P0220
DTC P0120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A"CIRCUITDTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A"CIRCUIT LOW INPUT
DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A"CIRCUIT HIGH INPUT
DTC P0220 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B"CIRCUIT
DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B"CIRCUIT LOW INPUT
DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B"CIRCUIT HIGH INPUT
DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" / "B" VOLTAGE CORRELATION
HINT: This is the purpose of troubleshooting on the throttle position sensor.
CIRCUIT DESCRIPTION
HINT:
- This Electrical Throttle Control System (ECTS) does not use a throttle cable.
- This throttle position sensor is a non-contact type.
DTC Detection Condition:
The throttle position sensor is mounted on the throttle body and it detects the opening angle of the throttle valve. This sensor is electronically controlled and uses Hall-effect elements, so that accurate control and reliability can be obtained. The throttle position sensor has 2 sensor elements / signal output: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and VTA2 is used to detect malfunction in VTA1. Voltage applied to VTA1 and VTA2 changes between 0V and 5V in proportion to the opening angle of the throttle valve. There are several checks that the ECM performs to confirm proper operation of the throttle position sensor and VTA1.
The ECM judges the current opening angle of the throttle valve from these signals input from terminals VTA1 and VTA2, and the ECM controls the throttle motor to make the throttle valve angle properly in response to driver inputs.
NOTE: When a malfunction is detected, the throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is cancelled until the system returns to normal and the ignition switch is turned to OFF.
HINT:
- After confirming DTCs, use the hand-held tester or the OBD II scan tool to confirm the throttle valve opening percentage and closed throttle position switch condition.
- The THROTTLE POS means the VTA1 signal, and the THROTTLE POS #2 stands for the VTA2 signal.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
Component Operating Range:
The ECM uses the throttle position sensor to monitor the throttle valve opening angle.
- If the difference between VTA1 and VTA2 is incorrect, the ECM interprets this as a default and will set a DTC.
a. VTA1 and VTA2 have their own specific voltage operating range.
- If VTA1 or VTA2 is out of the normal operating range, the ECM interprets this as a fault and will set a DTC.
b. VTA1 and VTA2 each have a specific voltage operating range.
- If VTA1 or VTA2 is out of the normal operating range, the ECM interprets this as a fault and will set a DTC.
c. VTA1 and VTA2 should never be close to the same voltage levels.
- If VTA1 is within 0.02V of VTA2, the ECM interprets this as a short circuit in the throttle position sensor system and will set a DTC.
FAIL SAFE
If the Electronic Throttle Control System (ETCS) has a malfunction, the ECM cuts off current to the throttle control motor. The throttle control valve returns to a predetermined opening angle (approximately 16 degrees) by the force of 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 enable the vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" condition is detected and then the ignition switch is turned to OFF, the fail-safe operation will stop and the system will return to normal condition.
Wiring Diagram:
INSPECTION PROCEDURE
HINT:
- If DTCs related to different system that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
- Read freeze frame data using the hand-held tester or the OBD II scan tool. 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 running or stopped, 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.
Step 1:
Step 2-3:
Step 4-5:
Hand-held tester:
Step 1-2:
Step 3-4:
OBD II scan tool (excluding hand-held tester):