Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 486 / 1164

AUTOMATIC TRANSMISSION -
Troubleshooting
23-26
INSPECTION PROCEDURE 2
MUT-
II
can not communicate with the A/T-ECU. Probable cause
It is suspected that this malfunction is caused by an open circuit in A/T-ECU power
supply circuit or diagnosis output circuit.
D Malfunction of harness or connector
D Malfunction of A/T-ECU
OK
Check trouble symptoms.
NG
Check the harness wire between the
A/T-ECU
and the diagnosis connector,
and repair if necessary.
OK
Check trouble symptoms.
NG
Check the harness wire between the
ignition switch and the A/T-ECU, and
repair if necessary.
NG
Repair
OK
Check the following connectors
:
B-12, B-10
OK
Check trouble symptoms.
NG
Replace the
A/T-ECU
.
OK
Check trouble symptoms.
NG
Check the harness wire between the
A/T-ECU
and the earth, and repair if
necessary.
OK
Measure at
A/T-ECU
connectors
B-
12
,
B-
10.
D Disconnect the connector, and
measure at the harness side.
D Continuity between terminal Nos.
12,
13, 25, 26, 72 -
body earth
OK: Continuity
NG
Check the following connectors:
B-12, B-10
NG
Repair
OK
Measure at A/T-ECU connector B-12.
D Disconnect the connector, and
measure at the harness side.
D Ignition switch: ON
D Voltage between Nos.
11, 24
and
body earth
OK:
Battery voltage
NG
Check the following connectors:
B-12, B-14, B-93, B-89
NG
Repair
Measure at diagnosis connector B-25
and A/T-ECU connectors B-12, B-10.
D Disconnect the connectors, and
measure at the harness side.
D Continuity between the following
terminals:
No.
1 (of diagnosi
s connector) and
23 (of B-12)
No. 7
(of diagnosi
s connector) and
63 (of B-10)
OK:
Continuity
NG
Check the following connectors:
B-12, B-10, B-14, B-102, B-25
NG
Repair