Mitsubishi Evolution X. Manual - part 1073

ETACS

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CHASSIS ELECTRICAL

54A-653

STEP 12. Check ETACS-ECU connector C-301 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-301 in good condition?

YES : Go to Step 13.
NO :  Repair or replace the damaged component(s) (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Check that the input signal of front door 

lock actuator (RH) is normal.

STEP 13. Check the wiring harness between front door 
lock actuator (RH) connector E-07 (terminal 1) and 
ETACS-ECU connector C-301 (terminal 10).
Check the input lines for open circuit and short circuit.
NOTE: Also check intermediate connector C-24 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-24 is damaged, repair or 
replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between front door lock actuator 

(RH) connector E-07 (terminal 1) and ETACS-ECU 
connector C-301 (terminal 10) in good condition?
YES : Replace the ETACS-ECU. Check that the input signal 

of front door lock actuator (RH) is normal.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Check that 
the input signal of front door lock actuator (RH) is 
normal.

ETACS

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CHASSIS ELECTRICAL

54A-654

Inspection Procedure 5: ETACS-ECU does not receive any signal from the front door switch (LH).

.

TECHNICAL DESCRIPTION (COMMENT)

If there is an error to the front door switch (LH) input 
signal, the front door switch (LH) signal is no longer 
output to the communication line.

.

TROUBLESHOOTING HINTS

• The front door switch (LH) may be defective

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

ETACS-
ECU

FRONT DOOR
SWITCH (LH)

Front Door Switch (LH) Input Circuit

AC708972AQ

Connector: C-313

ETACS-ECU

C-313 (BR)

AC708955AQ

Connector: D-28

ETACS

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CHASSIS ELECTRICAL

54A-655

STEP 1. Check front door switch (LH) connector D-28 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector. 
Q: Is front door switch (LH) connector D-28 in good 

condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s) (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Check that the input signal of front door 

switch (LH) is normal.

STEP 2. Check the front door switch (LH).
Remove the front door switch (LH). Then check the continuity 
between the switch terminals and the switch body.

Q: Is the driver's door switch in good condition?

YES : Go to Step 3.
NO :  Replace the front door switch (LH). Check that the 

input signal of front door switch (LH) is normal.

STEP 3. Measure at the lower metal part of the front door 
switch (LH) in order to check the ground circuit to the front 
door switch (LH).
NOTE: Check that the front door switch (LH) is grounded to the 
vehicle body by means of its mounting screw.
Remove the cap, and measure the resistance value between 
the lower metal part and the ground. 

• The resistance should equal 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 4.
NO :  Check the fit of the switch, and repair if necessary. 

Check that the input signal of front door switch (LH) is 
normal.

STEP 4. Check ETACS-ECU connector C-313 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector. 
Q: Is ETACS-ECU connector C-313 in good condition?

YES : Go to Step 5.
NO :  Repair or replace the damaged component(s) (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

). Check that the input signal of front door 

switch (LH) is normal.

Switch position

Tester 
connection

Specified condition

Released

3 

− switch body

Continuity exists 

 

(2 ohms or less)

Pressed

3 

− switch body

Open circuit

ETACS

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CHASSIS ELECTRICAL

54A-656

STEP 5. Check the wiring harness between driver's door 
switch connector D-28 (terminal 3) and ETACS-ECU 
connector C-313 (terminal 16).
Check the input lines for open circuit and short circuit.
Q: Is the wiring harness between driver's door switch 

connector D-28 (terminal 3) and ETACS-ECU connector 
C-313 (terminal 16) in good condition?
YES : Replace the ETACS-ECU. Check that the input signal 

of front door switch (LH) is normal.

NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Check that 
the input signal of front door switch (LH) is normal.

Inspection Procedure 6: ETACS-ECU does not receive any signal from the front door switch (RH).

.

ETACS-
ECU

FRONT DOOR
SWITCH (RH)

Front Door Switch (RH) Input Circuit

AC708972AQ

Connector: C-313

ETACS-ECU

C-313 (BR)

AC708954 AQ

Connector: D-43