SCAN DATA
Note. Information contained in following tables 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. On systems using P-4 computers, parameter updates are more frequent. 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.
| 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) |
| AIR Divert Sol. | On/Off | On (Air To Switching Sol.); Off (Air To Atmosphere) |
| AIR Switching Sol. | On/Off | On (To Exhaust Manifold); Off (To Catalytic Converter) |
| BARO | Volts | 3.0-4.5 |
| Battery Voltage | Volts | 13.5-14.5 |
| Block Learn (LT) | Counts | 118-138 (128 Normal) |
| Canister Purge Sol. | On/Off | On/Engine Cold (Idle Some) |
| Clear Flood | On/Off | See Tester Manual |
| Coolant Fan(s) | On/Off | Off Below 216°F (102°C) |
| Coolant Temp. | °C | 85-105° (Norm. Temp.) |
| 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 |
| IAC | Counts | 0-50 |
| Ignition/Crank | On/Off | On With Ignition/Crank |
| Injector Pulse Width | Mil./Sec | .8-3.0 |
| Integrator (ST) | Counts | 110-145 (128 Normal) |
| Knock Retard | Counts | 0-255 |
| Knock Signal | Yes/No | Yes When Knock Exists |
| MAT (IAT) | °C | 10-90° |
| MAP | Volts | 1.0 (Idle) to 4.5 (WOT) |
| "Open/Closed Loop Status" | Ol/Cl | Closed/Open During Extended Idle |
| 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 |
| 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 | 1.25 (Idle) To 5.00 (WOT) |
| Throttle Angle | 0-100% | 0 (Idle) To 100 (WOT) |
| 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 |
MULTIPORT FUEL INJECTION (MFI)