In case of engine cold starting, Air conditioner control module receies engine coolant temperature sensor signal through the CAN signal so that Mode is changed to DEF with controlling mode actuator.
Air conditioner Control Module sets DTC B1687 if engine temperature sensor signal has not been received through the CAN signal.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check CAN signal | 1. Faulty engine coolant temperature sensor 2. CAN communication |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
No signal via CAN for 0.1 seconds or receiving Error value | |
Failsafe |
•
Regarded it as -2℃(28.4℉) |
