Mitsubishi Lancer Evolution 7. Manual — part 197
MPI -
Troubleshooting
13A-87
Inspection Procedure 24
Radiator fan control relay system
Probable cause
When the engine control relay turns ON, the radiator fan control relay turns ON
simultaneously, and power is supplied to the fan controller.
The radiator fan motor is driven when the fan motor drive signal is input to the
fan controller from the engine-ECU.
D
Radiator fan control relay malfunction
D
Fan controller malfunction
D
Radiator fan motor malfunction
D
Engine-ECU malfunction
OK
(1) NG
OK
D
Check the radiator fan control relay. (Refer to GROUP 14
- On-vehicle Service.)
NG
Replace the radiator fan control relay.
Check the following connector: A-09X
NG
Repair
OK
OK
(2) NG
Check the following connectors:
C-136 <R.H. drive vehicles>, A-13
<L.H. drive vehicles>, C-108, B-11X
NG
OK
Check and repair the harness
between the radiator fan control relay
and body earth.
D
Check for disconnection and
damage of the earth cable.
Repair
OK
Check the following connector: A-21
Check and repair the harness
between the radiator fan control relay
and engine control relay.
D
Check for disconnection and
short-circuit of the power cable.
(3) NG
Check and repair the harness
between the battery and radiator fan
control relay.
D
Check for disconnection and
short-circuit of the power cable.
Measure at the A-09X radiator fan
control relay connector.
D
Remove the relay, and measure
at the connector side.
(1) Resistance between terminal No.
3 and earth
OK: 2 Ω or less
(2) Voltage between terminal No. 1
and earth
(Ignition switch: ON)
OK: System voltage
(3) Voltage between terminal No. 4
and earth
OK: System voltage
NG
Repair
OK
Measure at the A-21 fan controller
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 3
and earth
OK: System voltage
To the next page
NG
OK
Check the harness between the
radiator fan control relay and fan
controller.
D
Check for disconnection and
short-circuit of the output cable.
NG
Repair
OK
Check the following connectors:
C-136 <R.H. drive vehicles>, A-13
<L.H. drive vehicles>, C-108, B-11X
NG
Repair
OK
OK
Check the harness between the
radiator fan control relay and engine
control relay.
D
Check for damage of the power
cable.
NG
Repair
Check and repair the harness
between the radiator fan control relay
and body earth.
D
Check for damage of the earth
cable.
MPI -
Troubleshooting
13A-88
NG
Repair
NG
Repair
NG
From the previous page
OK
OK
Replace the engine-ECU.
NG
MUT-II Actuator Test
D
No. 21: Fan controller
D
Ignition switch: ON
OK: Radiator fan motor rotates.
NG
Check the radiator fan motor drive.
D
Disconnect the C-126
engine-ECU connector.
D
Ignition switch: ON
OK: Radiator fan motor rotates
at a high speed.
OK
OK
Check the harness between the
battery and radiator fan control relay.
D
Check for damage of the power
cable.
Repair
Measure at the C-126 engine-ECU
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 21
and earth
OK: 4.9 - 5.1 V
OK
OK
Check the harness between the
radiator fan control relay and fan
controller.
D
Check for damage of the output
cable.
Replace the radiator fan motor and
fan controller assembly.
NG
NG
OK
Check the following connector:
C-136 <R.H. drive vehicles>,
A-13 <L.H. drive vehicles>
OK
Replace the radiator fan motor and
fan controller assembly.
Check the harness between the fan
controller and engine-ECU.
D
Check for short-circuit of the
output cable.
Repair
NG
OK
Check the following connector: C-126
Repair
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-89
Inspection Procedure 25
Condenser fan relay system
Probable cause
The condenser fan relay turns ON with the signal from the engine-ECU, and
power is supplied to the condenser fan motor.
D
Condenser fan relay (HI) malfunction
D
Condenser fan relay (LOW) malfunction
D
Condenser fan motor malfunction
D
Condenser fan circuit disconnection, short-circuit,
or connector contact defect
D
Engine-ECU malfunction
OK
Check and repair the harness
between the condenser fan relay
(LOW) and engine-ECU.
D
Check for disconnection and
damage of the power cable.
(2) NG
OK
OK
Check the condenser fan motor.
(Refer to GROUP 14 - Engine
Cooling.)
OK
NG
OK
Check the following connector:
A-06X
OK
MUT-II Actuator Test
D
No. 38: Condenser fan (LOW)
D
Ignition switch: ON
OK: Condenser fan motor ro-
tates (low speed).
NG
OK
Measure at the C-122 engine-ECU
connector.
D
Measure the engine-ECU terminal
voltage.
D
Ignition switch: ON
D
Voltage between terminal No. 34
and earth
(Ignition switch: ON)
OK: System voltage
Repair
NG
To the next page
NG
Replace the condenser fan relay
(LOW).
OK
Check the condenser fan relay
(LOW). (Refer to GROUP 14 -
On-vehicle service.)
(1) NG
Measure at the A-06X condenser fan
relay (LOW) connector.
D
Remove the relay, and measure
at the connector side.
(1) Voltage between terminal No. 2
and earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between terminal No. 4
and earth
OK: System voltage
NG
Repair
OK
OK
Check the following connectors:
C-135, C-102, C-209, C-210
Check and repair the harness
between the condenser fan relay
(LOW) and ignition switch.
D
Check for disconnection and
damage of the power cable.
Check the following connectors:
C-122, C-136 <R.H. drive vehicles>,
A-43 <L.H. drive vehicles>
Check the following connector:
C-201
NG
Check the ignition switch. (Refer to
GROUP 54 - Ignition switch.)
Replace the ignition switch.
Check and replace the harness
between the battery and condenser
fan relay (LOW).
D
Check for disconnection and
damage of the power cable.
MPI -
Troubleshooting
13A-90
(2) NG
OK
OK
OK
NG
OK
Check the following connector:
A-07X
OK
MUT-II Actuator Test
D
No. 37: Condenser fan (HI)
D
Ignition switch: ON
OK: Condenser fan motor ro-
tates (high speed).
NG
Repair
NG
Replace the condenser fan relay
(HI).
OK
Check the condenser fan relay (HI).
(Refer to GROUP 14 - On-vehicle
service.)
(1) NG
Measure at the A-07X condenser fan
relay (HI) connector.
D
Remove the relay, and measure
at the connector side.
(1) Voltage between terminal No. 2
and earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between terminal No. 4
and earth
OK: System voltage
NG
Repair
OK
OK
Check the following connectors:
C-135, C-102, C-209, C-210
Check and repair the harness
between the condenser fan relay
(HI) and ignition switch.
D
Check for disconnection and
damage of the power cable.
Check the following connector:
C-201
NG
Check the ignition switch. (Refer to
GROUP 54 - Ignition switch.)
Replace the ignition switch.
Check and replace the harness
between the battery and condenser
fan relay (HI).
D
Check for disconnection and
damage of the power cable.
NG
Check the following connector: A-45
OK
Replace the engine-ECU.
OK
To the next page
NG
OK
Check the harness between the
condenser fan relay (LOW) and
engine-ECU.
D
Check for damage of the power
cable.
Repair
Repair
NG
OK
Measure at the A-45 condenser fan
motor connector.
D
Disconnect the connector to
measure at the harness side.
D
Disconnect the C-122
engine-ECU connector, and earth
the terminal No. 34.
D
Ignition switch: ON
D
Voltage between terminal No. 2
and earth
OK: System voltage
Check and repair the harness
between the condenser fan relay
(LOW) and engine-ECU.
D
Check for disconnection of the
power cable.
From the previous page
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст