Mitsubishi Galant. Manual — part 574

SUNROOF

TSB Revision

BODY

42-79

INSPECTION PROCEDURE 3: The sunroof motor does not operate.

CIRCUIT OPERATION

The sunroof-ECU monitors the sunroof switch
status (slide open, slide close, tilt down, tilt up)
and the load detection sensor in the sunroof
motor and operates the sunroof motor.

TECHNICAL DESCRIPTION (COMMENT)

The cause may be a malfunction of the sunroof
motor power supply/ground circuit system.

TROUBLESHOOTING HINTS

Malfunction of the sunroof-ECU

Malfunction of the sunroof motor

Damaged harness wires or connectors

AC000629AB

Sunroof Motor Circuit

AC000623AE

CONNECTORS: D-03, D-04

D-03

D-04

SUNROOF

TSB Revision

BODY

42-80

DIAGNOSIS

STEP 1. Check the power supply/ground line at the
sunroof motor connector D-04.
(1) Remove the headlining. (Refer to GROUP 52A, Headlining

P.52A-14

.)

(2) Disconnect the sunroof motor connector D-04 and measure

at the harness side.

(3) Turn the ignition key "ON".
(4) Measure the voltage between terminal 1 and ground while

the sunroof switch is depressing to the slide open/close
position. And measure the voltage between terminal 4 and
ground while the sunroof switch is depressing to the slide
open/close position.

Voltage should be approximately 12 volts (battery
positive voltage).

Q: Is the voltage approximately 12 volts?

YES : Go to Step 3.
NO : Go to Step 2.

STEP 2. Check the harness wires between sunroof-ECU
connector D-03 and sunroof motor connector D-04.
Q: Are there any damaged wires between sunroof-ECU

connector D-03 and sunroof motor connector D-04?
YES :
Repair them, then go to Step 3.
NO : Replace the sunroof-ECU. Then go to Step 3.

STEP 3. Check the sunroof motor.
(1) Remove the sunroof motor. (Refer to

P.42-92

.)

(2) Check the direction of rotation of the drive gear when the

battery is connected to the connector.

Q: Is the sunroof motor damaged?

YES : Replace it, then go to Step 4.
NO : Go to Step 4.

STEP 4. Check symptoms

Q: Does the sunroof open and close normally?

YES : This diagnosis is complete.
NO : Return to Step 1.

AC000630

5 4

3 2

1

8 7 6

D-04 (HARNESS SIDE)

AB

AC000623AE

CONNECTORS: D-03, D-04

D-03

D-04

TESTER CONNECTION

DRIVE GEAR ROTATION
DIRECTION

1

Battery(+), 4

Battery(-)

LEFT

4

Battery(+), 1

Battery(-)

RIGHT

AC000631AB

DRIVE GEAR

LEFT ROTATION

RIGHT ROTATION

SUNROOF

TSB Revision

BODY

42-81

INSPECTION PROCEDURE 4: The sunroof motor does not stop rotating when the roof lid reaches the
fully closed/opened position.

CIRCUIT OPERATION

When the sunroof motor operation fully closes or
fully opens the roof lid, the sunroof-ECU uses a
limit switch signal to stop the sunroof motor.

TECHNICAL DESCRIPTION (COMMENT)

The cause may be a malfunction of the sunroof
motor limit switch power supply circuit system or
the ground circuit system.

TROUBLESHOOTING HINTS

Malfunction of the sunroof-ECU

Malfunction of the sunroof motor limit switch

Damaged harness wires or connectors

AC000632AB

Sunroof Motor Limit Switch Circuit

AC000623AE

CONNECTORS: D-03, D-04

D-03

D-04

SUNROOF

TSB Revision

BODY

42-82

DIAGNOSIS

STEP 1. Check the power supply/ground line at the
sunroof motor connector D-04.
(1) Remove the headlining. (Refer to GROUP 52A, Headlining

P.52A-14

.)

(2) Disconnect the sunroof motor connector D-04 and measure

at the harness side.

(3) Turn the ignition key "ON".
(4) Measure the voltage between terminal 6 and ground.

Voltage should be approximately 12 volts (battery
positive voltage).

Q: Is the voltage approximately 12 volts?

YES : Go to Step 4.
NO : Go to Step 2.

STEP 2. Check the harness wires between sunroof-ECU
connector D-03 and sunroof motor connector D-04.
Q: Are there any damaged wires between sunroof-ECU

connector D-03 and sunroof motor connector D-04?
YES :
Repair them, then go to Step 3.
NO : Replace the sunroof-ECU. Then go to Step 4.

STEP 3. Check the sunroof motor limit switch.
(1) Remove the limit switch from the sunroof motor. (Refer to

P.42-92

.)

(2) Check the limit switch continuity.

Q: Is the limit switch damaged?

YES : Replace the sunroof motor. Then go to Step 4.
NO : Replace the sunroof-ECU. Then go to Step 4.

STEP 4. Check symptoms

Q: Does the sunroof open and close normally?

YES : This diagnosis is complete.
NO : Return to Step 1.

AC000633

5 4

3 2

1

8 7 6

D-04 (HARNESS SIDE)

AB

AC000623AE

CONNECTORS: D-03, D-04

D-03

D-04

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

ON

6

8

Continuity

OFF

No continuity

AC000634AB

ON

OFF

Была ли эта страница вам полезна?
Да!Нет
6 посетителей считают эту страницу полезной.
Большое спасибо!
Ваше мнение очень важно для нас.

Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.

Текст

Политика конфиденциальности