Mitsubishi L200. Manual - part 787

ETACS

CHASSIS ELECTRICAL

54A-515

STEP 5. Check the wiring harness between C-218 
ETACS-ECU connector terminal No.2 and body 
earth.

NOTE: 

Prior to the wiring harness inspection, check junction 
block connector C-208, 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 6. Retest the system.
Check that the battery power supply circuit to the 
ETACS-ECU is normal.

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 and register the 
ID codes (Refer to 

P.54A-39

).

AC509935AK

Connectors: C-208, C-218 <LHD>

C-208

Harness side

C-208

C-218

Junction block side

C-218

AC509943

Connector: C-218 <RHD>

AC

Junction block

 (Rear view)

Junction block side

AC509936

Connectors: C-208 <RHD>

Harness side

C-208

AG

Junction block 
(Front view)

ETACS

CHASSIS ELECTRICAL

54A-516

Inspection procedure B-1: Lamp reminder buzzer function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Driver's door switch

• Tail lamp switch

• Headlamp switch

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be defec-
tive.

PROBABLE CAUSES

• Malfunction of the driver's door switch

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" 
(OFF) position, check that the ETACS-ECU does not 
set the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-494

.

NO : 

Go to Step 2.

STEP 2. M.U.T.-III data list
Check the input signals below, which are related to 
the lamp reminder buzzer function.

• Turn the ignition switch to the "LOCK" (OFF) 

position.

• Open the drive’s door.

• Turn the tail lamp or headlamp switch to the ON 

position.

OK: Normal conditions are displayed for all 
the items.

Q: Is the check result normal?

YES <All the signals are received normally.> : 

Go 

to Step 3.

NO <The driver's door switch signal is not 
received.> : 

Refer to inspection procedure C-5 

"One of the door switch signals is not 
received  

P.54A-540

."

NO <The ignition switch (IG1) signal is not 
received.> : 

Refer to inspection procedure C-3 

"The ignition switch (IG1) signal is not 
received 

P.54A-533

."

NO <The tail lamp or headlamp switch signal is not 
received.> : 

Refer to inspection procedure C-1 

"The column switch (lighting and wiper 
switch) signal is not received 

P.54A-523

."

Lamp Reminder Buzzer Function

ETACS-ECU

LIN COMMUNICATION LINE

COLUMN-ECU

INPUT SIGNAL

INPUT SIGNAL

· DRIVER'S DOOR SWITCH

· IGNITION SWITCH (IG1)

· TAIL LAMP SWITCH

· HEADLAMP SWITCH

Item 
No.

Item name

Normal condition

19

Drive’s door switch

ON

30

Ignition switch(IG1)

OFF

60

Headlamp output

Any of items is ON

59

Tail lamp output

ETACS

CHASSIS ELECTRICAL

54A-517

STEP 3. Retest the system.
The lamp reminder buzzer function should work nor-
mally.

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 and register the 
ID codes (Refer to 

P.54A-39

).

Inspection procedure B-2: Turn-signal lamp operation sound function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Turn-signal lamp switch

• Hazard warning lamp switch

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be defec-
tive.

PROBABLE CAUSES

• Malfunction of the column switch

• Malfunction of the hazard warning lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-494

.

NO : 

Go to Step 2.

STEP 2. Hazard warning lamps illumination 
check
When the hazard warning lamp switch is operated, 
check that the hazard warning lamps flash.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to Inspection Procedure 1 "The 
hazard warning lamps do not illuminate 

P.54A-215

."

STEP 3. Retest the system.
Check that the turn-signal lamp operation sound 
function works normally.

Q: Is the check result normal?

AC505471

Turn-Signal Lamp Operation Sound

ETACS-ECU

· HAZARD WARNING LAMP SWITCH

· IGNITION SWITCH (IG1) or (ACC)*

LIN COMMUNICATION LINE

COLUMN-ECU

INPUT SIGNAL

INPUT SIGNAL

TURN-SIGNAL LAMP SWITCH

NOTE:
*: When the turn-signal lamp can be operated with the ignition switch in the ACC position by using 
   customisation function.

AB

ETACS

CHASSIS ELECTRICAL

54A-518

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 and register the 
ID codes (Refer to 

P.54A-39

).

Inspection procedure B-3: Door ajar warning buzzer function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Driver's door switch

• Passenger's door switch

• Rear door switch

• Vehicle speed signal

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be defec-
tive.

PROBABLE CAUSES

• Malfunction of the driver's door switch

• Malfunction of the passenger's door switch

• Malfunction of the rear door switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check of adjustment details for the door 
ajar warning buzzer function
Check that the door ajar warning buzzer is set to 
either "Operation" or "Constantly" using the custom-
ise function of M.U.T-III.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Using the customise function of M.U.T-III, 
set the door ajar warning buzzer to either 
"Operation" or "Constantly."

STEP 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ). On completion, go 

to Step 5.

Door-Ajar Warning Buzzer Function

ETACS-
ECU

VEHICLE SPEED

ENGINE-ECU

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

INPUT SIGNAL

INPUT SIGNAL

· DOOR SWITCHES
· IGNITION SWITCH (IG1)