Mitsubishi Lancer Evolution IX. Manual — part 259
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-295
Step 6. Pulse check
Check the input signals from all the door switches.
OK: The M.U.T.-II/III sounds or the voltmeter
needle fluctuates.
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.
System switch
Check condition
All of the door switches
A door is opened when
all the doors are closed
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-296
INSPECTION PROCEDURE L-12: The front door lock actuator (LH) switch signal is not received. <LH
drive vehicles>
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the front door lock actuator (LH) is
used to operate the functions below. If the signal is
abnormal, these functions will not work normally.
• Key reminder function
• Central door locking
• Keyless entry system
• Room lamps
POSSIBLE CAUSES
• Malfunction of the front door lock actuator (LH)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
ETACS-ECU
DOOR LOCK
ACTUATOR
(FRONT: LH)
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
Front Door Lock Actuator Input Circuit <LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-297
DIAGNOSIS PROCEDURE
Step 1. Connector check: E-04 front door lock
actuator (LH) connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Check the front door lock actuator (LH).
Refer to GROUP 42
− Door
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the front door lock actuator (RH).
Step 3. Resistance measurement at the E-04 front
door lock actuator (LH) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Resistance between E-04 front door lock actuator
(LH) connector terminal No.1 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
Step 4. Check the wiring harness between E-04
front door lock actuator (LH) connector terminal
No.1 and body earth
NOTE:
Prior to the wiring harness inspection, check interme-
diate connector C-17, and repair if necessary.
• Check the earth wires for open circuit.
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 :
Repair the wiring harness.
AC310486
Harness side
AB
Connector: E-04
<LHD>
E-04(B)
Rear door (LH)
AC310486
Harness side
AB
Connector: E-04
<LHD>
E-04(B)
Rear door (LH)
AC301541GW
Connector E-04
(Harness side)
5
6
4
2
3
1
AC310486
Harness side
AB
Connector: E-04
<LHD>
E-04(B)
Rear door (LH)
AC310446
Connector: C-17
AC
<LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-298
Step 5. Connector check: C-227 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Step 6. Check the wiring harness from E-04 front
door lock actuator (LH) connector terminal Nos.2
and 3 to C-227 ETACS-ECU connector terminal
Nos.35 and 36.
NOTE:
Prior to the wiring harness inspection, check interme-
diate connector C-17, 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. Pulse check
Check the input signal from the front door lock actua-
tor (LH) switch.
OK: The M.U.T.-II/III sounds or the voltmeter
needle fluctuates.
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.
AC310450
Connector: C-227
AG
Junction block
(rear view)
Harness side
<LHD>
28
37
43
29
44
38
23
32
41
24
25
26
27
34
42
36 35
33
21
22
30
39
40
31
AC310450
Connector: C-227
AG
Junction block
(rear view)
Harness side
<LHD>
28
37
43
29
44
38
23
32
41
24
25
26
27
34
42
36 35
33
21
22
30
39
40
31
AC310486
Harness side
AB
Connector: E-04
<LHD>
E-04(B)
Rear door (LH)
System switch
Check condition
Front door lock actuator
(LH) switch
When the driver's door is
unlocked or locked
AC310446
Connector: C-17
AC
<LHD>
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