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.
Test Description
2004 Oldsmobile Bravada RWDSECTION Test Description
WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic procedures.
- 3
The TP sensor may be able to auto zero after several engine starts if the sensor is stuck, but may not be able to reach the sensors range near 100 percent. The TP angle should increase steadily. If the voltage value spikes high or low, consider the test failed. - 4
The TP sensor has an auto zeroing feature. If voltage reading is 0.2-0.9 volt, PCM will assume that TP sensor is at a closed throttle position of 0 percent. If reading is out of the auto zeroing range at closed throttle, look for a binding or damaged linkage. - 6
While starting the engine, the MAP sensor should detect any changes in manifold pressure. This test is to determine if the sensor is stuck at a value. - 7
A normal MAP sensor will react as quickly to the throttle changes as they can be made. A MAP sensor should not appear to be lazy or catch up with the throttle movements. - 28
Spread terminals or faulty electrical connections can produce normal results when the circuits are probed but cause incorrect readings when the circuits are connected. Be sure to check all terminals for this condition.
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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.