The A/C Control Unit may increase or decrease the variable compressor output using the engine RPM signal received through the CAN lines.
DTC B1685 sets if the engine RPM signal has not been received through the CAN lines.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check CAN signal | 1. Faulty Engine RPM 2. CAN communication |
Enable Conditions |
•
Ignition ON | |
Threshold value |
•
No signal via CAN for 1.5 seconds or Error value received | |
Failsafe |
•
Substitued Engine RPM value as '0' |
