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.
2005 Suzuki Aerio L4-2.3LFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor: Adjustments
Adjustment
1. Warm up engine to normal operating temperature.
2. Check to make sure that fast idle cam and cam follower lever are not in contact with each other. If they are, check fast idle control system.
3. Loosen TP sensor screws.
4. When SUZUKI scan tool and cartridge are available, set them to DLC with ignition switch OFF. When they are not available, remove ECM and with couplers connected to ECM, connect digital type voltmeter as shown in figure.
5. Turn TP sensor (1) clockwise or counterclockwise and tighten TP sensor screw at a position where voltage as specified is obtained.
TP sensor voltage when throttle is fully close 0.50 ± 0.15V
Tightening torque
TP sensor screw (a): 2.5 Nm (0.25 kgf-m, 1.8 ft. lbs.)
6. Check to make sure that TP sensor voltage is specified value when throttle is fully open.
TP sensor voltage when throttle is fully open 4.0 ± 0.5V
7. Install ECM if removed.
8. With ignition switch OFF, disconnect battery negative cable from battery for 5 minutes or more.
9. Connect negative cable to battery.
1. Warm up engine to normal operating temperature.
2. Check to make sure that fast idle cam and cam follower lever are not in contact with each other. If they are, check fast idle control system.
3. Loosen TP sensor screws.
4. When SUZUKI scan tool and cartridge are available, set them to DLC with ignition switch OFF. When they are not available, remove ECM and with couplers connected to ECM, connect digital type voltmeter as shown in figure.
5. Turn TP sensor (1) clockwise or counterclockwise and tighten TP sensor screw at a position where voltage as specified is obtained.
TP sensor voltage when throttle is fully close 0.50 ± 0.15V
Tightening torque
TP sensor screw (a): 2.5 Nm (0.25 kgf-m, 1.8 ft. lbs.)
6. Check to make sure that TP sensor voltage is specified value when throttle is fully open.
TP sensor voltage when throttle is fully open 4.0 ± 0.5V
7. Install ECM if removed.
8. With ignition switch OFF, disconnect battery negative cable from battery for 5 minutes or more.
9. Connect negative cable to battery.
Factory Service Tools
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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.