Mitsubishi Lancer Evolution IX 2006

TROUBLESHOOTING
ENGINE COOLING
14-14
STEP 6. Check the fan controller at engine-ECU
connector C-121.
AC505254
16
25
10
24
1
9
24
27
13
26
11
3
12
2829
1415
3031
1718
3332
6
20
5
19 21
35
34
8
23
7
22
JAE
AB
Connector: C-121 <LHD>
Harness side
C-121 (GR)
Engine-ECU
AC505255
16
25
10
24
1
9
24
27
13
26
11
3
12
2829
1415
3031
1718
3332
6
20
5
19 21
35
34
8
23
7
22
JAE
AB
Connector: C-121 <RHD>
Harness side
C-121 (GR)
Engine-ECU
(1) Do not disconnect engine-ECU connector C-121.
(2) Pull out terminal No.18.
(3) Turn the ignition switch to the "ON" position.
Q: Does the cooling fan motor operate?
YES : Replace the engine-ECU. Then go to Step
8
.
NO : Go to Step 7.
STEP 7. Check the fan controller at engine-ECU
connector C-121.
AC505254
16
25
10
24
1
9
24
27
13
26
11
3
12
2829
1415
3031
1718
3332
6
20
5
19 21
35
34
8
23
7
22
JAE
AB
Connector: C-121 <LHD>
Harness side
C-121 (GR)
Engine-ECU
AC505255
16
25
10
24
1
9
24
27
13
26
11
3
12
2829
1415
3031
1718
3332
6
20
5
19 21
35
34
8
23
7
22
JAE
AB
Connector: C-121 <RHD>
Harness side
C-121 (GR)
Engine-ECU
(1) Disconnect engine-ECU connector C-121.
(2) Pull out terminal No.18.
(3) Connect terminal No.18 to the body earth.
(4) Turn the ignition switch to the "ON" position.
Q: Does the cooling fan motor stop running?
YES : Replace the engine-ECU. Then go to Step
8
.
NO : Replace the fan controller. Then go to Step
8
.
STEP 8. Check the symptoms.
Q: Does the cooling fan operate correctly?
YES : The procedure is complete.
NO : Return to Step 1.