Mitsubishi Lancer (4A9 engine). Manual — part 224
ETACS
CHASSIS ELECTRICAL
54A-558
Inspection Procedure 4: The front door lock actuator signal is not received. <RH drive vehicles>
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
The front door lock actuator (RH) input signal is used
for the operation judgement of the functions below. If
the signal is abnormal, these functions will not work
normally.
• Central door locking
• KOS
• Keyless entry system
• Room lamp
Door Look Actuator Signal Input Circuit
ETACS-ECU
FRONT DOOR
LOCK ACTUATOR
(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 : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver
AC701241
BB
Connector: C-301 <RHD>
ETACS-ECU
AC612735
Connector:E-07 <RHD>
AE
E-07 (B)
ETACS
CHASSIS ELECTRICAL
54A-559
PROBABLE CAUSES
• Malfunction of the front door lock actuator (RH)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1.Connector check: E-07 front door lock
actuator (RH) connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
STEP 2. Front door lock actuator (RH) check
Refer to GROUP 42A
− 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-07
front door lock actuator (RH) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the E-07 front
door lock actuator (RH) connector terminal No. 3
and the body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
STEP 4. Wiring harness check between the E-07
front door lock actuator (RH) connector terminal
No. 3 and the body earth
Check the earth wires for open circuit.
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-111, and repair if neces-
sary.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Repair the wiring harness.
STEP 5. Connector check C-301 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
STEP 6. Wiring harness check between the E-07
front door lock actuator (RH) connector terminal
No. 1, 2 and the C-301 ETACS-ECU connector
terminal No. 22, 11.
Check the input line for open circuit.
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-112, and repair if neces-
sary.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 7. M.U.T.-III data list
Change the status of driver's door from unlocked to
locked.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Replace the ETACS-ECU.
Item No.
Item name
Normal
condition
Item 270
Dr door lock switch Not lock
→
Lock
Item 271
Dr door unlock
switch
Unlock
→ Not
Unlock
ETACS
CHASSIS ELECTRICAL
54A-560
Inspection Procedure 5: The front door switch (driver’s side) signal is not received.
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If there is an error to the front door switch (driver’s
side) input signal, the front door switch (driver’s side)
signal is no longer output to the communication line.
ETACS-
ECU
FRONT DOOR
SWITCH (LH) (RH)
Front Door Switch (Driver's Side) Input Circuit
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver
NOTE
: LHD
: RHD
AC701240
AU
Connector: C-313 <LHD>
ETACS-ECU
C-313 (BR)
AC701241
BA
Connector: C-313 <RHD>
ETACS-ECU
C-313 (BR)
AC801769AI
Connector: D-25
AC612722
BO
Connector: D-38
ETACS
CHASSIS ELECTRICAL
54A-561
PROBABLE CAUSES
• Malfunction of front door switch (LH) <LH drive
vehicles>
• Malfunction of front door switch (RH) <RH drive
vehicles>
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check the installation condition.
Check that the front door switch (LH) <LH drive vehi-
cles> or (RH) <RH drive vehicles> is installed to the
body correctly.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Correct the installation condition.
STEP 2. Connector check: D-25 front door switch
(LH) <LH drive vehicles> or D-38 front door
switch (RH) <RH drive vehicles> connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. Front door switch (LH) <LH drive
vehicles> or (RH) <RH drive vehicles> check
Refer to GROUP 42A
− Door .
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the front door switch (LH) <LH
drive vehicles> or (RH) <RH drive
vehicles>.
STEP 4. Connector check: C-313 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
STEP 5. Wiring harness check between the D-25
front door switch (LH) <LH drive vehicles> or D-
38 front door switch (RH) <RH drive vehicles>
connector terminal No. 3 and the C-313 ETACS-
ECU connector terminal No. 16
Check the input lines for open circuit and short cir-
cuit.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the wiring harness.
STEP 6. M.U.T.-III data list
Open the driver's door.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Replace the ETACS-ECU.
Item No.
Item name
Normal
condition
Item 256
Dr door ajar switch
Open
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