Mitsubishi Grandis. Manual — part 241
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-426
Inspection Procedure P-4: The luggage compartment lamp does not illuminate 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
If the luggage compartment lamp does not illuminate
or extinguish normally, wiring harness connector(s)
or the bulb may be defective.
POSSIBLE CAUSES
• Malfunction of the luggage compartment lamp
bulbs
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. SWS monitor data list
<Selected item> ETACS ECU
• Driver's door is open
OK: Normal condition is displayed.
Q: Is the check result normal?
Luggage Room Lamp Circuit
ETACS-ECU
LUGGAGE COMPARTMENT
LAMP
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
J/B SIDE
Item No.
Item name
Normal
condition
Item 32
DR DOOR SW
ON
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-427
YES :
Go to Step 2.
NO :
Refer to inspection procedure Q-5 "The
driver's door switch signal is not received
<LH drive vehicles>
vehicles>
Step 2. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal related to the rear
personal lamp illumination.
• Ignition switch: OFF (key inserted)
• Passenger’s door: Close → Open
• Tailgate: Close → Open
• Rear door (RH): Close → Open
• Rear door (LH): Close → Open
• Driver’s door: Unlock → Lock
• Room lamp on switch: ON
• Room lamp off switch: ON
OK: Normal conditions displayed for all the
items.
Q: Is the check result normal?
Item No.
Item name
Normal
condition
Item 03
KEY REMINSW
OFF
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
Item No.
Item name
Normal
condition
Item 21
DR DOR LOK SW
from OFF
to ON
Item 22
DR DOR ULOK SW
from ON
to OFF
Item No.
Item name
Normal
condition
Item 31
RM LMP ON SW
ON
Item No.
Item name
Normal
condition
Item 31
RM LMP OFF SW
ON
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-428
Normal conditions are displayed for all the items. :
Go to Step 3.
Normal condition is not displayed for item No.03 :
Refer to inspection procedure Q-11 "The
key reminder switch signal is not received
Normal condition is not displayed for item No.05,
07,41or 42 :
Refer to inspection procedure Q-14
"All the door switch signals are not received
Normal condition is not displayed for item No.21
and 32 :
Refer to inspection procedure Q-15 "The
driver's door lock actuator switch signal is
not received <LH drive vehicles>
Normal condition is not displayed for item No.31or
42 :
Refer to inspection procedure Q-22 "The
interior lamp "all on" or "all off" switch signal
is not sent to the ETACS-ECU
Step 3. Connector check: G-12 luggage
compartment lamp connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Check the bulbs of the luggage
compartment lamp.
Check that the luggage compartment lamp bulbs are
not burned out.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the luggage compartment lamp
bulb.
Step 5. Connector check: C-221 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
AC310222
Connector: G-12
AI
G-12
Harness side
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-429
Step 6. Check the wiring harness from C-221
ETACS-ECU connector terminal No.52 to G-12
luggage compartment lamp connector terminal
No.2.
NOTE:
Prior to the wiring harness inspection, check
intermediate connector C-16, G-14, and repair if
necessary.
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310222
Connector: G-12
AI
G-12
Harness side
AC310615
AE
Connector: C-16 <LHD>
AC310631 AD
Connector: C-16 <RHD>
AC310222
AC310222
Connector: G-14
AK
2
1
4
3
13
8
11
10
5
7
12
6
14
9
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