Mitsubishi Grandis. Manual — part 61
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-241
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS-ECU.
INSPECTION PROCEDURE H-4: The rear washer does not work.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the rear washer does not work normally, the input
signal circuits to the washer switch, rear washer
motor or the ETACS-ECU may be defective.
IGNITION
SWITCH (ACC)
ETACS-ECU
J/B SIDE
INPUT SIGNAL
REAR WASH. SW
WASHER
MOTOR
FRONT-ECU
REAR WASHER
RELAY
WINDSHIELD
WASHER RELAY
Rear Washer Drive Circuit
Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-242
POSSIBLE CAUSES
• Malfunction of the washer motor
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Malfunction of the front-ECU
• Damaged harness wires and connectors
Step 1. Confirm the operation of the rear wiper.
Check that the rear wiper work normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure H-1 "The rear
wiper does not work at all
Step 2. Pulse check
Check the input signals below which are related to
the rear washer.
• Ignition switch: ACC
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Are the check result normal?
YES :
Go to Step 3.
NO :
Refer to inspection procedure Q-7 "The
column switch (windshield wiper washer
and rear wiper washer switch) signal is not
received
."
Step 3. Connector check: A-34 washer motor
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the connector.
Step 4. Check the washer motor.
Refer to GROUP 51
− Rear wiper and washer
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the washer motor.
System switch
Check condition
Column switch (rear
washer switch)
When the switch is
turned from off to on
AC310401
Connector: A-34 <LHD>
Harness side
A-34 (GR)
AF
AC310396
Connector: A-34 <RHD>
Harness side
A-34 (GR)
AF
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-243
Step 5. Check the wiring harness between A-34
washer motor connector terminal No.1 and A-15X
front-ECU connector No.21.
• Check the earth line for open or short circuit.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the wiring harness.
Step 6. Connector check: C-220 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
AC311521AC
Connector: A-15X
Relay box side
21
22
23
24
25
26
27
28
29
30
31
AC310401
Connector: A-34 <LHD>
Harness side
A-34 (GR)
AF
AC310396
Connector: A-34 <RHD>
Harness side
A-34 (GR)
AF
AC310626
Connector: C-220 <LHD>
Junction block (Rear view)
AE
Harness side
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
AC310620
Connector: C-220 <RHD>
Junction block (Rear view)
AD
Harness side
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-244
Step 7. Check the wiring harness between C-220
ETACS-ECU connector terminal No.23 and A-34
washer motor connector terminal No.2.
NOTE:
Prior to the wiring harness inspection, check
intermediate connector C-125 and repair if
necessary.
• Check the output signal line.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
Step 8. Retest the system.
Check that the rear washer works normally.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS-ECU.
AC310401
Connector: A-34 <LHD>
Harness side
A-34 (GR)
AF
AC310396
Connector: A-34 <RHD>
Harness side
A-34 (GR)
AF
AC310626
Connector: C-220 <LHD>
Junction block (Rear view)
AE
Harness side
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
AC310620
Connector: C-220 <RHD>
Junction block (Rear view)
AD
Harness side
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
AC310613
AD
Connector: C-125 <LHD>
AC310628AB
Connector: C-125 <RHD>
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