Data Stream
From SaturnWiki
Datastream
Diagnostic stream
- Work in progress
| Description | Start Location | Number of bits | Scale Factor | Scale Offset | Scale Invert | Scale Reverse | Scale Units | Notes |
|---|---|---|---|---|---|---|---|---|
| Not Used | 2 | 16 | 1 | 0 | FALSE | FALSE | ||
| A/D COOLANT TEMPERATURE | 3 | 8 | 0.75 | -40 | FALSE | TRUE | °C | |
| STARTUP COOLANT TEMPERATURE | 4 | 8 | 0.75 | -40 | FALSE | TRUE | °C | |
| A/D TPS | 5 | 8 | 0.019608 | 0 | FALSE | FALSE | V | |
| THROTTLE POSITION LOAD AXIS VARIABLE | 6 | 8 | 0.392156 | 0 | FALSE | FALSE | % | |
| VEHICLE SPEED | 9 | 8 | 1 | 0 | FALSE | FALSE | MPH | |
| A/D O2 | 10 | 8 | 0.00434 | 0 | FALSE | FALSE | V | |
| INJECTOR PULSE WIDTH | 12 | 16 | 0.007629 | 0 | FALSE | FALSE | ms | |
| BLOCK LEARN MULTIPLIE | 13 | 8 | 1 | 0 | FALSE | FALSE | Counts | |
| INTEGRATOR | 14 | 8 | 1 | 0 | FALSE | FALSE | Counts | |
| DESIRED IDLE RPM | 15 | 8 | 12.5 | 0 | FALSE | FALSE | RPM | |
| A/D BAROMETRIC PRESSURE | 18 | 8 | 0.3125 | 20 | FALSE | FALSE | kPa | |
| A/D BATTERY VOLTAGE | 19 | 8 | 0.1 | 0 | FALSE | FALSE | V | |
| KNOCK RETARD | 22 | 8 | 0.175781 | 0 | FALSE | FALSE | deg | |
| ENGINE RUN TIME | 24 | 16 | 0.00625 | 0 | FALSE | FALSE | sec | |
| A/D EGR POS | 25 | 8 | 0.019608 | 0 | FALSE | FALSE | V | |
| Status Word | 31 | 8 | 1 | 0 | FALSE | FALSE | ||
| ECU Software Version | 49 | 16 | 1 | 0 | FALSE | FALSE | ||
| A/D MANIFOLD ABSOLUTE PRESSURE | 17 | 8 | 0.3125 | 20 | FALSE | FALSE | kPa | |
| A/D INTAKE AIR TEMPERATURE | 16 | 8 | 0.75 | -40 | FALSE | TRUE | °C | |
| 26 | 8 | 1 | 0 | FALSE | FALSE | |||
| 27 | 8 | 0 | 0 | FALSE | FALSE | |||
| 28 | 8 | 1 | 0 | FALSE | FALSE | |||
| 29 | 8 | 1 | 0 | FALSE | FALSE | |||
| 30 | 8 | 1 | 0 | FALSE | FALSE | |||
| Status Word | 32 | 8 | 1 | 0 | FALSE | FALSE | ||
| Status Word | 33 | 8 | 1 | 0 | FALSE | FALSE | ||
| 34 | 8 | 1 | 0 | FALSE | FALSE | |||
| 35 | 8 | 1 | 0 | FALSE | FALSE | |||
| 36 | 8 | 1 | 0 | FALSE | FALSE | |||
| 37 | 8 | 1 | 0 | FALSE | FALSE | |||
| 38 | 8 | 1 | 0 | FALSE | FALSE | |||
| 39 | 8 | 1 | 0 | FALSE | FALSE | |||
| DTC FLAGS | 40 | 8 | Bit 0 = UNKNOWN
Bit 1 = EGR System Fault Bit 2 = UNKNOWN Bit 3 = UNKNOWN Bit 4 = UNKNOWN Bit 5 = UNKNOWN Bit 6 = IAT Low Bit 7 = TPS Voltage LOW |
|||||
| DTC Flags | 41 | 8 | Bit 0 = UNKNOWN
Bit 1 = UNKNOWN Bit 2 = UNKNOWN Bit 3 = UNKNOWN Bit 4 = UNKNOWN Bit 5 = UNKNOWN Bit 6 = UNKNOWN Bit 7 = MAP Voltage Low |
|||||
| 42 | 8 | 1 | 0 | FALSE | FALSE | |||
| 43 | 8 | 1 | 0 | FALSE | FALSE | |||
| 44 | 8 | 1 | 0 | FALSE | FALSE | |||
