Mitsubishi Montero (2004+). Manual - part 402

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-15

DIAGNOSTIC TROUBLE CODE CHART

M1172002200325

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.17-15

21

Cancel latch signal system

P.17-26

22

Stoplight switch system

P.17-27

23

Powertrain control module (PCM) and its related 
components

P.17-37

AC204903AB

Auto-cruise Control Switch System Circuit

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-16

.

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

17-17

DIAGNOSIS

.

Required Special Tools:

• MB991958: Scan tool (MUT-III sub assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB cable

• MB991911: MUT-III main harness B

• MB991223: Harness set

STEP 1. Using scan tool MB991958, check data list item 02: 
Set Switch, item 03: Resume Switch.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958. 
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode.

Item 02 auto-cruise control system, Set Switch.

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

on scan tool MB991958 should be "ON."

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

play on scan tool MB991958 should be "OFF."

(4) Set scan tool MB991958 to data reading mode.

Item 03 auto-cruise control system, Resume Switch.

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

display on scan tool MB991958 should be "ON."

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

display on scan tool MB991958 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

.

AC306409AF

MB991911

MB991824

MB991827

AC205038AB

D-227

CONNECTOR: D-227

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-18

STEP 3. Check the auto-cruise control switch.
(1) Disconnect auto-cruise control switch 

P.17-58

.

(2) Measure the resistance between terminal 2 and terminal 3 

when each of the "SET", "RESUME", "CANCEL" and MAIN 
switch is pressed.

Q: Is the resistance within specifications?

YES : Go to Step 4.
NO :  Replace the auto-cruise control switch. Refer to 

P.17-58

, Auto-cruise Control.

STEP 4. Measure the auto-cruise control switch power 
supply voltage at connector D-227 by backprobing.
(1) Do not disconnect connector D-227.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 2 and ground by 

backprobing.

• When "SET" switch is at the ON position, voltage should 

measure between 2.1 and 2.7 volts.

• When "RESUME" switch is at the ON position, voltage 

should measure between 3.3 and 4.0 volts.

Q: Is the measured voltage within specifications?

YES : Go to Step 5.
NO :   Go to step 6.

SWITCH POSITION

SPECIFIED CONDITION

MAIN switch "OFF"

Open circuit

MAIN switch "ON"

Less than 2 ohms

"CANCEL" switch ON

Approximately 100 

Ω

"RESUME" switch ON

Approximately 887 

Ω

"SET" switch ON

Approximately 300 

Ω

1 2 3

AC203822AB

OFF

OFF

OFF

OFF

ON

ON

ON

ON

CAN

MAIN

RES

SET

2

3

AC205038AB

D-227

CONNECTOR: D-227

1 2 3

AC205053AB

D-227 HARNESS 
CONNECTOR:
HARNESS SIDE