Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0422 invalid data received from body control module

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0422 invalid data received from body 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 body integrated unit 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 BIU	Freeze

Time Needed for Diagnosis: 2 seconds

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Other materials:

Removal
1. Disconnect the ground terminal from battery sensor. NOTE2. Remove the under cover. Front Under Cover > REMOVAL3. Drain the engine oil. Engine Oil > REPLACEMENT4. Disconnect the oil level switch connector from the engine harness, and remove the clip (A) securing the harness.5. Remove clip (A) f ...