Mitsubishi Grandis. Manual — part 162
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-110
DIAGNOSIS PROCEDURE
Step 1. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal, which is related to
the driver's door lock operation.
• Driver’s door: Unlock → Lock
OK: Normal condition are displayed for all
the items.
Q: Are the check result normal?
YES :
Go to Step 2.
NO :
Refer to inspection procedure Q-15 "The
driver's door lock actuator switch signal is
not received <LH drive vehicles>
or <RH drive vehicles>
."
Step 2. Retest the system.
Check that the central door locking system works
normally by the driver's door lock operation.
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 C-3: The central door locking system does not function by using the
passenger's door key cylinder.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
Item No.
Item name
Normal
condition
Item 21
DR DOR LCK SW
from OFF
to ON
Item 22
DR DOR ULK SW
from ON
to OFF
ETACS-ECU
FUSIBLE
LINK
ALL DOOR LOCK ACTUATOR
INPUT SIGNAL
Central Door Lock (Door Key Switch) Circuit
FRONT
PASSENGER'S
DOOR KEY
SWITCH
30
· DOOR LOCK ACTUATOR
(FRONT: LH) <LHD>
· DOOR LOCK ACTUATOR
(FRONT: RH) <RHD>
DOOR
UNLOCK
RELAY
DOOR
LOCK
RELAY
TAILGATE
OPEN RELAY
TAILGATE
LOCK ACTUATOR
J/B SIDE
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-111
COMMENT ON TROUBLE SYMPTOM
If the central door locking system does not work
normally only when the front passenger's key
cylinder is operated, the front passenger's door key
switch or the ETACS-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the front passenger’s door key
switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal, which is related to
the front passenger's key cylinder operation.
• passenger’s door lock key cylinder: Neutral to
lock
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
YES :
Go to Step 2.
NO :
Refer to inspection procedure Q-16 "The
passenger's door lock key switch signal is
not received <LH drive vehicles>
or <RH drive vehicles>
."
Step 2. Retest the system.
Check that the central door locking system works
normally by the front passenger's key cylinder
operation.
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.
Item No. Item name
Normal condition
Item 26
CNTR DOOR LCK
ON (only when
operated to lock)
Item 27
CNTR DOOR ULK
OFF
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-112
Inspection Procedure C-4: The central door locking system does not function by using the tailgate
key cylinder.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENT ON TROUBLE SYMPTOM
If the central door locking system does not work
normally only when the tailgate key cylinder is
operated, the tailgate key switch or the ETACS-ECU
may be defective.
POSSIBLE CAUSES
• Malfunction of the tailgate key switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal, which is related to
the tailgate key cylinder operation.
• Tailgate key switch: Neutral to lock
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
ETACS-ECU
· DOOR LOCK ACTUATOR
(FRONT: LH) <LHD>
· DOOR LOCK ACTUATOR
(FRONT: RH) <RHD>
DOOR
UNLOCK
RELAY
DOOR
LOCK
RELAY
TAILGATE
OPEN RELAY
TAILGATE
KEY SWITCH
INPUT SIGNAL
ALL DOOR LOCK ACTUATOR
TAILGATE
LOCK ACTUATOR
Central Door Lock (Tailgate Key Switch) Circuit
J/B SIDE
FUSIBLE
LINK
30
Item No.
Item name
Normal
conditions
Item 18
TRK UNLOCK SW
OFF
Item 19
GATE LOCK SW
ON (only when
operated to
lock)
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-113
YES :
Go to Step 2.
NO :
Refer to inspection procedure Q-17 "The
tailgate key switch signal is not received
Step 2. Retest the system.
Check that the central door locking system works
normally by the tailgate key cylinder operation.
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.
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