oil pump rotor set. ...

Installation
1. Install transmission valve body assembly (a) Install the shift solenoid valve SL1 to the valve body assembly with the bolt. Torque: 6.6 N*m (67 kgf*cm, 58 in.*lbf) (b) Install the shift solenoid valve SL2 to the valve body assembly with the bolt. Torque: 11 N*m (110 kgf*cm, 8 ft ...

Inspection
1. INSPECT MASS AIR FLOW METER  Visually check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter. OK: There is no foreign matter. If the result is not as specified, replace the mass air flow meter. Measure the resistance according to the ...

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