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

AUTO-CRUISE CONTROL

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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

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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

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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

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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