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.
1996 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Engine Control System - Tests W/Codes - 3.1L: Specifications
MAP SENSOR VOLTAGE (1)
| Altitude | Voltage Range | ||
|---|---|---|---|
| Less Than 1000 | 3.8-5.5 | ||
| 1000-2000 | 3.6-5.3 | ||
| 2000-3000 | 3.5-5.1 | ||
| 3000-4000 | 3.3-5.0 | ||
| 4000-5000 | 3.2-4.8 | ||
| 5000-6000 | 3.0-4.6 | ||
| 6000-7000 | 2.9-4.5 | ||
| 7000-8000 | 2.8-4.3 | ||
| 8000-9000 | 2.6-4.2 | ||
| 9000-10,000 | 2.5-4.0 | ||
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IAT TEMPERATURE-TO-RESISTANCE VALUES (SATURN)
| Temperature °F (°C) | Ohms |
|---|---|
| 284 (140) | 63-68 |
| 248 (120) | 104-113 |
| 220 (105) | 159-172 |
| 200 (94) | 215-235 |
| 180 (83) | 302-334 |
| 160 (72) | 430-480 |
| 140 (60) | 650-730 |
| 120 (49) | 980-1100 |
| 100 (38) | 1500-1700 |
| 80 (27) | 2400-2700 |
| 60 (16) | 3900-4500 |
| 40 (4) | 6600-8400 |
| 20 (-7) | 11,000-15,000 |
| 0 (-18) | 21,000-27,000 |
| -20 (-29) | 39,000-53,000 |
| -40 (-40) | 77,000-109,000 |
IAT TEMPERATURE-TO-RESISTANCE VALUES (EXCEPT SATURN)
| Temperature °F (°C) | Ohms |
|---|---|
| 212 (100) | 177 |
| 194 (90) | 241 |
| 158 (70) | 467 |
| 122 (50) | 973 |
| 104 (40) | 1459 |
| 86 (30) | 2238 |
| 68 (20) | 3520 |
| 50 (10) | 5670 |
ECT TEMPERATURE-TO-RESISTANCE VALUES (SATURN)
| Temperature °F (°C) | Ohms |
|---|---|
| 284 (140) | 63-68 |
| 248 (120) | 104-113 |
| 220 (105) | 159-172 |
| 200 (94) | 215-235 |
| 180 (83) | 302-334 |
| 160 (72) | 430-480 |
| 140 (60) | 650-730 |
| 120 (49) | 980-1100 |
| 100 (38) | 1500-1700 |
| 80 (27) | 2400-2700 |
| 60 (16) | 3900-4500 |
| 40 (4) | 6600-8400 |
| 20 (-7) | 11,000-15,000 |
| 0 (-18) | 21,000-27,000 |
| -20 (-29) | 39,000-53,000 |
| -40 (-40) | 77,000-109,000 |
ECT TEMPERATURE-TO-RESISTANCE VALUES (EXCEPT SATURN)
| Temperature °F (°C) | Ohms |
|---|---|
| 212 (100) | 177 |
| 194 (90) | 241 |
| 158 (70) | 467 |
| 122 (50) | 973 |
| 104 (40) | 1459 |
| 86 (30) | 2238 |
| 68 (20) | 3520 |
| 50 (10) | 5670 |
TRANSAXLE RANGE SWITCH VALID INPUT COMBINATIONS
| Gear Selector | Scan Tool |
|---|---|
| Position | TR PABC Display |
| Park | P=O A=O B=X C=X |
| Reverse | P=X A=O B=O C=X |
| Neutral | P=O A=X B=O C=X |
| Drive 4 | P=X A=X B=O C=O |
| Drive 3 | P=O A=O B=O C=O |
| Drive 2 | P=X A=O B=X C=O |
| Drive 1 | P=O A=X B=X C=O |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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