P0122

DTC P0122, P0123 TP SENSOR





Component Description





Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are a kind of potentiometer which transform the throttle valve position into output voltage, and emit the voltage signals to the ECM. The
ECM judges the current opening angle of the throttle valve from these signals and controls the throttle valve opening angle in response to driving condition via the throttle control motor.




CONSULT-III Reference Value in Data Monitor Mode
Specification data are reference values.









On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.

On Board Diagnosis Logic:

FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates.

FAIL-SAFE MODE:

DTC Confirmation Procedure

NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to P0122.




Wiring Diagram
Specification data are reference values and are measured between each terminal and ground.

CAUTION:
Never use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.









Diagnosis Procedure
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to Power Supply and Ground Circuit.





OK or NG
OK - GO TO 2.
NG - Repair or replace ground connections.
2.CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I





1. Disconnect electric throttle control actuator (1) harness connector.
- Illustration shows the view with intake air duct removed.
2. Turn ignition switch ON.





3. Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-III or tester.

Voltage: Approximately 5 V

OK or NG
OK - GO TO 7.
NG - GO TO 3.
3.CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47. Refer to Wiring Diagram.

Continuity should exist.

OK or NG
OK - GO TO 4.
NG - Repair open circuit.
4.CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.





OK or NG
OK - GO TO 5.
NG - Repair short to ground or short to power in harness or connectors.
5.CHECK APP SENSOR
Refer to P2127.
OK or NG
OK - GO TO 11.
NG - GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform Testing and Inspection.
3. Perform Throttle Valve Closed Position Learning.
4. Perform Testing and Inspection.
4. Perform Testing and Inspection.
INSPECTION END
7.CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between electric throttle control actuator terminal 4 and ECM terminal 66. Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 8.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
8.CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 69 and electric throttle control actuator terminal 3. Refer to Wiring Diagram.

Continuity should exist.

2. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 9.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK THROTTLE POSITION SENSOR
Refer to P0122.
OK or NG
OK - GO TO 11.
NG - GO TO 10.
10.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform Throttle Valve Closed Position Learning.
3. Perform Testing and Inspection.
INSPECTION END
11.CHECK INTERMITTENT INCIDENT
Refer to Diagnosis Procedure.
INSPECTION END




Component Inspection

THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform Throttle Valve Closed Position Learning.
3. Turn ignition switch ON.
4. Set selector lever to the D position.





5. Check voltage between ECM terminal 50 (TP sensor 1 signal) and ground, ECM terminal 69 (TP sensor 2 signal) and ground under the following conditions.





6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform Throttle Valve Closed Position Learning.
8. Perform Testing and Inspection.




Removal and Installation

ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to Component.