| 45 | 8 | 1 | 0 | FALSE | FALSE | |||
| 46 | 8 | 1 | 0 | FALSE | FALSE | |||
| 47 | 8 | 1 | 0 | FALSE | FALSE | |||
| Not Used: PROM Date Code/Sequence Number | 53 | 32 | 1 | 0 | FALSE | FALSE | ||
| ECU Software Version Checksum | 55 | 16 | 1 | 0 | FALSE | FALSE | ||
| Calibration Software Version | 57 | 16 | 1 | 0 | FALSE | FALSE | ||
| Not Used: Calibration Date Code/Sequence Number | 61 | 32 | 1 | 0 | FALSE | FALSE | ||
| Calibration Software Checksum | 63 | 16 | 1 | 0 | FALSE | FALSE | ||
| Datastream Checksum | 64 | 8 | 1 | 0 | FALSE | FALSE | ||
| ENGINE SPEED | 8 | 16 | 1966080 | 0 | TRUE | FALSE | RPM | |
| DEGREE OF TIMING | 21 | 16 | 0.175781 | 0 | FALSE | FALSE | deg | |
Memory Dump
| Area | Location |
|---|---|
| EPROM | $8000-$FFFF |
| RAM | $0000-$01FF |
| CPU EEPROM | $6800-$6FFF |
| Memory Mapped IO Registers | $1000-$103F |
| ALL | $0000-$FFFF |
Utility Commands
| Function | ALDL Command | Notes |
|---|---|---|
| AC ON | $08,$08,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| AC OFF | $08,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| FORCE IDLE RPM | $00,$00,$02,$02,$00,$00,$00,$00,$03,$XX,$00,$00 | $XX - is hex code for desired idle speed RPM*0.08=$XX |
| Turn Off Check Engine Indicator | $04,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Turn On Check Engine Indicator | $04,$04,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Turn Off Fuel Pump | $40,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Turn On Fuel Pump | $40,$40,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Forced Air/Fuel Ratio | $00,$00,$00,$00,$00,$00,$00,$00,$04,$00,$XX,$00 | $XX is desired ratio. **CAUTION too lean for too long will damage your engine** |
| Bypass Spark Mode | $00,$00,$08,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Forced Spark Advance BTDC | $00,$00,$00,$00,$00,$00,$00,$00,$08,$00,$00,$XX | $XX is desired spark advance, this overrides all spark management |
| Set Idle RPM Rev Limit | $00,$00,$02,$02,$00,$00,$00,$00,$03,$FF,$00,$00 | Sets the desired idle to maximum which is about (1,590 rpm) |
| Turn Injectors Off | $20,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 | |
| Retard Spark Timing | $00,$00,$00,$00,$00,$00,$00,$00,$38,$00,$00,$XX | $XX is desired additional retard. |
| Set RPM Rev Limit | $00,$00,$00,$00,$00,$00,$04,$XX,$00,$00,$00,$00 | $XX is desired REV limit |
| Add Spark Advance | $00,$00,$00,$00,$00,$00,$00,$00,$18,$00,$00,$XX | $XX is desired additional advance |
| Desired Idle Speed | $00,$00,$00,$00,$00,$00,$18,$00,$XX,$00,$00,$00 | $XX is desired idle speed |
