Mitsubishi Lancer (4A9 engine). Manual - part 225

ETACS

CHASSIS ELECTRICAL

54A-562

Inspection Procedure 6: The front door switch (passenger’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 (passen-
ger’s side) input signal, the door switch (passenger’s
side) signal is no longer output to the communication
line.

ETACS-
ECU

Front Door Switch (Passenger's Side) Input Circuit

FRONT DOOR
SWITCH (RH) (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 : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

NOTE

: LHD
: RHD

AC701240

Connector: C-313 <LHD>
ETACS-ECU

C-313 (BR)

AC701241

Connector: C-313 <RHD>
ETACS-ECU

C-313 (BR)

AC801769AI

Connector: D-25

AC612722

Connector: D-38

ETACS

CHASSIS ELECTRICAL

54A-563

PROBABLE CAUSES

• Malfunction of front door switch (RH) <LH drive

vehicles>

• Malfunction of front door switch (LH) <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 (RH) <LH drive vehi-
cles> or (LH) <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-38 front door switch
(RH) <LH drive vehicles> or D-25 front door
switch (LH) <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 (RH) <LH drive
vehicles> or (LH) <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 (RH) <LH
drive vehicles> or (LH) <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-38
front door switch (RH) <LH drive vehicles> or D-
25 front door switch (LH) <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 front passenger'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 257

As door ajar switch

Open

ETACS

CHASSIS ELECTRICAL

54A-564

Inspection Procedure 7: The rear door switch (RH) 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 rear door switch (RH) input
signal, the rear door switch (RH) signal is no longer
output to the communication line.

PROBABLE CAUSES

• Malfunction of rear door switch (RH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-
ECU

REAR DOOR
SWITCH (RH)

Rear Door Switch (RH) 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

AC701240

Connector: C-313 <LHD>
ETACS-ECU

C-313 (BR)

AC701241

Connector: C-313 <RHD>
ETACS-ECU

C-313 (BR)

AC801769AJ

Connector: D-08

ETACS

CHASSIS ELECTRICAL

54A-565

DIAGNOSIS PROCEDURE

STEP 1. Check the installation condition.
Check that the rear door switch (RH) 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-08 rear door switch
(RH) connector

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the defective connector.

STEP 3. Rear door switch (RH) check
Refer to GROUP 42A

− Door .

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Replace the rear door switch (RH).

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-08
rear door switch (RH) connector terminal No. 3
and the C-313 ETACS-ECU connector terminal
No. 8
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 rear right 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 258

RR door ajar switch

Open

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