Mitsubishi Montero (2002-2004). Manual — part 245
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-27
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
STEP 1. Check the battery power supply circuit to the
ETACS-ECU. Test at ETACS-ECU connector D-222.
(1) Disconnect ETACS-ECU connector D-222 and measure the
voltage available at the junction block side of the connector.
(2) Measure the voltage between terminal 6 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 4.
NO : Go to Step 2.
STEP 2. Check ETACS-ECU connector D-222 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector D-222 in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
ETACS-ECU normally.
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
ACX01610
19
20
1817 1615 141312 1110 9 8 7
6 5 4 3 2 1
AB
CONNECTOR D-222
(JUNCTION BLOCK SIDE)
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-28
STEP 3. Check the wiring harness between ETACS-ECU
connector D-222 (terminal 6) and the battery.
NOTE: Also check intermediate connector D-28 and junction
block connector D-221 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector D-28 or junction block connector D-221 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection
Q: Is the wiring harness between ETACS-ECU connector D-
222 (terminal 6) 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 ETACS-ECU normally.
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
AC204170
CONNECTOR : D-28
AI
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
AC204173
CONNECTOR : D-221
AJ
HARNESS SIDE
3
1
4
6 5
7
8
2
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-29
STEP 4. Check the ground circuit to the ETACS-ECU. Test
at ETACS-ECU connector D-222.
(1) Disconnect ETACS-ECU connector D-222 and measure the
resistance available at the junction block side of the
connector.
(2) Measure the resistance value between terminal 20 and
ground.
• The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 7.
NO : Go to Step 5.
STEP 5. Check ETACS-ECU connectors D-222 and D-224
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are ETACS-ECU connectors D-222 and D-224 in good
condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
ETACS-ECU normally.
AC204174
CONNECTOR : D-222
AB
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
D-222
ACX01569
19
20
1817 1615 141312 1110 9 8 7
6 5 4 3 2 1
AB
CONNECTOR D-222
(JUNCTION BLOCK SIDE)
AC204192
CONNECTORS : D-222, D-224
D-222
AC
HARNESS SIDE
D-224(B)
D-222
D-224(B)
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK 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-30
STEP 6. Check the wiring harness between ETACS-ECU
connector D-222 (terminal 20) and C-224 (terminal 23) and
the ground.
NOTE: Also check junction block connector D-209 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector D-209 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection
Q: Is the wiring harness between ETACS-ECU connector D-
222 (terminal 20) and D-224 (terminal 23) and the 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 ETACS-ECU normally.
AC204192
CONNECTORS : D-222, D-224
D-222
AC
HARNESS SIDE
D-224(B)
D-222
D-224(B)
1
2
3
5
6
4
9 8
121110
13
15 14
16
17
7
19
20
18
JUNCTION BLOCK SIDE
21
23
24
22
32
3433
31
26
27
28
3029
38
39
40
36
37
25
35
AC204173
CONNECTOR : D-209
AD
HARNESS SIDE
1
2
6
7
9
3
4
11
12
10
5
13
8
D-209
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