Mitsubishi Evolution X. Manual - part 1072

ETACS

TSB Revision

CHASSIS ELECTRICAL

54A-649

STEP 1. Using scan tool MB991958, check data list.
Check the input signals from the front door lock actuators.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54A-579

."

(2) Turn the ignition switch to the "ON" position.
(3) Check the ETACS data list.

• Set the driver's door to "UNLOCK."

• Set the front passenger's door to "UNLOCK." <vehicles 

with KOS>

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are normal conditions displayed on the "Dr door unlock 

switch" and "As door unlock switch"?
YES <Normal conditions are displayed for all the items> 
: 

No action is necessary and testing is complete.

NO <Normal condition is not displayed for item No.271> 
: 

Go to Step 2.

NO <Normal condition is not displayed for item No.272> 
: 

Go to Step 8.

STEP 2. Check front door lock actuator (LH) connector 
E-16 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector. 
Q: Is front door lock actuator (LH) connector E-16 in good 

condition?
YES : Go to Step 3.
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 (LH) is normal.

Item No.

Item name

Normal 
condition

Item 271

Dr door unlock 
switch

Unlock

Item No.

Item name

Normal 
condition

Item 272

As door unlock 
switch

Unlock

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

ETACS

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CHASSIS ELECTRICAL

54A-650

STEP 3. Check the front door lock actuator (LH).
Disconnect front door lock actuator (LH) connector E-16. Then 
check continuity between the terminals.

Q: Is the front door lock actuator (LH) in good condition?

YES : Go to Step 4.
NO :  Replace the front door lock actuator (LH). Check that 

the input signal of front door lock actuator (LH) is 
normal.

STEP 4. Check the ground circuit to the front door lock 
actuator (LH). Measure the resistance at front door lock 
actuator (LH) connector E-16.
(1) Disconnect front door lock actuator (LH) connector E-16 

and measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminal 1 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Check the wiring harness between front door lock 
actuator (LH) connector E-16 (terminal 1) and ground.
Check the ground wires for open circuit.
NOTE: Also check intermediate connector C-128 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-128 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 

(LH) connector E-16 (terminal 1) and ground in good 
condition?
YES : No action is necessary and testing is complete.
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 (LH) is 
normal.

Lever position

Tester connection Specified 

condition

UNLOCK

1 

− 3

Continuity exists 

 

(2 ohms or less)

LOCK

1 

− 3

Open circuit

AC709322 AM

Harness side: E-16

ETACS

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CHASSIS ELECTRICAL

54A-651

STEP 6. 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 7.
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 (LH) is normal.

STEP 7. Check the wiring harness between front door lock 
actuator (LH) connector E-16 (terminal 3) and ETACS-ECU 
connector C-301 (terminal 22).
Check the input lines for open circuit and short circuit.
NOTE: Also check intermediate connector C-129 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-129 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 

(LH) connector E-17 (terminal 3) and ETACS-ECU 
connector C-301 (terminal 22) in good condition?
YES : Replace the ETACS-ECU. Check that the input signal 

of front door lock actuator (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 lock actuator (LH) is 
normal.

STEP 8. Check front door lock actuator (RH) connector 
E-07 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Is front door lock actuator (RH) connector E-07 in good 

condition?
YES : Go to Step 9.
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.

ETACS

TSB Revision

CHASSIS ELECTRICAL

54A-652

STEP 9. Check the front door lock actuator (RH).
Disconnect front door lock actuator (RH) connector E-07. Then 
check continuity between the terminals.

Q: Is the front door lock actuator (RH) in good condition?

YES : Go to Step 10.
NO :  Replace the front door lock actuator (RH). Check that 

the input signal of front door lock actuator (RH) is 
normal.

STEP 10. Check the ground circuit to the front door lock 
actuator (RH). Measure the resistance at front door lock 
actuator (RH) connector E-07.
(1) Disconnect front door lock actuator (RH) connector E-07 

and measure the resistance available at the wiring harness 
side of the connector.

(2) Measure the resistance value between terminal 3 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 12.
NO :  Go to Step 11.

STEP 11. Check the wiring harness between front door 
lock actuator (RH) connector E-07 (terminal 3) and ground.
Check the ground wires for open circuit.
NOTE: Also check intermediate connector C-116 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-116 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 3) and ground in good 
condition?
YES : No action is necessary and testing is complete.
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.

Lever position

Tester connection Specified 

condition

UNLOCK

1 

− 3

Continuity exists 

 

(2 ohms or less)

LOCK

1 

− 3

Open circuit

AC608255 BJ

Harness side: E-07