The Air conditioner Control Module sets DTC B1687 when engine temperature sensor signal has not been received through the CAN signal.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check CAN signal | 1. Poor connection in power supply circuit of A/C Control Module 2. Open in A/C Control Module C- CAN communication line 3. Short to ground in C-CAN communication line 4. Short to battery in C-CAN communication line 5. Faulty Engine coolant temperature sensor 6. Faulty Engine system |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
No signal via CAN for 1.5 seconds or receiving Error value | |
Failsafe |
•
Regarded it as 28.4℉(-2℃) |
