Mitsubishi Grandis. Manual — part 131
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-521
AC312037
Connector: C-221 <LHD>
Junction block (Rear view)
AD
Harness side
AC312047
Connector: C-221 <RHD>
Junction block (Rear view)
AD
Harness side
AC310650
AB
Connectors: E-02, E-11
Harness side
E-02
E-11
E-02
E-11
<Vehicles without
sunroof-LHD>
AC310654
AB
Connectors: E-02, E-11
Harness side
E-02
E-11
E-02
E-11
<Vehicles without
sunroof-RHD>
AC310652
AB
Connectors: E-02, E-11
Harness side
E-02
E-11
E-02
E-11
<Vehicles with
sunroof-LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-522
NOTE:
Prior to the wiring harness inspection, check
intermediate connector E-11 and C-128, and repair if
necessary.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
Step 7. Retest the system.
Check that the interior lamp signal is received
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.
AC310656
AB
Connectors: E-02, E-11
Harness side
E-02
E-11
E-02
E-11
<Vehicles with
sunroof-RHD>
AC312031
AL
Connector: C-128 <LHD>
AC312043AL
Connector: C-128 <RHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-523
Inspection Procedure Q-23: Each switch signal of the keyless entry transmitter is not received.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the keyless entry transmitter is
used to operate the keyless entry system. If the
signal is abnormal, the keyless entry system will not
work normally.
POSSIBLE CAUSES
• Malfunction of the keyless entry transmitter
• Defective battery of the keyless entry transmitter
• Malfunction of the ETACS-ECU
DIAGNOSTIC PROCEDURE
Step 1. Pulse check
Check whether the ETACS-ECU receives signal from
a transmitter or not. For this check, you should use
the 2-button-type transmitter (integrated with a key),
which cover screw is silver and has already been
registered.
NOTE: For how to register the keyless entry
transmitter encrypted code, refer to GROUP 42
−
On-vehicle Service
.
OK: The MUT-III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Go to Step 4.
Step 2. Check the transmitter battery.
Refer to GROUP 42
− Keyless entry system
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the keyless entry transmitter
battery.
Step 3. Register the encrypted code, and then
retest the system.
(1) Register the keyless entry transmitter again.
(2) Check that each signal is received from the
keyless entry transmitter.
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 keyless entry transmitter.
Step 4. Retest the system.
Check that each signal is received from the keyless
entry transmitter.
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.
W3Z10E39AA
KEYLESS ENTRY
TRANSMITTER
KEYLESS ENTRY
RECEIVER
ETACS-ECU
Transmitter Input Circuit
System switch
Check condition
Keyless entry transmitter
"LOCK/UNLOCK" switch
When the switch is
turned from off to on
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-524
Inspection Procedure Q-24: The interior lamp loaded signal is not detected.
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
The interior lamp automatic-shutdown function
operates in accordance with the interior lamp loaded
signal. If this signal is abnormal, the functions below
will not work normally.
• Ignition key cylinder illumination lamp
• Room lamps
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged wiring harness or connector(s)
DIAGNOSTIC PROCEDURE
Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.
Q: Is the check result normal?
Interior Lamp Automatic Shut-off Function Circuit
IGNITION
SWITCH (IG1)
IGNITION
SWITCH (ACC)
RELAY
BOX
<LHD>
<RHD>
· DOOR LAMP
· LUGGAGE
COMPARTMEMT LAMP
· ROOM LAMP
· REAR PERSONAL 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
LOAD
DETERMINATION
CIRCUIT
ETACS-ECU
POWER
SOURCE
J/B SIDE
KEEP
RELAY
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