Steering - Control Unit Fail-Safe Function Revised

91mitsubishi05

NO. TSB-91-37-006 REVISION

DATE April, 1991

MODEL 1986-87 Galant, 1989-91 Galant


SUBJECT: EPS FAIL-SAFE FUNCTION -
SERVICE MANUAL REVISION


TSB Revision TSB 91-37-006

This Technical Service Bulletin supersedes bulletin number TSB-91-37-006, which should be discarded.

PURPOSE

This Technical Service Bulletin (TSB) describes a revised fail-safe function for the redesigned Electronic Power Steering (EPS) control unit. As a reference to this TSB, write the revision number in the TSB Revision box located near the bottom of each affected
Service Manual page.


AFFECTED SERVICE MANUALS

1986 Galant, Pages 19-8, 19-31, and 19-32.
1987 Galant, Volume 1, Pages 19-10 and 19-18.
1989/90/91 Galant, Volume 1, page 37A-19.

Figure 1:

DESCRIPTION

On EPS control units produced after mid-December, 1990, the fail-safe function does not activate until the engine has been run at 2300 RPM for 55 seconds. Earlier control units activated after 15 seconds.

The new EPS control units can be recognized from previous units by a slight change on the label (Refer to Figure 1).


The new EPS control units will function on all 1986-87 and 1989-91 Galant vehicles. Control units originally supplied with these earlier vehicles cannot be used on vehicles produced after mid-December, 1990.


SERVICE MANUAL REVISION

To provide complete Service Manual information, add the following notation to the pages indicated:





1986 Galant, Page 19-8. Add a note as shown:





1986 Galant, Page 19-31. Add a note as shown:





1986 Galant, Page 19-32. Add a note as shown:





1987 Galant, Volume 1, Page 19-10. Add a note as shown:





1987 Galant, Volume 1, Page 19-18. Add a note as shown.





1989/90/91 Galant, Volume 1, Page 37A-91. Add a note as shown.