Mitsubishi Montero Sport (2004+). Manual - part 110

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-35

.

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

• When all switches are OFF, the ECU detects 3.5 

− 5.0 volts.

• When the "SET" switch is ON, the ECU detects 

0.4 

− 2.3 volts.

• When the "RESUME" switch is ON, the ECU 

detects 2.3 

− 3.5 volts.

• When the "CANCEL" switch is ON, the ECU 

detects 0.4 volts or less.

• When the main switch is ON, the ECU detects 7.0 

volts.

.

DTC SET CONDITIONS
This code is set when the auto-cruise control switch 
"RESUME" switch, "SET" switch or "CANCEL" 
switch stays ON.

.

TROUBLESHOOTING HINTS
The most likely causes for this code to be set are:

• Malfunction of the auto-cruise control switch

• Malfunction of the clock spring

• Damaged harness or connector

• Malfunction of the auto-cruise control-ECU

AC004747 AE

CONNECTOR: C-35

C-35 (B)

AC004758 AE

CONNECTORS: D-19, D-25

D-19 (Y)

D-25

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-36

DIAGNOSIS

Required Special Tool:

• MB991223: Harness set

STEP 1. Measure the 12-Volt supply circuit voltage at 
auto-cruise control switch connector D-19.
(1) Disconnect auto-cruise control switch connector D-19 and 

measure at the harness side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between auto-cruise control switch 

connector D-19 terminal 1 and ground.

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

voltage?
YES : Go to Step 6 .
NO :  Go to Step 2 .

STEP 2. Check auto-cruise control switch connector D-19 
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 15 

NO :  Go to Step 3 .

STEP 3. Check the clock spring.
Refer to GROUP 52B, Air Bag Modules and Clock Spring 

P.52B-84

.

Q: Is the clock spring damaged?

YES : Replace the clock spring. (Refer to GROUP 52B, Air 

Bag Modules and Clock Spring 

P.52B-84

. Then go to 

Step 15 ).

NO :  Go to Step 4 .

AC203151

3 2 1

CONNECTOR: D-19

AB

D-19 (Y)

D-19: 
HARNESS 
SIDE CONNECTOR

AC004760

D-19 HARNESS CONNECTOR: 
COMPONENT SIDE

AC

AC203151

3 2 1

CONNECTOR: D-19

AB

D-19 (Y)

D-19: 
HARNESS 
SIDE CONNECTOR

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-37

STEP 4. Check clock spring connector D-25 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 15 .

NO :  Check the harness wire between multi-purpose fuse 

No.4 and auto-cruise control switch connector D-19 
for open circuit or damage. Then repair if necessary. 
Then check that DTC 15 is not set.

STEP 5. Check the harness wire between multi-purpose 
fuse No.4 and auto-cruise control switch connector D-19 
(terminal No.1).
Q: Is any harness wire between multi-purpose fuse No.4 

and auto-cruise control switch connector D-19 (terminal 
No.1) damaged?
YES : Repair the damaged harness wire. Then go to Step 

15 .

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

).

AC202305

4

3

1 2

CONNECTOR: D-25

AB

D-25

D-25: 
HARNESS 
CONNECTOR

1

2

3

4

AC203151

3 2 1

CONNECTOR: D-19

AB

D-19 (Y)

D-19: 
HARNESS 
SIDE CONNECTOR

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-38

STEP 6. Measure the output circuit voltage at auto-cruise 
control switch connector D-19 by backprobing.
(1) Do not disconnect auto-cruise control switch connector 

D-19.

(2) Turn the ignition switch to the "ON" position.

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

connector D-19 terminal 2 and ground by backprobing.

• Voltage should be battery positive voltage. (MAIN switch 

is at the "ON" position.)

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

backprobing.

• Voltage should measure between 6.8 and 7.2 volts. 

(MAIN switch is at the "ON" position.)

• Voltage should measure between 3.5 and 5.0 volts. (All 

switches are at the "OFF" position.)

• Voltage should measure between 0.4 and 2.3 volts. 

("SET" switch is at the "ON" position)

• Voltage should measure between 2.3 and 3.5 volts. 

("RESUME" switch is at the "ON" position.)

• Voltage should measure 1 volt or less. ("CANCEL" 

switch is at the "ON" position.)

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are all of the measured voltage satisfied?

YES : Go to Step 9 .
NO :  Go to Step 7 .

STEP 7. Check auto-cruise control switch connector D-19 
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 15 .

NO :  Go to Step 8 .

AC203151

3 2 1

CONNECTOR: D-19

AB

D-19 (Y)

D-19: 
HARNESS 
SIDE CONNECTOR

1 2

3

ACX01913 AI

D-19 HARNESS CONNECTOR: 
HARNESS SIDE

AC203151

3 2 1

CONNECTOR: D-19

AB

D-19 (Y)

D-19: 
HARNESS 
SIDE CONNECTOR