Mitsubishi Lancer (4A9 engine). Manual - part 238

SPECIAL TOOLS

LOCAL INTERCONNECT NETWORK (LIN)

54B-3

SPECIAL TOOLS

M1545100100163

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991955

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991825
f. MB991826

M.U.T.-III sub-
assembly

a. Vehicle 

Communication 
Interface (V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A 
(Vehicles with CAN 
communication 
system)

d. M.U.T.-III main 

harness B 
(Vehicles without 
CAN 
communication 
system)

e. M.U.T.-III measure 

adapter

f. M.U.T.-III trigger 

harness

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send 
simulated vehicle speed. If you 
connect M.U.T.-III main harness 
B instead, the CAN 
communication does not 
function correctly.
LIN communication line check 
(service data and diagnosis 
codes)

TROUBLESHOOTING

DIAGNOSIS CODE CHART

M1545100200739

CAUTION

Diagnosis 
code No.

Diagnostic item

Reference 
page

U0169

Sunroof LIN timeout <Vehicles with sunroof>

U0215

P/W SW (DR) LIN timeout

U0231

Lighting control sensor LIN timeout <Vehicles with auto lamp>

U1006

Security alarm siren LIN timeout <Vehicles with security alarm sensor>

TROUBLESHOOTING

LOCAL INTERCONNECT NETWORK (LIN)

54B-4

DIAGNOSIS FUNCTION

M1545104200076

HOW TO READ DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

HOW TO ERASE DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

U1007

Security alarm sensor LIN timeout <Vehicles with security alarm sensor>

U1109

Column SW LIN timeout

U150B

Column SW checksum error

U150C

P/W SW (DR) checksum error

U1511

Sunroof checksum error <Vehicles with sunroof>

U1512

Lighting control sensor checksum error <Vehicles with auto lamp>

U1514

Bit error (LIN)

U1515

No-Bus activity error (LIN)

U1539

Security alarm siren LIN checksum error <Vehicles with security alarm 
sensor>

U1540

Security alarm SNSR.LIN checksum error <Vehicles with security alarm 
sensor>

Diagnosis 
code No.

Diagnostic item

Reference 
page

TROUBLESHOOTING

LOCAL INTERCONNECT NETWORK (LIN)

54B-5

DIAGNOSIS CODE PROCEDURES

Code No.U0169 Sunroof LIN timeout <Vehicles with sunroof>

CAUTION

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

Sunroof Motor Assembly LIN Communication Circuit

ETACS-
ECU

INTERFACE 
CIRCUIT

LIN DRIVE 
CIRCUIT

INPUT CIRCUIT

SUNROOF 
MOTOR 
ASSEMBLY

FUSE     

15

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

ACA00886

AC

Connector: C-316 <LHD>
ETACS-ECU

ACA00887

AC

Connector: C-316 <RHD>
ETACS-ECU

AC612722

AL

Connector: D-06

D-06 (GR)

TROUBLESHOOTING

LOCAL INTERCONNECT NETWORK (LIN)

54B-6

JUDGEMENT CRITERIA
The ETACS-ECU will set diagnosis code No. U0169 
when no signals are received from the sunroof motor 
assembly.

PROBABLE CAUSES

• Faulty sunroof motor assembly

• Malfunction of the LIN bus

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-316 ETACS-ECU 
connector, D-06 sunroof motor assembly 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

STEP 2. Resistance measurement at the D-06 
sunroof motor assembly connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the D-06 

sunroof motor assembly connector terminal No. 2 
and the body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Wiring harness check from D-06 sunroof 
motor assembly connector terminal No. 2 to 
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 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

NO : 

Repair the wiring harness.

STEP 4. Voltage measurement at the D-06 
sunroof motor assembly connector.
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between the D-06 sunroof 

motor assembly connector terminal No. 6 and the 
body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

STEP 5. Wiring harness check between the D-06 
sunroof motor assembly connector terminal No. 
6 and the C-316 ETACS-ECU connector terminal 
No. 2
Check the power supply line for open circuit and 
short circuit.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

NO : 

Repair the wiring harness.

STEP 6. Check the wiring harness wires between 
C-316 ETACS-ECU connector terminal No. 1 and 
D-06 sunroof motor assembly connector terminal 
No. 7.
Check the communication lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

STEP 7. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set to the 
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the LOCK (OFF) 

position to the ON position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the sunroof motor assembly.

NO : 

A poor connection, open circuit, or other 
intermittent malfunctions in the LIN bus lines 
between the sunroof motor assembly and 
the ETACS-ECU (Refer to GROUP 00 

− 

How to Cope with Intermittent Malfunction ).