HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0402 INVALID DATA RECEIVED FROM TCM
This is detected when CAN data from TCM is abnormal.
NOTE:
Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE">
Dtc u0401 invalid data received from ecm/pcm a
Dtc u0416 invalid data received from vehicle dynamics control moduleSnow tires
WARNING
When installing winter tires on the Subaru Ascent, it is absolutely essential
that all four tires are identical in the following characteristics.
Size
Speed rating
Load index
Circumference
Construction type
Manufacturer
Brand and tread pattern
Level of wear
...
Basic diagnostic procedure Procedure
INSTRUMENTATION/DRIVER INFO (DIAGNOSTICS) > Basic Diagnostic ProcedurePROCEDURE1. COMBINATION METERSTEPCHECKYESNO1.PERFORM CUSTOMER INTERVIEW.Using the Check List for Interview, ask the customer the condition of how trouble occurs. Check List for Interview > CHECK">Did you interview t ...
Access key - if access key does not operate properly
CAUTION
Keep metallic objects, magnetic
sources and signal transmitters
away from the area between the
access key and the push-button
ignition switch. They may interfere
with the communication between
the access key and the push-button
ignition switch.
The following functions may be inopera ...