Mitsubishi Grandis. Manual - part 8

DIAGNOSIS CODE CHART

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-29

DIAGNOSIS CODE CHART

M1549000700320

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.

Diagnosis code No.

Diagnostic item

Reference page

01

Trouble in SWS communication line system or 
ETACS-ECU

 

P.54B-30

02

Communication error with column switch

 

P.54B-32

03

Communication error with front-ECU

 

P.54B-39

04

*1

Communication error with sunroof-ECU

 

P.54B-46

05

Communication error with power window main switch

 

P.54B-56

10

Bus off

 

P.54B-67

11

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

 

P.54B-68

12

*2

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

 

P.54B-69

13

A/C-ECU time-out

 

P.54B-70

14

Meter time-out

 

P.54B-72

15

*3

Centre display unit time-out

−

21

Meter failure information

 

P.54B-73

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-30

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) NOT USING SWS MONITOR

54B-31

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?

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 : 

Replace the ETACS-ECU.

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) NOT USING SWS MONITOR

54B-32

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.

FUSIBLE
LINK

26

IGNITION
SWITCH (IG1)

RELAY
BOX

COLUMN
SWITCH

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

COLUMN-ECU

ETACS-ECU

DIAGNOSIS
CONNECTOR

FRONT SIDE

Column Switch Power Supply and SWS Communication Circuit <LHD>