Mitsubishi Montero Sport (2004+). Manual — part 108

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-27

STEP 8. Check the harness wire between stoplight switch
connector C-66 (terminal No.1) and auto-cruise control
vacuum pump connector A-02 (Terminal No.1).
Q: Is any harness wire between stoplight switch connector

C-66 and auto-cruise control vacuum pump connector
A-02 damaged?
YES : Repair or replace the harness wire. Then go to Step

19 .

NO : It can be assumed that this malfunction is intermittent.

(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-7

).

AC202157

1
3

4

2

CONNECTOR: C-66

AB

C-66 (B)

C-66:HARNESS SIDE
CONNECTOR

AC202156

3

1 2

4

CONNECTOR:A-02

HYDRAULIC
UNIT

AB

A-02:HARNESS SIDE
CONNECTOR

A-02 (B)

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-28

STEP 9. 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 and the

auto-cruise control main switch to the "ON" position.

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

connector C-35 terminal 7 and ground by backprobing.

• Voltage should measure battery positive voltage. [When

decelerating with the "SET" switch while driving at con-
stant speed (Release valve open).]

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

connector C-35 terminal 8 and ground by backprobing.

• Voltage should measure battery positive voltage. [When

decelerating with the "SET" switch while driving at con-
stant speed. (Control valve open).]

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

connector C-35 terminal 16 and ground by backprobing.

• Voltage should measure battery positive voltage. (When

the motor is stopped during a constant road speed.)

(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are all of the above values satisfied?

YES : Go to Step 18
NO : Go to Step 10 .

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

ACX01897

C-35 HARNESS CONNECTOR:
HARNESS SIDE

AJ

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-29

STEP 10. Check auto-cruise control-ECU connector C-35
and intermediate connector C-41 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 19 .

NO : Go to Step 11 .

STEP 11. Check auto-cruise control vacuum pump
connector A-02 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 19 .

NO : Go to Step 12 .

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

AC202075

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

CONNECTOR: C-41

AB

C-41

C-41: MALE SIDE CONNECTOR

AC202156

3

1 2

4

CONNECTOR:A-02

HYDRAULIC
UNIT

AB

A-02:HARNESS SIDE
CONNECTOR

A-02 (B)

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-30

STEP 12. Check the auto-cruise vacuum pump.
(1) Disconnect the vacuum hose from the auto-cruise vacuum

pump and connect a vacuum gauge to the vacuum pump.

(2) Disconnect the vacuum pump connector A-02.

(3) Check the auto-cruise vacuum pump and valves according

to the following procedure:

• Connect the positive battery terminal to auto-cruise vac-

uum pump connector A-02 terminal 1, and the negative
battery terminal to terminals 2, 3, and 4. The vacuum
gauge should read 27 kPa (8.0 in Hg) or more.

• The vacuum should be maintained when auto-cruise

vacuum pump connector A-02 terminal 4 is discon-
nected from the negative battery terminal while termi-
nals 1, 2, and 3 remain connected. Then the vacuum
gauge should read 0 kPa (0 in Hg) when terminal 2 is
disconnected from the negative battery terminal while
terminals 1, and 3 remain connected.

• The vacuum should be maintained when auto-cruise

vacuum pump connector A-02 terminal 4 is discon-
nected from the negative battery terminal while termi-
nals 1, 2, and 3 remain connected. Then the vacuum
gauge should read 0 kPa (0 in Hg) when terminal 3 is
disconnected from the negative battery terminal while
terminals 1, and 2 remain connected.

Q: Are all of the above values satisfied?

YES : Go to Step 13 .
NO : Replace the auto-cruise vacuum pump. (Refer to

P.17-99

). Then go to Step 19 .

AC202156

3

1 2

4

CONNECTOR:A-02

HYDRAULIC
UNIT

AB

A-02:HARNESS SIDE
CONNECTOR

A-02 (B)

AC004749 AD

VACUUM GAUGE

A-02
HARNESS CONNECTOR:
AUTO-CRUISE VACUUM
PUMP SIDE