Mitsubishi Montero (2002-2004). Manual — part 244
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-23
STEP 11. Check column switch connector D-203 and
ETACS-ECU connector D-224 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are column switch connector D-203 and ETACS-ECU
connector D-224 in good condition?
YES : Go to Step 12.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. The system should communicate with the
column switch (column-ECU) normally.
STEP 12. Check the wiring harness between column
switch connector D-203 (terminal 2) and ETACS-ECU
connector D-224 (terminal 31).
Q: Is the wiring harness between column switch connector
D-203 (terminal 2) and ETACS-ECU connector D-224
(terminal 31) in good condition?
YES : Go to Step 13.
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 column switch (column-
ECU) normally.
AC204172
CONNECTOR : D-203
AC
HARNESS SIDE
1
2
3
7
8
6
5
10
4
9
D-203
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
AC204172
CONNECTOR : D-203
AC
HARNESS SIDE
1
2
3
7
8
6
5
10
4
9
D-203
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-24
STEP 13. Replace the ECU.
(1) Replace the column switch.
(2) The system should communicate with the column switch
(column-ECU) normally.
Q: Can the system communicate with the column switch
(column-ECU)?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. The system should
communicate with the column switch (column-ECU)
normally.
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-25
INSPECTION PROCEDURE A-3: Communication with the ETACS-ECU is not possible.
ETACS-ECU Power Supply and SWS Communication Circuit
SYMPTOM PROCEDURES
TSB Revision
SWS SYMPTOM PROCEDURES
54Bb-26
.
CIRCUIT OPERATION
• The power supply to the ETACS-ECU is provided
by the battery and the ignition switch (IG1).
• If the power supply system from the battery is
defective, the system operates by the power sup-
ply from the ignition switch (IG1).
.
TECHNICAL DESCRIPTION (COMMENT)
It is suspected that the power supply circuit to the
ETACS-ECU is defective, or the wiring harness
between the SWS monitor kit and the ETACS-ECU
or their connector(s) is damaged. If the battery power
supply circuit to the ECU (terminal 6 of the ETACS-
ECU) is damaged, also check the power supply cir-
cuit from the ignition switch (IG1) (terminal 16 of the
ETACS-ECU), and repair if necessary. If the ground
circuit to the ECU (terminal 20 of the ETACS-ECU) is
damaged, also check the ground circuit to the sensor
(terminal 23 of the ETACS-ECU), and repair if neces-
sary.
.
TROUBLESHOOTING HINTS
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
AC204170
CONNECTOR : D-28
BB
AC204172
CONNECTOR : D-203
AG
AC204173
CONNECTORS : D-209, 221
AL
D-209
D-221
AC204174
CONNECTORS : D-222, D-224
D-224(B)
AH
D-222
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