U0164 Lost communication with HV AC control module
When monitored U0164 code:
- Continuously when the ignition is on.
- Battery voltage between 10 and 16 volts.
- Ignition off draw (IOD) fused installed.
- Totally integrated power module (TIPM) is configured correctly.
Set condition this DTC the Bus messages not received from the HV AC control module for approximately two to five second.
Possible causes U0164 code:
- Can bus circuits open or shorted
- DTCs related to battery voltage, ignition, or vin messages
- HV AC control module power and ground
- TIPM not configured correctly
- HVAC control module
- Module that set this DTC
Diagnostic test U0164 code
Verify the diagnostic trouble code (DTC) is active
Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs.
Is this DTC active ?
Yes, refer to totally integrated power (TIPM) diagnosis and testing and perform the U0164 lost communication with HV AC control module diagnostic procedure.
No, refer to non DTC diagnostics/communication diagnosis and testing and perform the stored lost communication DTCs diagnostic procedure.
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