Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1157

13A-20
From the previous page
OK
Measure at the B-118 engine coolant
temperature sensor connector.
D Disconnect the connector to
measure at the harness side
(1) Voltage between terminal No. 1
and the earth.
(Ignition switch: ON)
OK: 4.5 - 4.9 V
(2) Resistance between terminal No.
2 and earth
OK: Less than 2 Ω
OK
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MPI -
Troubleshooting
(1) NG
Measure at the C-115 engine-ECU
connector.
D Measure the engine-ECU terminal
voltage.
D Disconnect the B-118 engine
coolant temperature sensor
connector.
D Ignition switch: ON
D Voltage between terminal 83 and
the earth.
OK: 4.5 - 4.9 V
Check the following connector:
C-115
Check the harness between the engine
coolant temperature sensor and
engine-ECU.
D Check for short-circuit of the
output wire.
MUT-II Data list
D No. 21 Engine coolant
temperature sensor
OK: When cool, more or less
the same as the ambient
temperature (air tempera-
ture) When warm,
80 - 120_C
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
(2) NG
Check the following connector:
C-115
Check the harness between the engine
coolant temperature sensor and
engine-ECU.
D Check for disconnection and
damage of the earth wire.
MUT-II Data list
D No. 21 Engine coolant
temperature sensor
OK: When cool, more or less
the same as the ambient
temperature (air tempera-
ture) When warm
80 - 120_C
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
NG
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check the following connector:
C-115
OK NG
Repair
Check and repair the harness between
the engine coolant temperature sensor
and engine-ECU.
D Check for disconnection of the
output wire.
Repair
Repair
Replace the engine-ECU.
Repair
Repair
Replace the engine-ECU.