Mitsubishi Montero Sport (2004+). Manual - part 115

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-55

.

CIRCUIT OPERATION
Power of the auto-cruise control-ECU is transmitted 
from the ignition switch (IG1) to the auto-cruise con-
trol-ECU through fuse 8 in the junction block.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a malfunction of the 
auto-cruise control-ECU power supply circuit or the 
auto-cruise control-ECU ground circuit.

.

TROUBLESHOOTING HINTS

• Damaged harness or connector

• Malfunction of the auto-cruise control-ECU

AC004747 AC

CONNECTOR: C-35

C-35 (B)

AC004751 AO

CONNECTOR: C-69

C-69 (B)

AC004763

JUNCTION BLOCK
(FRONT)

CONNECTOR: D-06

AC

D-06

AC004764 AC

JUNCTION BLOCK
(REAR)

CONNECTOR: D-08

D-08

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-56

DIAGNOSIS

Required Special Tool:

• MB991223: Harness set

STEP 1. Measure the output circuit voltage at auto-cruise 
control-ECU connector C-35 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-35.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between auto-cruise control-ECU 

connector C-35 terminal 6 and ground by backprobing.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

YES : Go to Step 5 .
NO :  Go to Step 2 .

STEP 2. Check auto-cruise control-ECU connector C-35 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is the connector damaged?

YES : Repair or replace the damaged components. (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 12 .

NO :  Go to Step 3 .

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE 
CONNECTOR

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01902 AH

C-35 HARNESS CONNECTOR:
HARNESS SIDE

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE 
CONNECTOR

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-57

STEP 3. Check junction block connector D-08 and D-06 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is any connector damaged?

YES : Repair or replace the damaged components. (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 12 .

NO :  Go to Step 4 .

STEP 4. Check the harness wire between ignition switch 
and auto-cruise control-ECU connector C-35 (terminal 
No.6) for damage. 
Q: Is any harness wire between ignition switch and 

auto-cruise control-ECU connector C-35 (terminal No.6) 
damaged?
YES : Repair or replace the harness wire. Then go to Step 

12 .

NO :  Go to Step 11 .

AC203154

1
8

3

4

5

7 6

10

15

16

14

12

13

11

9

2

D-06: HARNESS SIDE 
CONNECTOR

CONNECTOR: D-06

D-06

JUNCTION BLOCK
 (FRONT)

AB

AC203155

M

3

1

4

2

CONNECTOR: D-08

D-08

D-08:HARNESS SIDE 
CONNECTOR

AB

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE 
CONNECTOR

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-58

STEP 5. Measure the ground circuit voltage at auto-cruise 
control-ECU connector C-35 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-35.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between auto-cruise control-ECU 

connector C-35 terminal 14 and ground by backprobing.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volts or less?

YES : Go to Step 8 .
NO :  Go to Step 6 .

STEP 6. Check auto-cruise control-ECU connector C-35 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is the connector damaged?

YES : Repair or replace the damaged components. (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 12 .

NO :  Go to Step 7 .

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE 
CONNECTOR

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01903

C-35 HARNESS CONNECTOR:
HARNESS SIDE

AH

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE 
CONNECTOR