Mitsubishi Lancer Evolution IX. Manual — part 248
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-251
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-217, and repair if necessary.
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 17.
NO :
Repair the wiring harness.
Step 17. Retest the system.
Check that the luggage compartment lamp illumi-
nates and extinguishes 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.
AC310448
Harness side
Junction block (front view)
Connector: C-217
AC
<LHD>
AC310458
Harness side
Junction block (front view)
Connector: C-217
AC
<RHD>
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-252
INSPECTION PROCEDURE K--2: Interior lamp automatic shutdown function does not work normally.
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 auto-
matic shutdown function in accordance with the input
signals below.
• Ignition switch (ACC)
• Ignition switch (IG1)
• Driver's door 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 defec-
tive. 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 room lamp
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the adjustment function.
Check that the interior lamp automatic shutdown
function has been enabled by using the adjustment
function.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Enable the interior lamp automatic
shutdown function by using the adjustment
function (Refer to GROUP 54B
−
Adjustment function
INPUT SIGNAL
COMBINATION
METER
KEEP RELAY
LOAD
DETERMINATION
CIRCUIT
LOAD
DETERMINATION
CIRCUIT
· ALL DOOR
SWITCH
· DRIVER'S DOOR
SWITCH
· IGNITION
SWITCH (ACC)
· IGNITION
SWITCH (IG1)
· INTERIOR LAMP
LOADED SIGNAL
ETACS-ECU
· FRONT ROOM LAMP
· REAR ROOM LAMP
· LUGGAGE COMPARTMENT LAMP
J/B SIDE
RELAY BOX
(FUSE )
22
Interior Lamp Automatic Shutdown Function Circuit
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-253
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
ECUS TO BE CHECKED
• ETACS ECU
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 the ETACS-ECU is
not possible
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 L-2 "The
ignition switch (IG1) signal is not received
."
Normal condition is not displayed for item No.31. :
Refer to Inspection Procedure L-1 "The
ignition switch (ACC) signal is not received
."
Normal condition is not displayed for item No.32. :
Refer to Inspection Procedure L-3 "The door
switch (front: LH) signal is not received <LH
drive vehicles>
Inspection Procedure L-3 "The door switch
(front: RH) signal is not received <RH drive
vehicles>
."
Step 4. Pulse check.
Check the input signals below, which are related to
the interior lamp automatic shutdown function.
OK: The M.U.T.-II/III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
All the signals are received normally. :
Go to Step
5.
All the door switch signals are not received. :
Refer to Inspection Procedure L-11 "All the
door switch signals are not received <LH
drive vehicles>
." or refer to
Inspection Procedure L-11 "All the door
switch signals are not received <RH drive
vehicles>
The interior lamp loaded signal is not received. :
Refer to Inspection Procedure L-15 "The
interior lamp loaded signal is not detected
."
Step 5. 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.
Item No.
Item name
Normal condition
Item 30
IG SW(IG1)
OFF
Item 31
IG SW(ACC)
OFF
Item 32
DR DOOR SW
ON
System switch
Check condition
All of the door
switches
A door is opened when all the
doors are closed
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-254
INSPECTION PROCEDURE K--3: 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.
OPERATION
The ETACS-ECU operates this function in accord-
ance with all the door switch signals. If the door-ajar
warning lamp does not work normally, the input sig-
nal circuits from all the door switches or the
ETACS-ECU may be defective.
POSSIBLE CAUSES
• All the door switches are defective.
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the operation of the room lamp.
Check that the dome lamps illuminate and extinguish
normally.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure K-1 "The
front or rear room lamp does not illuminate
or extinguish normally
."
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
ETACS-ECU
· ALL DOOR SWITCH
INPUT SIGNAL
COMBINATION
METER
· DRIVER'S DOOR SWITCH
Door Ajar Indicator Lamp Circuit
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