Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0424 invalid data received from hvac control module

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0424 invalid data received from 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 data received from the A/C control panel is not normal.

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	Freeze

Time Needed for Diagnosis: 2 seconds

Dtc u0073 control module communication bus off

NOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure1. OUTLINE OF DIAGNOSIS (ENGINE TYPE FB)• Detect malfunction of CAN communication.• ...

Dtc u0423 invalid data received from instrument panel cluster control module

NOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure1. OUTLINE OF DIAGNOSIS• Detect malfunction of CAN communication.• Judge as NG whe ...

Other materials:

Installation
1. Set the air cleaner element and the air cleaner case (rear).CAUTION:Be sure to use SUBARU genuine air cleaner element depending on the engine type when replacing the air cleaner elements. Using other air cleaner element may affect the engine performance.NOTE:• Install the air cleaner elemen ...