The A/C Control Unit will only update the Ambient Temperature Display when vehicle speed is received from the ESC through the CAN lines.
DTC B1686 sets if the vehicle speed signal has not been received through the CAN lines.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check CAN signal | 1. Faulty WSS. 2. CAN communication. |
Enable Conditions |
•
Ignition ON | |
Threshold value |
•
No signal via CAN for 1.5 seconds or Error value received. | |
Failsafe |
•
Substitued WSS = 0 MPH |