P0222
1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction
DTC P0120 - Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction
DTC 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
DESCRIPTION
HINT:
- This electrical throttle system does not use a throttle cable.
- This is the troubleshooting procedure of the throttle position sensor.
HINT: The throttle position sensor is mounted on the throttle body and it has 2 sensor terminals to detect the throttle opening angle and malfunctions of the throttle position sensor itself.
The voltage applied to terminals VTA and VTA2 of the ECM changes between 0 V and 5 V in proportion to the opening angle of the throttle valve. The VTA is a signal to indicate the actual throttle valve opening angle which is used for the engine control, and the VTA2 is a signal to indicate the information about the opening angle which is used for detecting malfunctions of the sensor.
The ECM judges the current opening angle of the throttle valve from these signals input from terminals VTA and VTA2, and the ECM controls the throttle motor to make the throttle valve angle properly in response to the driving condition.
When a malfunction is detected, the throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is canceled until the system returns to normal and the power switch is turned OFF.
NOTE: When a malfunction is detected, the throttle valve is locked at a certain opening angle. Also, the whole electronically controlled throttle operation is canceled until the system returns to normal and the power switch is turned OFF.
HINT:
- After confirming DTCs, confirm condition of the throttle valve opening angle (THROTTLE POS) and the closed throttle position switch (THROTTLE POS #2) using Techstream.
- THROTTLE POS means the VTA1 signal (expressed as percentage), and THROTTLE POS#2 means the VTA2 signal (expressed as volts).
MONITOR DESCRIPTION
The ECM uses the throttle position sensor to monitor the throttle valve opening angle.
(a) There is a specific voltage difference between VTA1 and VTA2 for each throttle opening angle.
(b) VTA1 and VTA2 each has a specific voltage operating range.
(c) VTA1 and VTA2 should never be close to the same voltage level.
If the difference between VTA1 and VTA2 is incorrect (a), the ECM interprets this as a fault and will set a DTC.
If VTA1 or VTA2 is out of the normal operating range (b), the ECM interprets this as a fault and will set a DTC.
If VTA1 is within 0.02 V of VTA2 (c), the ECM interprets this as a short circuit in the throttle position sensor system and will set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
P0120:
P0122:
P0123:
P0220:
P0222:
P0223:
P2135 Case 1:
P2135 Case 2:
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
- If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
- Read freeze frame data using Techstream. 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 Freeze Frame Data.
PROCEDURE
1. INSPECT THROTTLE POSITION SENSOR (RESISTANCE)
(a) Disconnect the T3 throttle position sensor connector.
(b) Measure the resistance between the terminals of the throttle position sensor.
Standard resistance:
(c) Reconnect the throttle position sensor connector.
NG -- REPLACE THROTTLE W/MOTOR BODY ASSEMBLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ECM - THROTTLE POSITION SENSOR)
(a) Disconnect the T3 throttle position sensor connector.
(b) Disconnect the ECM E4 connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(d) Reconnect the ECM connector.
(e) Reconnect the throttle position sensor connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK ECM (VC - E2)
(a) Turn the power switch ON (IG).
(b) Measure the voltage between terminals VC and E2 of the ECM connector.
Standard voltage:
NG -- REPLACE ECM
OK -- REPLACE THROTTLE W/MOTOR BODY ASSEMBLY