Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P2133 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.
Is DTC P0643 detected?
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Perform diagnosis of applicable. Refer to DTC Description .
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GO TO 2.
- CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY
- Disconnect electric throttle control actuator harness connector.
- Turn ignition switch ON.
- Check the voltage between electric throttle control actuator harness connector and ground.
+ - Voltage (Approx.) Electric throttle control actuator Connector Terminal F50 3 Ground 5 V
Is the inspection result normal?
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GO TO 5.
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GO TO 3.
- CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 3 F79 129 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
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GO TO 4.
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Repair or replace error-detected parts.
- CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Refer to Diagnosis Procedure .
Is the inspection result normal?
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Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .
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Repair or replace error-detected parts.
- CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 2 F79 100 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
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GO TO 6.
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Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT
- Check the continuity between ECM harness connector and ground.
ECM - Continuity Connector Terminal F78 3 Ground Existed F79 87 E16 199 201 204 - Also check harness for short to power.
Is the inspection result normal?
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GO TO 7.
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Repair or replace error-detected parts.
- Check the continuity between ECM harness connector and ground.
- CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
Electric throttle control actuator ECM Continuity Connector Terminal Connector Terminal F50 1 F79 103 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
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GO TO 8.
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Repair or replace error-detected parts.
- Check the continuity between electric throttle control actuator harness connector and ECM harness connector.
- CHECK THROTTLE POSITION SENSOR
Refer to Component Inspection (Throttle Position Sensor) .
Is the inspection result normal?
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INSPECTION END
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Replace malfunctioning electric throttle control actuator. Refer to Exploded View .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.