Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 503

13B-22
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-II is not possible.
(Communication with all systems is not possible.)
The cause is probably a defect in the power supply system (including earth) for
the diagnosis line.
Measure at the diagnosis connector
(16-pin) B-35.
Voltage between 16 and earth
OK: Battery voltage
OK
Measure at the diagnosis connector
(16-pin) B-35.
Continuity between 4 and earth
Continuity between 5 and earth
OK: Continuity
OK
Replace the MUT-II.
INSPECTION PROCEDURE 2
MUT-II communication with engine-ECU is impossible.
One of the following causes may be suspected:
No power supply to engine-ECU.
Defective earth circuit of engine-ECU.
Defective engine-ECU.
Improper communication line between engine-ECU and MUT-II
Check the following connectors: B-09, B-19, B-35, B-60X
Check trouble symptom.
Check the harness wire between engine-ECU and diagnosis con-
nector.
Repair
NOTE
Though the above inspection has been performed, if trouble symptom does not disappear, check the multi
center display, and replace it if necessary.
MPI –
NG
Check the following connectors:
B-75, B-81
Check trouble symptom.
NG
Check the harness wire between the
diagnostic connector (16-pin) and
earth, and repair if necessary.
OK
NG
NG
Troubleshooting
Probable cause
Malfunction of the connector
Malfunction of the harness wire
NG
OK
NG
Probable cause
Malfunction of engine-ECU power supply circuit
Malfunction of engine-ECU
Open circuit between engine-ECU and diagnosis
connector
NG
Repair
OK
Check the harness wire
between engine-ECU
and earth.
OK
Check the power supply and ignition switch-IG system. (Refer
to P.13B-41, INSPECTION PROCEDURE 25.)
Repair
Check the harness wire between the
power supply and diagnostic connector
(16 pin), and repair if necessary.
NG
Repair