Mitsubishi Lancer (4A9 engine). Manual - part 226

 

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Mitsubishi Lancer (4A9 engine). Manual - part 226

 

 

ETACS

CHASSIS ELECTRICAL

54A-566

Inspection Procedure 8: The rear door switch (LH) 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 (LH) input 
signal, the rear door switch (LH) signal is no longer 
output to the communication line.

PROBABLE CAUSES

• Malfunction of rear door switch (LH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-
ECU

REAR DOOR
SWITCH (LH)

Rear Door Switch (LH) 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

AC701240

AU

Connector: C-313 <LHD>
ETACS-ECU

C-313 (BR)

AC701241

BA

Connector: C-313 <RHD>
ETACS-ECU

C-313 (BR)

AC801769 AK

Connector: D-18

ETACS

CHASSIS ELECTRICAL

54A-567

DIAGNOSIS PROCEDURE

STEP 1. Check the installation condition.
Check that the rear door switch (LH) 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-18 rear door switch 
(LH) connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

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

− Door .

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the rear door switch (LH).

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-18 
rear door switch (LH) connector terminal No. 3 
and the C-313 ETACS-ECU connector terminal 
No. 7
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 left 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 259

RL door ajar switch

Open

ETACS

CHASSIS ELECTRICAL

54A-568

Inspection Procedure 9: The trunk lid latch signal is not received. <LANCER>

CAUTION

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.

ETACS-ECU

TRUNK LID 
LATCH

Trunk Lid Latch 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

AU

Connector: C-313 <LHD>
ETACS-ECU

C-313 (BR)

AC701241

BA

Connector: C-313 <RHD>
ETACS-ECU

C-313 (BR)

ETACS

CHASSIS ELECTRICAL

54A-569

COMMENTS ON TROUBLE SYMPTOM
If there is an error to the trunk lid latch input signal, 
the trunk lid latch signal is no longer output to the 
communication line.

PROBABLE CAUSES

• Malfunction of trunk lid latch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: F-14 trunk lid latch 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

STEP 2. trunk lid latch check
Refer to GROUP 42A 

− Trunk lid .

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the trunk lid latch.

STEP 3. Resistance measurement at the F-14 
trunk lid latch connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the F-14 trunk 

lid latch connector terminal No. 2 and the body 
earth.

OK: Continuity exists (2 

 or less)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

STEP 4. Wiring harness check from F-14 trunk lid 
latch connector terminal No. 2 to body earth
NOTE: Prior to the wiring harness inspection, check 
intermediate connector F-28, 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 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

NO : 

Repair the wiring harness.

STEP 5. Connector check: C-313 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 F-14 
trunk lid latch connector terminal No. 1 and the 
C-313 ETACS-ECU connector terminal No. 5
NOTE: Prior to the wiring harness inspection, check 
intermediate connectors D-17 and F-28, and repair if 
necessary.
Check the input lines for open circuit and short cir-
cuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

STEP 7. M.U.T.-III data list
Open the trunk.

OK: Normal condition is displayed.

Q: Is the check result normal?

AC612723

AZ

Connector: D-17

AC701264 AE

Connectors: F-14, F-28

F-28

F-14

Item No.

Item name

Normal 
conditio
n

Item 260

Trunk/gate trunk ajar 
switch

Open

 

 

 

 

 

 

 

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