Mitsubishi Montero Sport (2004+). Manual — part 117

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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.

CIRCUIT OPERATION
This is the stoplight switch input signal circuit.
The signal is sent to the stoplight switch from fuse 9,
and is then sent to the auto-cruise control-ECU.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a malfunction of the stoplight
switch circuit.

.

TROUBLESHOOTING HINTS

• Malfunction of the stoplight switch.

• Damaged harness or connector.

• Malfunction of the auto-cruise control-ECU.

AC004767

CONNECTOR: C-10

AC

C-10

AC004747 AC

CONNECTOR: C-35

C-35 (B)

AC004751 AJ

CONNECTOR: C-66

C-66 (B)

AC004769 AC

JUNCTION BLOCK
(FRONT)

CONNECTOR: D-02

D-02 (GR)

AC004768

JUNCTION BLOCK
(REAR)

CONNECTOR: D-09

AC

D-09

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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DIAGNOSIS

Required Special Tool:

• MB991223: Harness set

STEP 1. Check if the stoplight illuminates.
Q: Is the stoplight illuminated?

YES : Go to Step 8 .
NO : Go to Step 2 .

STEP 2. Measure the output circuit voltage at stoplight
switch connector C-66 by backprobing.
(1) Do not disconnect stoplight switch connector C-66.
(2) Turn the ignition switch to the "ON" position and the

auto-cruise control main switch to the "ON" position.

(3) Measure the voltage between stoplight switch connector

C-66 terminal 2 and ground by backprobing.

(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 3 .

STEP 3. Check stoplight switch connector C-66 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is the connector damaged?

YES : Repair or replace the damaged connector. (Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

). Then go to Step 12 .

NO : Go to Step 4 .

AC202157

1
3

4

2

CONNECTOR: C-66

AB

C-66 (B)

C-66:HARNESS SIDE
CONNECTOR

1 2
3 4

AC203957AB

C-66
HARNESS CONNECTOR:
HARNESS SIDE

AC202157

1
3

4

2

CONNECTOR: C-66

AB

C-66 (B)

C-66:HARNESS SIDE
CONNECTOR

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 4. Check junction connector D-02 and D-09 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is any connectors damaged?

YES : Repair or replace the damaged connector. (Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

). Then go to Step 12 .

NO : Go to Step 5 .

STEP 5. Check the harness wire between fusible link No.8
and stoplight switch connector C-66 (terminal No.2).
Q: Is any harness wire between fusible link No.8 and

stoplight switch connector C-66 (terminal No.2)
damaged?
YES : Repair or replace the harness wire. Then go to Step

12 .

NO : Go to Step 6 .

AC203157

1

CONNECTOR: D-02

AB

D-02: HARNESS SIDE
CONNECTOR

JUNCTION BLOCK (FRONT)

D-02 (GR)

AC203156

1

4

M

3

8 7 6

2

5

D-09: HARNESS SIDE
CONNECTOR

CONNECTOR: D-09

D-09

JUNCTION BLOCK
(REAR)

AB

AC202157

1
3

4

2

CONNECTOR: C-66

AB

C-66 (B)

C-66:HARNESS SIDE
CONNECTOR

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 6. Check the stoplight switch.
(1) Remove the stoplight switch. (Refer to GROUP 35A, Brake

Pedal

P.35A-27

).

(2) Connect an ohmmeter to the stoplight switch, and check

continuity when the plunger of the stoplight switch is
pushed in and when it is released.

(3) The stoplight switch is in good condition if the circuit is open

when the plunger is pushed in to a depth of within 3.5 mm
(0.1 inch) from the outer case edge surface, and if the
resistance value is less than 2 ohm when it is released.

(4) The check for continuity should be made at terminals 2 and

3 of the stoplight switch.

Q: Is the circuit open?

YES : Replace the stoplight switch. (Refer to GROUP 35A,

Brake Pedal

P.35A-27

). Then go to Step 12 .

NO : Go to Step 7 .

1 2
3 4

AC103616

C-66 HARNESS
CONNECTOR:
STOPLIGHT
SWITCH SIDE

CONTINUITY

NO
CONTINUITY

3.5 mm (0.1 in)

AC