Mitsubishi Grandis. Manual — part 142

DIAGNOSIS CODE CHART

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-30

SWITCHES WHICH ARE APPLICABLE TO
INPUT SIGNAL CHECK, AND THEIR
CHECK CONDITIONS

MUT-III DRIVE RECORDER FUNCTION

M1549026000064

1. The SWS monitor cartridge memory can store the

ECU check results, the service data, the
communication data obtained by the function
diagnosis. This communication data can be
displayed as a chart or graphical form.

2. If data obtained by the drive recorder function has

to be stored for long time, the data can be
transferred to the SWS monitor cartridge. By
doing this, you can disconnect the MUT-III to
prevent excessive battery drain.
NOTE: For the details about the MUT-III drive
recorder function, refer to MUT-III User’s Manual.

DIAGNOSIS CODE CHART

M1549000700364

NOTE:

.

•

*1

: For vehicles without sunroof, diagnosis code No.4 does not mean that there is a problem.

•

*2

: For M/T-vehicles, diagnosis code No.12 does not mean that there is a problem.

•

*3

: Diagnosis code No.15 does not mean that there is a problem.

Input signal

Requirements for sounding buzzer

Inhibitor switch ("R" position)

When the ignition switch is turned ON and
the selector lever is moved to the R position.

Diagnosis code No.

Diagnostic item

Reference page

01

Trouble in SWS communication line system or
ETACS-ECU

P.54C-31

02

Communication error with column switch

P.54C-33

03

Communication error with front-ECU

P.54C-34

04

*1

Communication error with sunroof-ECU

P.54C-35

05

Communication error with power window main switch

P.54C-36

10

Bus off

P.54C-37

11

Engine-A/T-ECU time-out (related to engine)

P.54C-37

12

*2

Engine-A/T-ECU time-out (related to A/T)

P.54C-39

13

A/C-ECU time-out

P.54C-40

14

Meter time-out

P.54C-41

15

*3

Centre display unit time-out

−

21

Meter failure information

P.54C-42

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-31

DIAGNOSTIC TROUBLE CODE PROCEDURES

Diagnosis code No.01 Trouble in SWS communication line system or ETACS-ECU

CAUTION

If diagnosis code No.01 is set in the ETACS-ECU,
diagnose the CAN bus lines.

ETACS-ECU

COLUMN
SWITCH

FRONT-ECU

SUNROOF
MOTOR
ASSEMBLY

POWER
WINDOW
MAIN SWITCH

COLUMN-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

CPU

CPU

SWS Communication Line <LHD>

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-32

TROUBLE JUDGMENT

The ETACS-ECU communicates with the column
switch, the front-ECU, the sunroof motor assembly
and the power window main switch through the SWS
communication line. If there is any trouble in the
ETACS-ECU or the SWS communication lines,
diagnosis code No.01 will be set.

COMMENT ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the ETACS-ECU
may be defective.

POSSIBLE CAUSES

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54D

− Diagnosis

P.54D-16

).

Step 2. Check whether the diagnosis code is
reset.

Check again if the diagnosis code is set.
(1) Ignition switch: LOCK (OFF) position to ON
(2) Erase the diagnosis code.
(3) On completion, check that the diagnosis code is

not reset.

Q: Is the check result normal?

ETACS-ECU

COLUMN
SWITCH

FRONT-ECU

POWER
WINDOW
MAIN SWITCH

SUNROOF
MOTOR
ASSEMBLY

CPU

CPU

COLUMN-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

SWS Communication Line <RHD>

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-33

YES :

If a trouble is solved, it is determined that

there is an intermittent malfunction such as
poor engaged connector(s) or open circuit
(Refer to GROUP 00

− How to use

troubleshooting/Inspection Service Points

P.00-5

).

NO :

Go to Step 3.

Step 3. ECU check by using the SWS monitor

Check that the SWS communication lines are in
good condition.

• Ignition switch: ON

ECUS TO BE CHECKED

• Column ECU

• ETACS ECU

• Front ECU

• P/W MODULE

• Sunroof-ECU

OK: "OK" are displayed for all the items

Q: Are the check result normal?

Normal conditions are displayed for all the items. :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

P.00-5

).

"NG" is displayed on the "COLUMN ECU" menu. :

Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible

P.54C-56

."

"NG" is displayed on the "ETACS ECU" menu. :

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

P.54C-63

."

"NG" is displayed on the "FRONT ECU" menu. :

Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible

P.54C-70

."

"NG" is displayed on the "P/W MODULE" menu. :

Refer to Inspection Procedure A-5
"Communication with the power window
main switch (power window module) is not
possible

P.54C-77

."

"NG" is displayed on the "Sunroof ECU" menu. :

Refer to Inspection Procedure A-6
"Communication with the sunroof motor
assembly (sunroof-ECU) is not possible

P.54C-90

."

Diagnosis code No.02 Communication error with column switch

CAUTION

If diagnosis code No.02 is set in the ETACS-ECU,
diagnose the CAN bus lines.

TROUBLE JUDGMENT

The ETACS-ECU communicates with the column
switch through the SWS communication lines. If
there is any trouble in that communication, diagnosis
code No.02 will be set.

COMMENT ON TROUBLE SYMPTOM

The column switch, the ETACS-ECU, connector(s),
or wiring harness between the two may be defective.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54D

− Diagnosis

P.54D-16

).

Step 2.Check whether the diagnosis code is
reset.

Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is

not reset.

Q: Is the check result normal?