Mitsubishi Galant 9G. Manual — part 64

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-252

INSPECTION PROCEDURE F-3: Sunroof: Sunroof Timer Function does not Work Normally.

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

P.54B-15

."

.

CIRCUIT OPERATION

• The sunroof timer function works according to the

signals from the following switches:

• Ignition switch (IG1): OFF

• Front door switch: OFF

• Vehicle condition

• Ignition switch: LOCK position

• Front door: Closed

• When the driver’s door is opened and closed

while the sunroof timer function is on, the sunroof
operative duration will be changed.

.

TECHNICAL DESCRIPTION (COMMENT)

Is the sunroof timer function does not work normally,
the input circuits from the switches described in
"CIRCUIT OPERATION", the sunroof motor assem-
bly, the ETACS-ECU or the SWS communication line
may be defective.

.

TROUBLESHOOTING HINTS

• The front door switch may be defective

• The sunroof motor assembly may be defective

• The wiring harness or connectors may have

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

DIAGNOSIS

Required Special Tools:

• MB991223: Test Harness Set

• MB991958: Scan 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: Probe Harness

SUNROOF-ECU

SUNROOF MOTOR
ASSEMBLY

·

FRONT DOOR

SWITCH (LH)

· IGNITION SWITCH (IG1)
· SUNROOF ECU ACK

INPUT SIGNAL

Sunroof Timer Function

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-253

STEP 1. Use scan tool MB991958 to select "ECU COMM
Check" on the SWS monitor display.
Check the following ECUs:

• ETACS-ECU

• Sunroof-ECU

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. Connect
special tool MB991910 before connecting 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 the scan 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) Scan tool MB991958 should show "OK" on the "ECU

COMM Check" menus for both the "ETACS ECU" and the
"SUNROOF ECU" menus.

Q: Is "OK" displayed for both the "ETACS ECU" and

"SUNROOF ECU" menus?
"OK" is displayed for all the items : Go to Step 2.
"NG" is displayed for the "ETACS ECU" menu : Refer to

Inspection Procedure A-3 "Communication with the
ETACS-ECU is not possible

P.54B-78

."

"NG" is displayed for the "SUNROOF ECU" menu :

Refer to Inspection Procedure A-5 "Communication
with the sunroof-ECU is not possible

P.54B-93

."

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH
CONNECTOR

COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE

MB991812

AB

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-254

STEP 2. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Observe how the input signal is changed when the ignition
switch is turned from the ON position to the "LOCK" (OFF)
position.
(1) Operate the MUT-III according to the procedure below to

display "SUNROOF-OPE."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "SUNROOF."
g. Select "SUNROOF-OPE."

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

described in the table below.

Q: Does the MUT-III display the items "IG SW (IG1)" and

"S/R ECU ACK" as normal condition?
Normal conditions displayed for all the items : Replace

the sunroof motor assembly. Check that the sunroof
timer function works normally.

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

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

P.54B-470

."

Normal condition is not displayed for the "S/R ECU
ACK" : Replace the sunroof motor assembly. Check that the

sunroof timer function works normally.

ITEM NO.

ITEM NAME

NORMAL
CONDITION

ITEM 30

IG SW (IG1)

OFF

ITEM 72

S/R ECU ACK

NORMAL ACK

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH
CONNECTOR

COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE

MB991812

AB

NEXT>>

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-255

54B

WINDSHIELD WIPER AND WASHER

GENERAL DESCRIPTION CONCERNING THE WINDSHIELD WIPER AND WASHER

M1549021500257

The following ECUs affect the functions and control
of the windshield wiper and washer.

Windshield wiper and washer control function

.

Intermittent control (vehicle speed-dependent
variable type)

ETACS-ECU uses the dial position of the variable intermittent
wiper control switch and the vehicle speed signal sent by the
combination meter to calculate the interval to be sent to the
front-ECU.
NOTE: The speed-sensitive wiper can be customized on vehi-
cles equipped with a multi center display (middle grade type).
Refer to

P.54B-555

.

The front-ECU determines the intermittent time T1 from the
input SWS data signal, and turns ON the windshield wiper drive
signal. When the wiper is at the STOP position, the windshield
wiper auto-stop signal goes OFF, then turns OFF the wind-
shield wiper drive signal. After the intermittent time T1 seconds
from when the windshield wiper drive signal turned ON, the
windshield wiper drive signal is turned ON again and the above
operation is repeated.
NOTE: If the intermittent time T1 is within 2 seconds, the wiper
is operated consecutively at LOW-speed by the front-ECU.

.

FUNCTION

CONTROL ECU

Windshield wiper and washer
control function

Intermittent control (Vehicle
speed-dependent variable type)

ETACS-ECU, front-ECU, column
switch

Mist wiper control

ETACS-ECU, column switch

Low speed wiper and high speed
wiper control

ETACS-ECU, column switch

Washer control

ETACS-ECU, column switch

AC305397

Intermittent

time T1

(seconds)

Variable intermittent wiper

control switch position

Intermittent

time T1

(seconds)

Vehicle speed (km/h)

When at SLOW position

Change in intermittent time
according to vehicle speed

Change in intermittent time by variable
intermittent wiper control switch (when
vehicle is stationary)

0

100

19.0

0

FAST

SLOW

19.0

AB

60

4.6

14.0

4.6

1.6

When at FAST position

2.0

AC200355AC

ON

OFF

ON

OFF

WINDSHIELD
WIPER
AUTOSTOP
SIGNAL

WINDSHIELD
WIPER DRIVE
SIGNAL

T1

T1

T1: Intermittent time

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