Mitsubishi 380. Manual - part 96

 

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Mitsubishi 380. Manual - part 96

 

 

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-381

INSPECTION PROCEDURE K-4: Interior Light: The ignition key hole illumination lamp does not 
illuminate or go out normally.

NOTE: This troubleshooting procedure requires the 
use of diagnostic tool MB991958 and SWS monitor 
kit MB991813. For details on how to use the SWS 
monitor, refer to "How to connect SWS monitor 

P.54B-13

."

.

CIRCUIT OPERATION

• When the driver's door is opened with the ignition 

switch at "ACC" position, the ETACS-ECU illumi-
nates the ignition key hole illumination lamp.

• The ignition key hole illumination lamp goes out 

in 30 seconds after the driver's door is closed. 
The ignition key hole illumination lamp remains 
illuminated for 30 seconds after the ignition key is 
pulled out.

• The ETACS-ECU operates the ignition key hole 

illumination lamp according to the input signals 
from the following switches:

• Ignition switch (IG1): OFF

• Key reminder switch: OFF

• Interior lamp loaded signal: ON

• Vehicle condition:

• Ignition switch: "LOCK" (OFF) or "ACC" posi-

tion

• Ignition key: Removed from the ignition key 

cylinder

• Driver’s door: Opened or closed

.

TECHNICAL DESCRIPTION (COMMENT)

If the ignition key hole illumination lamp does not illu-
minate, the input circuits from the switches described 
in "CIRCUIT OPERATION", the key reminder switch 
(ignition key hole illumination lamp bulb) or the 
ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Trouble in input signal system

• The wiring harness or connectors may have 

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

• The ETACS-ECU may be defective

25DB113A

CONNECTOR: C-29

54DB006A

CONNECTORS: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

45

46

48 47

49

50
59

51
60

52

53
62

65

61

54
63

56

68

64

67 66

57

58

55

54DB004A

CONNECTOR: C-310

HARNESS SIDE

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-382

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Test Probe Harness

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-383

STEP 1. Use diagnostic tool MB991958 to select "ECU 
COMM Check" on the SWS monitor display. 
Check the ETACS-ECU.

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special 
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS 

monitor 

P.54B-13

."

(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate diagnostic tool MB991958 according to the 

procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."

(4) Diagnostic tool MB991958 should show "OK" on the "ECU 

COMM Check" menu for the "ETACS ECU" menu.

Q: Is "OK" displayed for the "ETACS ECU" menu?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure A-3 "Communication 

with the ETACS-ECU is not possible 

P.54B-74

."

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-384

STEP 2. Check the input signal by using "DATA LIST" 
menu of the SWS monitor.
Check the input signals from the following switches:

• Ignition switch: OFF

• Driver's door: open

• Front passenger's door: closed

(1) Operate diagnostic tool MB991958 according to the 

procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f.

Select "ETACS ECU."

(2) Check that normal conditions are displayed for the items 

described in the table below.

Q: Does the diagnostic tool MB991958 display the items 

"IG SW (IG1)" and "FRONT DOOR SW" as normal 
condition?
Normal conditions are displayed for all the items : 
Go to 

Step 3.

Normal condition is not displayed for "IG SW (IG1)" : 

Refer to Inspection Procedure M-2 "ETACS-ECU 
does not receive any signal from the ignition switch 
(IG1) 

P.54B-408

."

Normal condition is not displayed for "FRONT DOOR 
SW" : 
Refer to Inspection Procedure M-4 "ETACS-ECU 

does not receive any signal from the front door 
switches 

P.54B-413

."

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 30

IG SW(IG1)

OFF

ITEM 32

FRONT DOOR SW

ON

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB

 

 

 

 

 

 

 

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