Subaru LEGACY 2004 Service Manual page 720

LAN SYSTEM (DIAGNOSTICS)
4. CONDITIONS UNDER WHICH TROUBLE OCCURS
Driving condition
Check List for Interview
J At standstill (While idling)
J When the vehicle is running
J When accelerating
J Decelerating (With braking)
J Decelerating (Without braking)
J Flat road
J Uphill
J Downhill
J Gravel road
J Bumpy road
J Snowy road
Does it occur when operating any part?
Operated part:
Trouble Symptom:
Are other troubles occurred?
From where:
Trouble Symptom:
LAN(diag)-4
Vehicle speed km/h (MPH)
Acceleration km/h (MPH) to km/h (MPH)
Deceleration km/h (MPH) to km/h (MPH)
Deceleration km/h (MPH) to km/h (MPH)