Mitsubishi FUEL Manual page 143

Code No. P1500 Alternator FR terminal system
Range of Check
D Engine speed: 50 r/min or more
Set Conditions
D Input voltage from the alternator FR terminal is system voltage for 20
seconds.
Check the following connector:
B-31
OK
Measure at intermediate connector
B-31.
D Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
D Ignition switch: ON
D The voltage between terminal 4
and earth
OK: 9 - 10 V
OK
Measure at intermediate connector
B-31.
D Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
D Engine: Idling (After warming up)
D Radiator fan: Not operating
D The voltage between terminal 4
and earth
OK: The voltage drops when
the headlamps are turned
on.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
MPI <6A1> -
Troubleshooting
NG
Repair
NG
Measure at engine-ECU connector
C-167.
D Measure the voltage at the
engine-ECU terminal.
D Ignition switch: ON
D The voltage between terminal 52
and earth
OK: 9 - 10 V
Check the following connector:
C-167
Check the harness wire between the
intermediate connector and the
engine-ECU.
Check the trouble symptoms.
NG
Check the following connector:
B-38
Check the harness wire between the
alternator and the intermediate
connector.
Check the following connector:
C-167
Check the harness wire between the
intermediate connector and the
engine-ECU.
Check the trouble symptoms.
Replace the alternator.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
Probable cause
D Open circuit in alternator FR terminal circuit
D Malfunction of engine-ECU
NG
NG
NG
OK
NG
OK
NG
NG
OK
NG
OK
NG
OK
NG
OK
NG
13A-143
Check the following connector:
C-167
OK NG
Repair
Check the harness wire between the
intermediate connector and the
engine-ECU, and repair if necessary.
Repair
Repair
Replace the engine-ECU.
Repair
Repair
Replace
Repair