Mitsubishi Grandis. Manual — part 27
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-105
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. Pulse check
Check the input signal, which is related to the tailgate
key cylinder operation.
OK: The MUT-III sound or the voltmeter
needle fluctuate.
Q: Is 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>
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
System switch
Check condition
Tailgate key cylinder
When the front tail gate
key cylinder is unlocked
or locked
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-106
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.
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-107
Inspection Procedure C-5: A door can not be locked or unlocked by the central door locking system.
<LH drive vehicles>
ETACS-ECU
DOOR LOCK
ACTUATOR
(FRONT: LH)
DOOR LOCK
ACTUATOR
(FRONT: RH)
DOOR LOCK
ACTUATOR
(REAR: LH)
DOOR LOCK
ACTUATOR
(REAR: RH)
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
DOOR
UNLOCK
RELAY
DOOR
LOCK
RELAY
J/B SIDE
Central Door Lock Circuit <LHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-108
COMMENT ON TROUBLE SYMPTOM
If a door or the tailgate can not be locked or unlocked
by the central door locking system, the door lock
actuator or the tailgate lock actuator may be
defective.
POSSIBLE CAUSES
• Malfunction of the door lock actuator
• Malfunction of the tailgate lock actuator
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Confirm which door lock actuator is
defective.
Q: Which door fails to lock correctly?
Driver's door :
Go to Step 2.
Front passenger's door :
Go to Step 6.
Rear right door :
Go to Step 10.
Rear left door :
Go to Step 14.
Step 2. Connector check: F-04 door lock actuator
(front: LH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
Step 3. Check the door lock actuator (front: LH)
Check that the door lock actuator (front: LH) works
normally. Refer to GROUP 42
− Door
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the door lock actuator (front: LH).
Step 4. Connector check: C-219, C-220
ETACS-ECU connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
AC311150
AC
Connector: F-04 <LHD>
Harness side
F-04(B)
AC310627
Connectors: C-219, C-220
<LHD>
C-220
AB
C-220
Junction block (Rear view)
Junction block side
C-219
C-219
Harness side
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