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Home >> Suzuki >> 1996 >> Sidekick JS, 2D Utility, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 1.8L >> Circuit Tests >> DTC P0121 - Throttle Position (TP) Sensor System Performance
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DTC P0121 - Throttle Position (TP) Sensor System Performance

NOTE: If DTCs P0121, P0122 and P0123 are set together, diagnose P0122 and P0123 first.

Start engine and allow to reach normal operating temperature. Turn engine off, leaving ignition on. Using a voltmeter, measure voltage between ground and PCM harness connector "B", terminal No. 17. With throttle fully closed, reading should be .35-.65 volt. With throttle fully open, reading should be 3.5-4.5 volts. Ensure voltage varies with throttle position. If reading is not as specified, adjust TP sensor. See ADJUSTMENTS - 1.8L article. If adjustment cannot be obtained, replace TP sensor. Retest system.

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