Speed/RPM
From HackTheIBus
[edit]
Description
The speed and RPM message is sent from the instrument cluster IKE to all devices (global, GLO). It represents the current vehicle speed in kmph and the current engine RPM.
[edit]
Format
| Message code | 0x18 |
|---|---|
| Message length | 7 bytes |
| Data size | 2 bytes |
| Frequency | every 2 sec |
| DB1 | DB2 |
|---|---|
| Speed | RPM |
Speed = actual speed in kmph / 2. To calculate speed, multiply DB1 x 2.
RPM = actual RPM / 100. To calculate RPM , multiply DB2 x 100.
[edit]
Example
80 05 BF 18 1A 0E 22
"IKE --> GLO : Speed/RPM: Speed 52 km/h, 1,400 RPM"
| Meaning | IKE | len | GLO | type | Speed | RPM | CS |
|---|---|---|---|---|---|---|---|
| Value | 80 | 0F | BF | 18 | 1A | 0E | 22 |
Speed = DB1 = 0x1A (26dec) x 2 = 52 kmph
RPM = DB2 = 0x0E (14dec) x 100 = 1,400 RPM
