Mitsubishi Montero (2002-2004). Manual - part 840

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-23

STEP 11. Check the harness for damage between auto-
cruise control switch connector D-227 terminal 3 and PCM 
connector D-136 terminal 146.
Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO :  Repair or replace the harness wire.

DTC 21: Cancel Latch Signal System

.

DTC SET CONDITIONS
The PCM communicates cancellation retention infor-
mation between the two microprocessors. This DTC 
is set when cancellation retention information con-
tains inconsistency.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are:)
Malfunction of the PCM.

DIAGNOSIS

.

Replace the PCM. (Refer to 

P.17-54

.) Check that diagnostic 

trouble code 21 is not set.

AC205038AB

D-227

CONNECTOR: D-227

AC205040

CONNECTOR: D-136

PCM

AB

D-136(GR)

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-24

DTC 22: Stoplight Switch System

AC204904AB

Stoplight Switch System Circuit

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-25

AC205041

CONNECTORS: D-28, D-29

D-28

D-29

AB

D-28

D-29

AC205042

CONNECTOR: D-116

D-116

AB

1

2

3

4

AC204682AB

CONNECTOR: D-123

D-123 

AC205043

CONNECTOR: D-125

D-125 

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-26

.

CIRCUIT OPERATION

• Battery positive voltage is supplied to the stop-

light switch (terminal 2 and 3).

• When the brake pedal is depressed, battery posi-

tive voltage is applied to the PCM (terminal 39 
and 54).

.

DTC SET CONDITIONS

Check Condition

• The auto-cruise control indicator light illuminates.

Judgement Criteria

• Short in stop light switch circuit

• Open circuit in the brake switch circuit (between 

PCM terminal 54 and ground)

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case:)

• Malfunction of the stoplight switch.

• Damaged harness or connector.

• Malfunction of the PCM.

DIAGNOSIS

.

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Check the brake pedal height.
Refer to GROUP 35A, On-vehicle Service 

− Brake Pedal 

Check and Adjustment 

P.35A-115

.

Q: Is the height adjusted properly?

YES : Go to Step 2.
NO :  Adjust the brake pedal to the proper height.

AC205046

CONNECTOR: D-133

D-133(GR)

PCM

AB

AC205044

6

1

7

2

9

8

10

3

5

12

11

4

1314

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

3435

1112

27

26

3637

14

4

15

CONNECTORS: E-110, E-111

E-111

E-110

E-111

E-110

AB