Mitsubishi L200. Manual - part 809

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-47

DIAGNOSIS PROCEDURE

STEP 1. Check the following connectors.

AC509934

Connector: C-219 <LHD>

AD

C-219 (GR)

Harness side

Junction block

AC509945AB

Harness side

Connector: C-302 <LHD>

10

5

6

7

9 8

3

4

2 1

AC509946AB

Harness side

Connector: C-302 <RHD>

10

5

6

7

9 8

3

4

2 1

AC901129

Connector: D-11

AN

Harness side

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

AC509952

Connector: E-03

AT

Harness side

AC502334AD

Harness side

Connector: E-06

AC502333AD

Connector: E-13

Harness side

AC509954

Connector: E-26

AS

Harness side

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-48

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-49

Check the following connectors:

• C-219 ETACS-ECU connector

• C-302 column switch connector

• D-38 lighting control sensor connector

• E-03 power window main switch connector

• E-26 front power window sub switch connector

• E-13 rear power window sub switch (LH) connec-

tor

• E-06 rear power window sub switch (RH) connec-

tor

• D-11 rear panel power window-ECU connector

Q: Are all the connectors in good condition?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

STEP 2. Measure the voltage at the LIN bus lines.
Check the LIN bus lines for short to power supply.
(1) Disconnect all the ECU connectors which are 

connected to the LIN bus lines.

(2) Turn the ignition switch from "LOCK" (OFF) to 

"ON" position.

(3) Measure the voltage between C-302 column 

switch connector terminal No.3 and earth.

• The voltmeter needle does not swing.

NOTE: If the LIN bus lines are short to power 
supply, the voltmeter indicates a constant value.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the wiring harness.

STEP 3. Measure the resistance at the LIN bus 
lines.
Check the LIN bus lines for short to earth.
(1) Disconnect all the ECU connectors which are 

connected to the LIN bus lines.

(2) Measure the resistance value between C-302 

column switch connector terminal No.3 and earth.

• No continuity (1 kΩ or more)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the wiring harness.

STEP 4. Check the column switch.

AC509945AB

Harness side

Connector: C-302 <LHD>

10

5

6

7

9 8

3

4

2 1

AC509946AB

Harness side

Connector: C-302 <RHD>

10

5

6

7

9 8

3

4

2 1

Disconnect C-302 column switch connector, and 
recheck whether diagnosis code No. U1570 is set.
(1) Connect all the relevant ECUs, and disconnect 

C-302 column switch connector only.

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) to 

"ON" position.

(4) Check whether diagnosis code No. U1570 is set.

NOTE: If diagnosis code No. U1570 is not set, 
diagnosis code No. U1500 is set because the col-
umn switch is disconnected. This is normal.

(5) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is diagnosis code No. U1570 set?

YES : 

Reconnect the column switch connector, 

and go to Step 5.

NO : 

Replace the lighting switch.

DIAGNOSIS CODE PROCEDURES

LOCAL INTERCONNECT NETWORK (LIN)

54B-50

STEP 5. Check the lighting control sensor.

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

Disconnect D-38 lighting control sensor connector, 
and recheck whether diagnosis code No. U1570 is 
set.
(1) Connect all the relevant ECUs, and disconnect 

D-38 lighting control sensor connector only.

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) to 

"ON" position.

(4) Check whether diagnosis code No. U1570 is set.

NOTE: If diagnosis code No. U1570 is not set, 
diagnosis code No. U1504 is set because the 
lighting control sensor is disconnected. This is 
normal.

(5) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is diagnosis code No. U1570 set?

YES : 

Reconnect the lighting control sensor 

connector, and go to Step 6.

NO : 

Replace the lighting control sensor.

STEP 6. Check the power window main switch.

AC509952

Connector: E-03

AT

Harness side

Disconnect E-03 power window main switch connec-
tor, and recheck whether diagnosis code No. U1570 
is set.
(1) Connect all the relevant ECUs, and disconnect E-

03 power window main switch connector only.

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) to 

"ON" position.

(4) Check whether diagnosis code No. U1570 is set.

NOTE: If diagnosis code No. U1570 is not set, 
diagnosis code No. U1508 is set because the 
power window main switch is disconnected. This 
is normal.

(5) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is diagnosis code No. U1570 set?

YES : 

Reconnect the power window main switch 

connector, and go to Step 7.

NO : 

Replace the power window main switch.

STEP 7. Check the front power window sub 
switch.

AC509954

Connector: E-26

AS

Harness side

Disconnect E-26 front power window sub switch con-
nector, and recheck whether diagnosis code No. 
U1570 is set.
(1) Connect all the relevant ECUs, and disconnect E-

26 front power window sub switch connector only.

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) to 

"ON" position.