Mitsubishi Eclipse 1990 Service Manual page 581

INSPECTION PROCEDURE 1
Communication with scan tool is not possible.
tion with all systems is not possible.)
[Comment]
The cause is probably defect in the power supply system [including ground) for the on-board
diagnostic test mode line.
OK
Measure at the data link connector
between 4 and ground
5 a n d g r o u n d
Replace the scan tool.
INSPECTION PROCEDURE 2
Scan tool communication with ECM is not possible.
[Comment]
One of the following causes may be suspected.
No power supply to ECM
Defective ground circuit of ECM
D e f e c t i v e E C M
Improper communication line between ECM and scan tool
Check the
Check trouble symptom.
Check the harness wire between ECM and data link connector.
(Refer to
INSPECTION PROCEDURE 27.)
ENGINE (TURBO)
AND ENGINE>
Check the harness wire between
data link connector
ground. Repair, if necessary.
OK
NG
TSB Revision
M a l f u n c t i o n
and
P r o b a b l e
Open circuit between ECM
nector
NG
Repair
NG
Repair
,
c o n n e c t o r
.
of power
of the ECM
data link con-