If Engine Coolant Temperature CAN signal error is received or CAN signal is not received, A/C control module sets DTC B1687.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN Signal Monitoring | 1. Poor Connector Connection 2. Defected CAN Communication Circuit 3. Defected PCM 4. Defected A/C Control Module |
Enable Conditions |
•
Ignition Switch "ON" | |
Threshold value |
•
CAN signal is not received for 1.5 sec or Error signal is received | |
Fail Safe |
•
Engine Coolant Temperature value replaced by "-2℃(-19℉)" | |
Clear Condition |
•
Ignition Switch "OFF" or Voltage Returns to Normal State |
