Mitsubishi Montero (2002-2004). Manual — part 247
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-35
STEP 2. Check the battery power supply circuit to the
front-ECU. Test at front-ECU connector A-07X.
(1) Disconnect front-ECU connector A-07X and measure the
voltage available at the relay box side of the connector.
(2) Measure the voltage between terminal 7 and ground.
• The voltage should be approximately 12 volts (battery
positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 5.
NO : Go to Step 3.
STEP 3. Check the front-ECU connector A-07X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is the front-ECU connector A-07X in good condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
front-ECU normally.
STEP 4. Check the wiring harness between front-ECU
connector A-07X (terminal 7) and the battery.
Q: Is the wiring harness between front-ECU connector A-
07X (terminal 7) and the battery in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The system
should communicate with the front-ECU normally.
AC204183
CONNECTOR : A-07X
AB
2 1
3
4
6
7
8
9
5
11 10
RELAY BOX SIDE
1
2
3
4
5
7
9
10
6
8
11
ACX01287AB
CONNECTOR A-07X
(RELAY BOX SIDE)
AC204183
CONNECTOR : A-07X
AB
2 1
3
4
6
7
8
9
5
11 10
RELAY BOX SIDE
AC204183
CONNECTOR : A-07X
AB
2 1
3
4
6
7
8
9
5
11 10
RELAY BOX SIDE
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-36
STEP 5. Check the ground circuit to the front-ECU. Test at
front-ECU connector A-08X.
(1) Disconnect front-ECU connector A-08X and measure the
resistance available at the relay box side of the connector.
(2) Measure the resistance value between terminal 31 and
ground.
• The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 8.
NO : Go to Step 6.
STEP 6. Check the front-ECU connector A-08X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-08X in good condition?
YES : Go to Step 7.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
front-ECU normally.
STEP 7. Check the wiring harness between front-ECU
connector A-08X (terminal 31) and the ground.
Q: Is the wiring harness between front-ECU connector A-
08X (terminal 31) and ground in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The system
should communicate with the front-ECU normally.
AC204183
CONNECTOR : A-08X
AC
22
23
21
26 25
27
28
31 30 29
24
RELAY BOX SIDE
A-08X
21
22
23
24
25
27 26
28
29
30
31
ACX01288
CONNECTOR A-08X
(RELAY BOX SIDE)
AB
AC204183
CONNECTOR : A-08X
AC
22
23
21
26 25
27
28
31 30 29
24
RELAY BOX SIDE
A-08X
AC204183
CONNECTOR : A-08X
AC
22
23
21
26 25
27
28
31 30 29
24
RELAY BOX SIDE
A-08X
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-37
STEP 8. Check the front-ECU connector A-08X and ETACS-
ECU connector D-224 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are front-ECU connector A-08X and ETACS-ECU
connector D-224 in good condition?
YES : Go to Step 9.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
front-ECU normally.
AC204183
CONNECTOR : A-08X
AC
22
23
21
26 25
27
28
31 30 29
24
RELAY BOX SIDE
A-08X
AC204174
CONNECTOR : D-224
AD
D-224(B)
D-224(B)
HARNESS SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-38
STEP 9. Check the wiring harness between front-ECU
connector A-08X (terminal 22) and ETACS-ECU connector
D-224 (terminal 21).
NOTE: Also check intermediate connector D-28 and joint con-
nector D-02 for loose, corroded, or damaged terminals, or ter-
minals pushed back in the connector. If intermediate connector
D-28 or joint connector D-02 is damaged, repair or replace the
damaged component(s) as described in GROUP 00E, Harness
Connector Inspection
.
Q: Is the wiring harness between front-ECU connector A-
08X (terminal 22) and ETACS-ECU connector D-224
(terminal 21) in good condition?
YES : Go to Step 10.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The system
should communicate with the front-ECU normally.
AC204183
CONNECTOR : A-08X
AC
22
23
21
26 25
27
28
31 30 29
24
RELAY BOX SIDE
A-08X
AC204174
CONNECTOR : D-224
AD
D-224(B)
D-224(B)
HARNESS SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
AC204188
CONNECTORS: D-02, D-28
D-02
D-02
D-28
AB
D-28
9 10
8
6 7
31 32
30
29
18 19 20 21
5
4
2
1
3
27
26
24
23
25
12 13 14 15 16 17
28
11
22
33
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
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