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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 42 (ENGINE CONTROLS - TESTS W/CODES - 5.0L)SELF-DIAGNOSTIC SYSTEMSCAN TESTER DATA
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Scan Tester Data
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Scan Tester Data
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1995 GMC Vandura, 1995 GMC Rally, 1995 GMC Pickup, 1995 Chevrolet Sportvan, and 1995 Chevrolet Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Information contained in the following table is typical of readings taken on vehicle with engine idling, upper radiator hose hot, throttle closed, transmission in Park or Neutral, closed loop status achieved and all accessories off (except as noted in tables). Not all devices and systems are used on all models. For additional information, see tester owner's manual.
SCAN TESTER DATA
| Tester Position | Units Measured | Nominal Value |
|---|---|---|
| A/C Clutch | On/Off | Off (On With A/C) |
| A/C Request | Yes/No | No/Yes (With Request) |
| Battery Voltage | Volts | 13.5-14.5 |
| Clear Flood | On/Off | See Tester Manual |
| Coolant Temp. | °C | 85-105° (Norm. Temp.) |
| Crank RPM | RPM | 100-900 |
| Cross Counts | Counts | 0-255 |
| Desired RPM | RPM | ECM Desired RPM |
| EGR Actual | 0-100% | 0/Closed-100/Fully Open |
| EGR Desired | 0-100% | 0/Closed-100/Fully Open |
| EGR Duty Cycle | 0-100% | 0/Closed-100/Fully Open |
| Fuel Trim Cell | Cell# | 0 |
| Fuel Trim Enable | Yes/No | No |
| Fuel Trim LT | Counts | 118-138 (128 Normal) |
| Fuel Trim ST | Counts | 110-145 (128 Normal) |
| IAC | Counts | 0-50 |
| IAT | °C | 10-90° |
| Injector Pulse Width | Mil./Sec | .8-3.0 |
| KS Retard | Deg. | 12 |
| Knock Signal | Yes/No | Yes When Knock Exists |
| MAP | Volts | 1 (idle) To 4.5 (WOT) |
| Open/Closed Loop Status | Ol/Cl | Closed/Open During Extended Idle |
| Oxygen 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 |
| RPM | RPM | Spec. +/-25 RPM Drive (A/T) |
| " | " | Spec. +/-50 RPM Neut. (M/T) |
| Spark Advance | Deg. | 0-20 |
| TCC | On/Off | Off (On With Command) |
| TPS | Volts | .45 (Idle) To 5.0 (WOT) |
| Throttle Angle | 0-100% | 0 (Idle) To 100 (WOT) |
| Trouble Codes | Code # | No codes |
| Upshift Light (M/T) | On/Off | Off |
| VSS Or MPH | MPH | 0-Actual |
RENDER: 1.0x
NO RELATED
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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.