Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1186

Code No. P1500 Alternator FR terminal system
Inspection Range
D Engine speed: More than 50 r/min
Evaluation Conditions
D The input voltage from the alternator FR terminal is between 4.8 V and 5.2 V
or is the battery voltage for 20 seconds.
Check the following connector:
B-14
OK
Measure at the B-14 middle
connector.
D Disconnect the connector to
measure at the female connector
side.
D Ignition switch: ON
D Voltage between terminal No.5
and earth.
OK: 4.9 - 5.1 V
OK
Measure at the B-14 middle
connector.
D Using the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
D Ignition switch: ON
D Voltage between terminal No.5
and earth.
OK: 5 - 6 V
OK
Measure at the B-14 middle
connector.
D Using the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
D Engine: Idling (After warm-up)
D Radiator fan: OFF
D Voltage between terminal No. 5
and earth.
OK: The voltage drops when
the headlamp is turned
from OFF to ON.
OK
Check the trouble symptoms.
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
MPI -
Troubleshooting
NG
Repair
NG
Check the following connector:
C-122
Check the harness between the
middle connector and engine-ECU.
D Check for short circuit of the
output wire.
Check the trouble symptoms.
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
NG
Check the following connector:
B-22
Check the harness between the
alternator and middle connector.
D Check for short circuit of the
output wire.
Replace the alternator.
NG
Check the following connector:
B-22
Check the harness between the
alternator and middle connector.
D Check for damage of the output
wire.
Check the harness between the middle
connector and engine-ECU.
D Check for damage of the output
wire.
Check the trouble symptoms.
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
NG
Replace the engine-ECU.
Probable cause
D Open circuit in the alternator FR terminal circuit
D Malfunction of engine-ECU
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
13A-49
Repair
Repair
Replace the engine-ECU.
Repair
Repair
Repair
Repair
Repair
Replace the alternator.