The A/C Control Module receives the A/C Pressure Transducer (APT) Sensor input from the PCM through CAN lines. If the pressure reading is low the A/C Control Unit will shut off the A/C Compressor until the pressure is within range.
DTC B1672 will set if APT signal has not been received through the CAN line.
Item
Detecting Condition
DTC Strategy
Check CAN signal.
Faulty APT sensor.
CAN communication.
Faulty APT Sensor wiring.
Enable Conditions
Ignition ON
Threshold value
No CAN signal for 1.5 seconds or Error value received.
Failsafe
Substitued APT value as '0'