CAN communication Line consists of Low and High line so that each ECU can communicate their information for each other.
In order to adopt ABS/ESP ECU control for SPAS, SPAS and ABS/ESP ECU communicate each other.
The SPAS ECU check the CAN communication line for normal control of the ABS/ESP. and if the CAN communication is abnormal, the DTC is set.
Between LOW and HIGH, if only the one is open or short to ground, the SPAS ECU could communicate with the ABS/ESP.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Status for receving CAN message from ABS/ESP ECU | 1. Poor Connection 2. ABS/ESP ECU |
Enable Conditions |
•
IG ON. | |
Threshold vlaue |
•
SPAS ECU receives Invalid messages from ABS/ESP ECU | |
Diagnostic Time |
•
Invalid CAN messages for more than 0.5 sec. | |
DTC Erasing Time |
•
- |
