Mitsubishi Grandis. Manual — part 247
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-450
<RH drive vehicles> Prior to the wiring harness
inspection, check intermediate connector C-14 <door
switch (front: RH)>, C-16 <door switch (front: RH)
and door switch (front: LH)>, C-27 <door switch
(front: LH)>, D-03 <door switch (rear: RH)>, D-16
<door switch (rear: LH)>, junction block connector
C-210, and repair if necessary.
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 :
Repair the wiring harness.
AC310632 AR
Connectors: C-14, C-16
C-14
C-16
C-14
C-16
9
21
33
35
24
12
3 4
7
8
5 6
39
28
41
30
18
4243
31
1920
32
40
29
1617
38
27
15
37
36
26
14
13
25
2
1
34
23
11
10
22
<RHD>
AC310628AN
Connector: C-27 <RHD>
AC310618
Connector: C-210 <RHD>
AQ
Harness side
Junction block (Front view)
AC310205
AC
D-03 (B)
9
3
2
1
5 6 7 8
4
10
Connector: D-03 <RHD>
AC310207
AC310207
AF
9
3
2
1
5 6 7 8
4
10
Connector: D-16 <RHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-451
Inspection Procedure P-6: Interior lamp automatic shutoff function does not work normally. <Vehicles
with keyless entry system>
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates the interior lamp
automatic-shutdown function in accordance with the
input signals below.
• Ignition switch (ACC)
• Ignition switch (IG1)
• Driver's door switch
• Tailgate switch
• All of the door switches
• Interior lamp loaded signal
If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be
defective. Note that this function can be
disabled/enabled by the adjustment function (default
setting; enabled).
POSSIBLE CAUSES
• Malfunction of the door switches
• Malfunction of the tailgate switch
• Malfunction of the interior lamp
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the SWS monitor customized
function.
Check that the interior lamp automatic-shutdown
function has been enabled by using the SWS monitor
customize function.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Enable the interior lamp
automatic-shutdown function by using the
SWS monitor customize function (Refer to
).
INPUT SIGNAL
KEY CYLINDER
ILLUMINATION
LAMP
· ROOM LAMP
· DOOR LAMP AND
LUGGAGE
COMPARTMENT
LAMP
· REAR PERSONAL
LAMP
KEEP RELAY
LOAD
DETERMINATION
CIRCUIT
J/B SIDE
· ALL DOOR
SWITCH
· FRONT DOOR
SWITCH
· IGNITION
SWITCH (ACC)
· IGNITION
SWITCH (IG1)
· INTERIOR LAMP
LOADED SIGNAL
ETACS-ECU
FUSIBLE
LINK
26
Interior Lamp Automatic Shut-off Function Circuit
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-452
Step 2. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.
• Ignition switch: OFF
ECU TO BE CHECKED
• ETACS
OK: "OK" is displayed on the "ETACS ECU"
menu.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to Inspection Procedure A-3
"Communication with ETACS-ECU is
impossible
."
Step 3. SWS monitor data list.
Check the input signals below, which are related to
the interior lamp automatic-shutdown function.
<Selected item> ETACS ECU
• Ignition switch: OFF
• Driver's door: open
OK: Normal condition is displayed.
Q: Is the check result normal?
Normal conditions are displayed for all the items. :
Go to Step 4.
Normal condition is not displayed for item No.30. :
Refer to inspection procedure Q-2 "The
ignition switch (IG1) signal is not received
Normal condition is not displayed for item No.31. :
Refer to inspection procedure Q-1 "The
ignition switch (ACC) signal is not received
Normal condition is not displayed for item No.32. :
Refer to inspection procedure Q-5 "The
driver's door switch signal is not received
<RH drive vehicles."
Step 4. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal related to the interior
lamp automatic shut-down function.
• Passenger’s door: Close → Open
• Tailgate: Close → Open
• Rear door (RH): Close → Open
• Rear door (LH): Close → Open
OK: Normal conditions displayed for all the
items.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to inspection procedure Q-14 "All the
door switch signals are not received
."
Step 5. Pulse check
Check the input signals below, which are related to
the interior lamp automatic-shutdown function.
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Refer to inspection procedure Q-24 "Interior
lamp loaded signal is not detected
."
Item No.
Item name
Normal
condition
Item 30
IG SW(IG1)
OFF
Item 31
IG SW(ACC)
OFF
Item 32
DR DOOR SW
ON
Item No.
Item name
Normal
condition
Item 05
PASS DOOR SW
from OFF
to ON
Item No.
Item name
Normal
condition
Item 07
TRK LID LA SW
from OFF
to ON
Item No.
Item name
Normal
condition
Item 41
R.DOOR(RH) SW
from OFF
to ON
Item No.
Item name
Normal
condition
Item 42
R.DOOR(LH) SW
from OFF
to ON
System switch
Check condition
Interior lamp loaded
signal
When a load is applied
through multi-purpose
fuse No.18
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-453
Step 6. Retest the system.
Check that the interior lamp automatic-shutdown
function 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.
Inspection Procedure P-7: The door-ajar warning lamp does not illuminate/extinguish normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the door-ajar warning lamp does not work normally,
the input signal circuit or the ETACS-ECU may be
defective.
POSSIBLE CAUSES
• The combination meter may be defective
• The CAN bus line is defective.
• The ETACS-ECU may be defective
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the door lamp.
When the door is opened or closed, check that the
door lamp illuminate/go off normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure P-5 "The
door lamp does not illuminate normally
."
Step 2. MUT-III CAN bus diagnostics.
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the CAN bus line (Refer to GROUP
54D, Diagnosis
Step 3. Check for combination meter diagnosis
code.
Check whether the combination meter-related
diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
).
NO :
Go to Step 4.
ETACS-
ECU
SPEED SIGNAL
COMBINATION
METER
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
INPUT SIGNAL
INPUT SIGNAL
· IGNITION SWITCH (IG1)
· ALL DOOR SWITCH
· TAILGATE SWITCH
Door-Ajar Warning Lamp Function
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