Mitsubishi Montero Sport (2004+). Manual — part 443

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DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check ETACS-ECU connector D-11 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to step 2.
NO : Repair or replace damaged components. Refer to

GROUP 00E

P.00E-2

, Harness Connector inspection.

Then go to Step 5.

STEP 2. Measure the power supply line voltage at junction
block connector D-11.
(1) Remove the ETACS-ECU and measure at the junction

block side.

(2) Measure the voltage between terminal 1 and ground, and

between terminal 2 and ground.

• The measured value should be approximately 12 volts

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES : Go to Step 4.
NO : Go to Step 3.

AC201084

JUNCTION
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

AC201084

JUNCTION
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

12 1110 9 8 7 6 5 4

3 2 1

AC004315

D-11 HARNESS CONNECTOR:

COMPONENT SIDE

AC

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STEP 3. Check the harness wires between fusible link (8)
and ETACS-ECU connector D-11 (terminal No.1 and 2).

NOTE: After inspecting intermediate connector A-54X, junction
block connector D-01 or D-02 inspect the wire. If intermediate
connector A-54X, junction block connector D-01 or D-02 is
damaged, repair or replace it. Refer to GROUP 00E

P.00E-2

,

Harness Connector Inspection. Then go to Step 5.
Q: Are there any damaged wires between fusible link (8)

and ETACS-ECU connector D-11 (terminal No.1 and 2)?
YES : Repair or replace the harness wire, then go to Step 5.
NO : Replace the ETACS-ECU. Then go to Step 5.

AC201084

JUNCTION
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

AC200774

2

1

CONNECTOR: A-54X

AB

A-54X

AC202001

1

4

3 2

7

8

9

10

11

5

12

1
6

D-01

D-02
(GR)

CONNECTORS: D-01, D-02

JUNCTION

BLOCK (FRONT)

D-01 COMPONENT SIDE

D-02 COMPONENT SIDE

AB

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STEP 4. Check the harness wires between ETACS-ECU
connector D-11 and ground.

NOTE: After inspecting junction block connector D-13 inspect
the wire. If junction block connector D-13 is damaged, repair or
replace it. Refer to GROUP 00E

P.00E-2

, Harness Connector

Inspection. Then go to Step 5.
Q: Is the harness wire between ETACS-ECU connector

D-11 and ground damaged?
YES : Repair or replace the harness wire. Then go to Step

5.

NO : Replace the ETACS-ECU. Then go to Step 5.

STEP 5. Retest the system.
Q: Does the door lock function operate normally?

YES : The procedure is complete.
NO : Return to Step 1.

AC201084

JUNCTION
BLOCK (REAR)

D-11

COMPONENT SIDE

AB

CONNECTOR: D-11

AC200758

1

10

2

11

3

12

4

13

14

15

5

16

6

17

7

18

8

19

9

20

CONNECTOR: D-13

AC

COMPONENT SIDE

JUNCTION BLOCK
(REAR SIDE)

D-13

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INSPECTION PROCEDURE 3: The other Door(s) do(es) not Lock or Unlock by the Door Switch or the
Front Passenger's Side Door Lock Key Cylinder. (However, they can be Operated by the Driver's
Inside Door Lock Knob.)

Door Lock Switch Circuit

<Vehicles without keyless entry system>

AC309341