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.
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HOMESERVICE MANUALSBUICK1995REGAL GRAN SPORTREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 3.1LSELF-DIAGNOSTIC SYSTEMSCAN DATA
1995 Buick Regal Gran Sport
Scan Data
1995 Buick Regal Gran SportSECTION Scan Data
NOTE:
Information contained in SCAN DATA
is typical of readings taken on vehicle with engine idling, upper radiator hose hot, closed throttle, transmission in Park or Neutral, "closed loop" status achieved and all accessories off (except as noted in tables). Data parameters are updated a minimum of every 1 1/4 seconds, more often on most models. Not all devices and systems are used on all models; following lists only represent most commonly used parameters. For additional information, refer to owner manual furnished with tester.
SCAN DATA
| Tester Position | Units Measured | Nominal Value | ||
|---|---|---|---|---|
| A/C Clutch | On/Off | On With A/C | ||
| A/C Request | Yes/No | Yes With Request | ||
| BARO | Volts | 3.0-4.5 | ||
| Battery Voltage | Volts | 13.5-14.5 | ||
| Brake Switch | App/Rel | Applied with Brakes On | ||
| Canister Purge Sol. | On/Off | On/Engine Cold (Idle Some) | ||
| Clear Flood | On/Off | See Tester Manual | ||
| Coolant Fan(s) | On/Off | On With Command | ||
| Coolant Temp. | °C | 85-105° (Norm. Temperature) | ||
| Crank RPM | RPM | 100-900 | ||
| Cross Counts | Counts | 0-255 | ||
| EGR Solenoid | On/Off | On When Energized | ||
| EGR Duty Cycle | 0-100% | 0/Closed; 100/Fully Open | ||
| Fan Relay | On/Off | On When Energized | ||
| Fan Request | On/Off | On With Request | ||
| Fuel Back-Up | Yes/No | Yes When Engaged | ||
| Fuel Trim (ST) | Counts | 110-150 ((1) 128 Normal) | ||
| Fuel Trim (LT) | Counts | 110-150 ((1) 128 Normal) | ||
| IAC | Counts | 0-50 | ||
| Ignition/Crank | On/Off | On With Ignition/Crank | ||
| Injector Pulse Width | Mil./Sec | .8-3.0 | ||
| Intake Air Temp. | °C | 10-90° | ||
| Knock Retard | Counts | 0-255 | ||
| Knock Signal | Yes/No | Yes When Knock Exists | ||
| MAP | Volts | 1.0 (Idle) to 4.5 (WOT) | ||
| "Open/Closed Loop Status" | Ol/Cl | Closed/Open During | ||
| O2 Sensor | Millivolts | 100 (Lean) To 999 (Rich) | ||
| P/N Switch | P/N/RDL | Park/Neutral | ||
| P/S Switch | Norm/Hi | Normal | ||
| PROM I.D. | PROM # | Original Factory Number | ||
| QDM | Hi/Lo | Lo Energized | ||
| RPM | RPM | Spec. +/-25 RPM Drive (A/T); Spec. +/-50 RPM Neut. (M/T) | ||
| Spark Advance | Degrees | Varies | ||
| TCC | On/Off | Off (On With Command) | ||
| TP Sensor | Volts | 1.00 (Idle) To 5.00 (WOT) | ||
| Throttle Angle | 0-100% | 0 (Idle) To 100 (WOT) | ||
| Throttle Switch | Open/Closed | Open At Off Idle | ||
| Trans. Fluid Temp. | °C | 100 (Normal) | ||
| Trouble Codes | Code No. | No Codes | ||
| Upshift Light (M/T) | On/Off | Off | ||
| VSS Or MPH | MPH | 0-Actual | ||
| 1st Gear Switch | On/Off | On/1st Gear Only | ||
| 3rd Gear Switch | On/Off | On/3rd & 4th Gear | ||
| 4th Gear Switch | On/Off | On/4th Gear | ||
|
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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.