

System diagram

Precaution
System descriptionEcm communication circuit malfunction
Description
The circuit is used to send trc and vsc control information from the skid
control ecu to the ecm, and
engine control information from the ecm to the skid control ecu.
Inspection procedure
Hint:
Check that the part numbers of the installed ecm and skid control ecu are
cor ...
Basic repair hint
Hints on operations
1
Attire
Always wear a clean uniform.
A hat and safety shoes must be worn.
2
Vehicle protection
Prepare a grille cover, fender cover, seat cover and floor mat
before starting the
operation.
3
Safe opera ...
Check for intermittent problems
Hint:
Inspect the vehicle's ecm using check mode. Intermittent
problems are easier to detect with the intelligent tester when
the ecm is in check mode. In check mode, the ecm uses 1
trip detection logic, which is more sensitive to malfunctions
than normal mode (default), which uses 2 trip detec ...