Diagnostic Test
WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
- With the scan tool, read active DTCs.
Is the DTC active?
Yes
- Perform the U0164-00-Lost Communication with HVAC Control Module in the BCM. Refer to the DTC INDEX - 1500 article .
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .