Mitsubishi Evolution X. Manual - part 1155

TROUBLESHOOTING

TSB Revision

LOCAL INTERCONNECT NETWORK (LIN)

54B-13

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

STEP 1. Check ETACS-ECU connector C-316 and lighting 
control sensor connector D-02 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are ETACS-ECU connector C-316 and lighting control 

sensor connector D-02 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s).

STEP 2. Check the wiring harness between ETACS-ECU 
connector C-316 (terminal 1) and lighting control sensor 
connector D-02 (terminal 3).
Q: Is the wiring harness between ETACS-ECU connector 

C-316 (terminal 1) and lighting control sensor connector 
D-02 (terminal 3) in good condition?
YES : Go to Step 3.
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.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54B-4

."

(2) Erase the DTC.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the lighting control sensor.
NO :  A poor connection, open circuit or other intermittent 

malfunction is present in the LIN bus lines between 
the lighting control sensor and the ETACS-ECU 
(Refer to GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

TROUBLESHOOTING

TSB Revision

LOCAL INTERCONNECT NETWORK (LIN)

54B-14

DTC U1109: Column SW LIN timeout

CAUTION

Before replacing the ECU, ensure that the communication circuit is normal.

Column Switch LIN Communication Circuit

ETACS-
ECU

INTERFACE
CIRCUIT

LIN DRIVE
CIRCUIT

COLUMN
SWITCH

JOINT
CONNECTOR (2)

COLUMN-ECU

AC708950

Connector: C-102

BQ

C-102 (B)

AC708953AG

Connector: C-212

AC708972AY

Connector: C-301

ETACS-ECU

.

TROUBLESHOOTING

TSB Revision

LOCAL INTERCONNECT NETWORK (LIN)

54B-15

TROUBLE JUDGMENT

The ETACS-ECU receives signal from the column 
switch. If signal cannot be received at all, DTC 
U1109 will be set.

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

• Connector(s) or wiring harness in the LIN bus 

lines between the column switch and the 
ETACS-ECU, the power supply system of the col-
umn switch, or the column switch itself may be 
defective.

Past trouble

• If DTC U1109 is stored as a past trouble, carry 

out diagnosis with particular emphasis on wiring 
and connector(s) in the LIN bus line between the 
column switch and the ETACS-ECU, and the 
power supply system of the column switch.

.

TROUBLESHOOTING HINTS

• The column switch may be defective.

• The wiring harness or connectors may have 

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

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicles Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

STEP 1. Check ETACS-ECU connector C-301 and column 
switch connector C-212 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are ETACS-ECU connector C-301 and column switch 

connector C-212 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s).

STEP 2. Check the wiring harness between ETACS-ECU 
connector C-301 (terminal 1) and column switch connector 
C-212 (terminal 3).
NOTE: Also check joint connector C-102 for loose, corroded, or 
damaged terminals, or terminals pushed back in the connector. 
If joint connector C-102 is damaged, repair or replace the con-
nector as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector 

C-301 (terminal 1) and column switch connector C-212 
(terminal 3) in good condition?
YES : Go to Step 3.
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.

TROUBLESHOOTING

TSB Revision

LOCAL INTERCONNECT NETWORK (LIN)

54B-16

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.54B-4

."

(2) Erase the DTC.
(3) Turn the ignition switch to the "ON" position.
(4) Check if the DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the column switch.
NO :  A poor connection, open circuit or other intermittent 

malfunction is present in the LIN bus lines between 
the column switch and the ETACS-ECU (Refer to 
GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

DTC U150B: Column SW checksum error

.

TROUBLE JUDGMENT

The ETACS-ECU will set DTC U150B when abnor-
mal signals are received from the column switch (col-
umn-ECU).

.

TROUBLESHOOTING HINTS

• The column switch (lighting switch) may be 

defective.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicles Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)