Mitsubishi Grandis. Manual — part 9

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-33

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

).

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 <RHD>

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-34

Step 2. Use the MUT-III to confirm a diagnosis
code. (MUT-III diagnosis code)
(1) Ignition switch: ON
(2) On completion, check that diagnosis code No.02

is not reset.

Q: Is diagnosis code No.02 set?

YES :

Go to Step 6.

NO :

Go to Step 3.

Step 3. Connector check: C-301 column switch
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

Step 4. Voltage measurement at C-301 column
switch connector.

(1) Remove the column switch, and measure at the

wiring harness side.

(2) Voltage between C-301 column switch connector

terminal No.1 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Replace the column switch.

NO :

Go to Step 5.

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side

AC310507BO

Connector C-301
(Harness side)

10

5

6

7

9 8

3

4

2 1

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-35

Step 5. Check the wiring harness between C-301
column switch connector terminal No.1 and the
fusible link (26).

NOTE:

Prior to the wiring harness inspection, check
intermediate connector C-205 <LH drive vehicles>,
C-125 <RH drive vehicles> and joint connector C-32
<LH drive vehicles>, C-31 <RH drive vehicles> and
repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side

AC310613

AG

Connector: C-32 <LHD>

AC310623

Connector: C-205 <LHD>

AU

Junction block (Front view)

AC310631AL

Connector: C-31 <RHD>

AC310628AB

Connector: C-125 <RHD>

DIAGNOSTIC TROUBLE CODE PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-36

Step 6. Resistance measurement at the C-301
column switch connector.

(1) Remove the column switch, and measure at the

wiring harness side.

(2) Resistance between C-301 column switch

connector terminal No.4 and body earth

OK: 2

Ω or less

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Go to Step 7.

Step 7. Check the wiring harness between C-301
column switch connector terminal No.4 and the
body earth.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side

AC310506 BD

Connector C-301
(Harness side)

10

5

6

7

9 8

3

4

2 1

AC310153AB

Connector: C-301 <LHD>

Harness side

AC310183

AB

Connector: C-301 <RHD>

Harness side