Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
techtalk:evo:elec04 [2021/08/18 19:58] ixl2relax [SDB - Serial Data Bus] |
techtalk:evo:elec04 [2021/08/18 20:05] ixl2relax [SDB - Serial Data Bus] |
||
---|---|---|---|
Line 15: | Line 15: | ||
The ICM, TSM & Speedo/Tach regularly communicate their current status to one another. When all operating parameters on the serial data line are within specifications, a state of health message is sent between the components. | The ICM, TSM & Speedo/Tach regularly communicate their current status to one another. When all operating parameters on the serial data line are within specifications, a state of health message is sent between the components. | ||
- | A DTC of U1016 (Diagnostic Code) is set when the ICM can't send that 'state of health message'. | + | A DTC of U1016 (Diagnostic Code) is set when the ICM can't send that 'state of health message'.\\ |
- | A DTC of U1255 is set when no messages are communicated at power up. | + | --- That code is also set if there was communications, but it stopped at some point.\\ |
- | A DTC of U1016 is set if there was communications, but it stopped at some point. | + | A DTC of U1097 is set by the Speedo if it can't send the 'state of health message'. |
+ | --- That code is also set if there was communications, but it stopped at some point.\\ | ||
+ | A DTC of U1255 is set when no messages are communicated at power up.\\ | ||
The SDB is designed upon a standard SAE serial communication protocol callded "J1850". The digital data is transmitted and received on a single wire at around 10.4 Kbps. This protocol was used thru the 2013 model year. | The SDB is designed upon a standard SAE serial communication protocol callded "J1850". The digital data is transmitted and received on a single wire at around 10.4 Kbps. This protocol was used thru the 2013 model year. |