Mitsubishi 380. Manual - part 22

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-85

STEP 7. Check the wiring harness between front-ECU
connector A-12X (terminal 21) and ground.
Q: Is the wiring harness between front-ECU connector

A-12X (terminal 21) and ground in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. The system
should communicate with the front-ECU normally.

STEP 8. Check ETACS-ECU connector C-218 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-218 in good condition?

YES : Go to Step 9.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The system should communicate with the

front-ECU normally.

STEP 9. Check the wiring harness between front-ECU
connector A-12X (terminal 30) and ETACS-ECU connector
C-218 (terminal 53).

AC305977

CONNCTOR: A-12X

RELAY BOX SIDE

54DB006A

CONNECTORS: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

48 47

50
59

51
60

53
62

54
63

67 66

AC305977

CONNCTOR: A-12X

RELAY BOX SIDE

54DB006A

CONNECTORS: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

48 47

50
59

51
60

53
62

54
63

67 66

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-86

NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

Q: Is the wiring harness between front-ECU connector

A-12X (terminal 30) and ETACS-ECU connector C-218
(terminal 53) in good condition?
YES : Go to Step 10.
NO : The wiring harness may be damaged or the

STEP 10. Replace the front-ECU.
(1) Replace the front-ECU.
(2) The system should communicate with the front-ECU

normally.

Q: Can the system communicate with the front-ECU?

YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. The system should

communicate with the front-ECU normally.

54DB052A

C-29

CONNECTOR: C-29

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-87

INSPECTION PROCEDURE A-5: Communication with the Sunroof-ECU is not Possible.

CIRCUIT OPERATION

• Power to the sunroof motor assembly is supplied

through fusible link (5).

• When the ignition switch (IG2) signal is on, the

sunroof motor assembly is ready to operate.

• Refer to circuit diagrams GROUP-

• Refer to configuration diagrams GROUP-

TECHNICAL DESCRIPTION (COMMENT)

The power supply circuit or the communication circuit
to the sunroof motor assembly or the sunroof motor
assembly may be defective.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have

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

• The sunroof motor assembly may be defective

• The ETACS-ECU may be defective

AC305015

AC305015AF

FUSIBLE LINK (5)

54DB061A

C-212

C-215

C-205

JUNCTION BLOCK

(FRONT VIEW)

CONNECTORS: C-205, C-212, C-215

54DB002A

CONNECTOR: C-218

C-218 (GR)

HARNESS SIDE

48 47

50
59

51
60

53
62

54
63

67 66

54DB062A

CONNECTOR: D-04

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-88

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

STEP 1. Check sunroof motor assembly connector D-04
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is sunroof motor assembly connector D-04 in good

condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The system should communicate with the

sunroof-ECU normally.

STEP 2. Check the fusible link (5) line of power supply
circuit to the sunroof motor assembly. Measure the voltage
at sunroof motor assembly connector D-04.
(1) Disconnect sunroof motor assembly connector D-04 and

measure the voltage available at the wiring harness side of
the connector.

(2) Measure the voltage between terminal 1 and ground.

• The voltage should measure approximately 12 volts

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 4.
NO : Go to Step 3.

54DB063A

CONNECTOR: D-04

HARNESS SIDE

54DB063A

CONNECTOR: D-04

HARNESS SIDE

AC209365FG

CONNECTOR D-04
(HARNESS SIDE)

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