Mitsubishi Montero (2002-2004). Manual - part 837

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-11

Without using scan tool MB991502
1. Turn the ignition switch to the "ON" position while holding 

the auto-cruise control switch in the "SET" (down) position.

2. Check to make sure the "CRUISE" light on the instrument 

panel is flashing.

3. Put the auto-cruise control switch in the "SET" (down) 

position. Depress the brake pedal and hold for five seconds 
or more. Release the brake pedal, auto-cruise control 
switch, then turn the ignition switch to the "LOCK" (OFF) 
position. The DTC(s) are now erased.

INSPECTION USING SCAN TOOL MB991502, 
DATA LIST

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Carry out inspection by means of the data list. If there is an 

abnormality, check and repair the chassis harnesses and 
components. (Refer to 

P.17-46

, Data List Reference Table.)

4. Re-check using scan tool MB991502 and check to be sure 

that the abnormal input and output have returned to normal 
because of the repairs.

5. Erase the diagnostic trouble code(s).
6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Disconnect scan tool MB991502 from the data link 

connector.

8. Start the engine again and do a test drive to confirm that the 

problem is eliminated.

ACX02250

AUTO-CRUISE 
CONTROL SWITCH

RESUME SWITCH: 
ON

SET SWITCH: 
ON

BRAKE PEDAL

ON POSITION

STOPLIGHT SWITCH

AB

ACX02258 AB

MB991502

16PIN

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-12

DIAGNOSTIC TROUBLE CODE CHART

M1172002200240

Check according to the inspection chart that is 
appropriate for the diagnostic trouble code.

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC15 : Auto-cruise Control Switch System

DIAGNOSTIC TROUBLE 
CODE NO.

INSPECTION ITEM

REFERENCE PAGE

15

Auto-cruise control switch system

P.17-12

21

Cancel latch signal system

P.17-23

22

Stoplight switch system

P.17-24

23

Powertrain control module (PCM) and its related 
components

P.17-34

AC204903AB

Auto-cruise Control Switch System Circuit

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-13

.

CIRCUIT OPERATION
This circuit judges the signals of each switch ("SET," 
"RESUME" and "CANCEL") of the auto-cruise con-
trol switch. The PCM detects the state of the auto-
cruise control switch by sensing the voltages shown 
below.

• When all switches are OFF: 4.7 − 5.3 volts

• When the "MAIN" switch is ON: 0 − 0.3 volt 

• When the "SET" switch is ON: 2.1 − 2.7 volts 

• When the "RESUME" switch is ON: 3.3 − 4.0 

volts 

• When the "CANCEL" switch is ON: 0.8 − 1.5 volts 

.

DTC SET CONDITIONS

Check Condition

• The auto-cruise control indicator light illuminates.

Judgement Criteria

• The "SET" or "RESUME" switch remains on for 

60 seconds.

.

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

• Malfunction of the auto-cruise control switch.

• Malfunction of the clock spring.

• Damaged harness or connector.

• Malfunction of the PCM.

AC205036

CONNECTORS: D-135, D-136

D-135(GR)

PCM

AB

D-136(GR)

D-135

D-136

1 2 3

5

4

6

AC205037

2

1

3

CONNECTORS: D-205, D-226, D-227, D-230

D-227

D-226

D-205(B)

D-227

D-226

D-205

D-230(B)

D-230

AB

AC205045

6

1

7

2

9

8

10

3

5

12

11

4

1314

E-110

CONNECTOR: E-110

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-14

DIAGNOSIS

.

Required Special Tools:

• MB991223: Harness Set

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 02: 
Set Switch, item 03: Resume Switch.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. 
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to data reading mode for auto-

cruise control system item 02, Set Switch.

• When "SET" switch is at the ON position, the display on 

scan tool MB991502 should be "ON."

• When "SET" switch is at the OFF position, the display 

on scan tool MB991502 should be "OFF."

(4) Set scan tool MB991502 to data reading mode for auto-

cruise control system item 03, Resume Switch.

• When "RESUME" switch is at the ON position, the dis-

play on scan tool MB991502 should be "ON."

• When "RESUME" switch is at the OFF position, the dis-

play on scan tool MB991502 should be "OFF."

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : 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.00-6

.

NO :  Go to Step 2.

STEP 2. Check auto-cruise control switch connector D-227 
for looser, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 3.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

ACX02258AC

MB991502

16-PIN

AC205038AB

D-227

CONNECTOR: D-227