Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Normal Operation and Fault Conditions
With the ignition ON, the FCIM sends messages to the ABS module through the GWM over the HS-CAN3. If the ABS module does not receive these messages within a certain time frame, the module sets DTCs. For information on the messages sent to the ABS module by the FCIM module, refer to the Network Message Chart in Description and Operation in the Anti-Lock Brake System (ABS) and Stability Control article.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0164:87 | Lost Communication With HVAC Control Module: Missing Message | This DTC sets when the ABS module does not receive the selectable drive mode messages from the HVAC module in the alloted time. This can be due to a HVAC module failure, a circuit failure on the network or an excessive load on the network. |
| U0424:00 | Invalid Data Received From HVAC Control Module: No Sub Type Information | This DTC sets in the ABS module when the auto hold switch status message of 'faulty' is received from the HVAC module. |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.