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.
Throttle Body (SMT): Inspection
- INSPECT THROTTLE CONTROL MOTOR
- Using an ohmmeter, measure the motor resistance between terminal 1 (M+) and 2 (M-).
Motor resistance: 0.3 - 100 Ω at 20°C (68°F)
If the resistance is not as specified, replace the throttle body assembly.
- Using an ohmmeter, measure the clutch resistance between terminal 3 (CL-) and 4 (CL+).
Clutch resistance: 4.2 - 5.2 Ω at 20°C (68°F)
If the resistance is not as specified, replace the throttle body assembly.
- Using an ohmmeter, measure the motor resistance between terminal 1 (M+) and 2 (M-).
- INSPECT THROTTLE POSITION SENSOR
Using an ohmmeter, measure the resistance between terminals VC and E2.
Resistance: 1.2 - 3.2 kΩ at 20°C (68°F)
If the resistance is not as specified, replace the sensor (See REPLACEMENT ).
- INSPECT ACCELERATOR POSITION SENSOR
Using an ohmmeter, measure the resistance between terminals VC and E2.
Resistance: 1.2 - 3.2 kΩ at 20°C (68°F)
If the resistance is not as specified, replace the sensor (See REPLACEMENT ).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.