Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0164 lost communication with hvac control module

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0164 lost communication with hvac control module

NOTE:

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure

1. OUTLINE OF DIAGNOSIS

• Detect malfunction of CAN communication.

• Judge as NG when CAN communication failure occurs with the A/C control panel.

2. EXECUTION CONDITION

Secondary Parameters	Execution condition
Turbine shaft speed	> 0 rpm
or
D range switch	ON

3. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria	Threshold Value
CAN data from A/C control panel	Lost

Time Needed for Diagnosis: 2 seconds

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Caution
• Prior to starting work, pay special attention to the following:1. Always wear work clothes, a work cap, and protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary.2. Protect the vehicle using a seat cover, fender cover, etc.3. Prepare the service tools, clean cl ...