Scan Data Tables - Full Function CARBURETED
NOTE:
Information in the following table is typical 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 every 1 1/4 seconds. On systems using P-4 computers, parameter updates are virtually instantaneous. Not all devices & systems are used on all models.
FULL FUNCTION (CARBURETED)
| Tester Position | Units Measured | Nominal Data Value |
|---|---|---|
| A/C Clutch | On/Off | Off (On with A/C). |
| A/C Low Freon Sw. | On/Off | On when freon low. |
| A/C Request | Yes/No | No/Yes (with request). |
| AIR Divert Sol. | On/Off | On (air to switching solenoid). Off (air to atmosphere). |
| AIR Switching Sol. | On/Off | On (to exhaust manifold) Off (to catalytic converter). |
| BARO | Volts | 3-4.5. |
| Battery Voltage | Volts | 13.5-14.5. |
| Canister Purge Sol | On/Off | On engine cold (idle some). |
| Coolant Fan | On/Off | Off below 216°F (102° C). |
| Coolant Temp | °C | 85-105° (norm. temp.). |
| Cross Counts | Counts | 0-255. |
| EFE Sol./Relay | On/Off | On below 85°C. |
| EGR Solenoid | On/Off | On when energized. |
| EGR Duty Cycle | 0-100% | 0/closed-100/fully open. |
| Ignition/Crank | On/Off | On with ignition/crank. |
| ILC Solenoid | On/Off | On extended/Off retracted. |
| ISC Motor | On/Off | On controls idle, Off no control. |
| Knock Retard (ESC) | Counts | 0-255. |
| Knock Signal | Yes/No | Yes when knock exists. |
| MAP | Volts | 1 (idle) to 4.5 (WOT). |
| M/C Dwell | Degrees | 10-50° varying. |
| Nose Switch | On/Off | On when depressed. |
| O2 Sensor | Millivolts | 100 (lean) to 999 (rich) |
| Open/Closed | Ol/Cl | Cl/Ol during extended idle. |
| 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 (auto.), Spec. +/-50 RPM Neut. (man.). |
| Spark Advance | # of Deg | Varies. |
| TCC | On/Off | Off (On with command). |
| Throttle Angle | 0-100% | 0. |
| Throttle Kicker | On/Off | On w/ A/C & deceleration. |
| TPS | Volts | .5 (closed) to 5.0 (WOT.) |
| Trouble Codes | Code # | No Codes. |
| Turbo Boost | On/Off | On when activated. |
| VAC | Volts | 4.5 (idle) to 1 (WOT) |
| VSS or MPH | MPH | 0-actual. |
| WOT Switch | On/Off | On at WOT. |
| 3rd Gear Switch | On/Off | On/3rd & 4th gear. |
| 4th Gear Switch | On/Off | On/4th gear. |
NOTE:
In some of the diagnostic and trouble shooting charts the Assembly Line Data Link (ALDL) may also be referred to as the Assembly Line Communication Link (ALCL). This is the same test point for connection of aftermarket "SCAN" testers.