Mitsubishi Outlander GS45X. Manual - part 1257

TROUBLESHOOTING

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LOCAL INTERCONNECT NETWORK (LIN)

54B-21

STEP 4. Check the battery power supply circuit to the 
column switch. Measure the voltage at column switch 
connector C-212.
(1) Disconnect column switch connector C-212 measure the 

voltage available at the wiring harness side of the 
connector.

(2) Measure the voltage between column switch connector 

C-212 terminal 4 and ground.

• The voltage should measure approximately 12 volts 

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Check the wiring harness between ETACS-ECU 
connector C-317 (terminal 10) and column switch 
connector C-212 (terminal 1).

• Check the power supply line (battery supply) for open circuit 

and short circuit.

Q: Is the wiring harness between ETACS-ECU connector 

C-317 (terminal 10) and column switch connector C-212 
(terminal 1) in good condition?
YES : No action is necessary and testing is complete.
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 6. Check the wiring harness between ETACS-ECU 
connector C-301 (terminal 1) and column switch connector 
C-212 (terminal 3).

• Check the communication line for open circuit.

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 7.
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. Go to Step 7.

AC702831CZ

Connector C-212
(Harness side)

TROUBLESHOOTING

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STEP 7. Recheck for diagnostic trouble code.
Check again if the DTC is set to the ETACS-ECU.

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) Ensure that the ignition switch is at the "LOCK" (OFF) 

position.

(2) Start up the personal computer.
(3) Connect special tool MB991827 to special tool MB991824 

and the personal computer.

(4) Connect special tool MB991910 to special tool MB991824.
(5) Connect special tool MB991910 to the data link connector.
(6) Erase the DTC.
(7) Turn the ignition switch to the "ON" position.
(8) Check if the DTC is set.
(9) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the lighting 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

).

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

TROUBLESHOOTING

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Code No.U1006 Theft-alarm siren LIN timeout <Vehicles with theft-alarm sensor>

CAUTION

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

THEFT- 
ALARM
SIREN

LIN
CUTOFF
CONTROL
UNIT

Theft-Alarm Siren LIN Communication Circuit

INTERFACE
CIRCUIT

LIN DRIVE
CIRCUIT

ETACS-
ECU

FUSE     

8

TROUBLESHOOTING

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.

TROUBLE JUDGMENT

The ETACS-ECU receives signal from the  
theft-alarm siren. If signal cannot be received at all, 
DTC U1006 will be set.

.

TECHNICAL DESCRIPTION (COMMENT)

Current trouble

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

lines between the theft-alarm siren and the 
ETACS-ECU, the power supply system of the 
power window main switch, or the theft-alarm 
siren itself may be defective.

Past trouble

• If DTC U1006 is stored as a past trouble, carry 

out diagnosis with particular emphasis on wiring 
and connector(s) in the LIN bus line between the 
theft-alarm siren and the ETACS-ECU, and the 
power supply system of the theft-alarm siren. For 
diagnosis procedures, refer to GROUP 00, How 
to Use Troubleshooting/Inspection Service Points 
− How to Treat Past Trouble 

P.00-17

.

.

TROUBLESHOOTING HINTS

• The theft-alarm siren may be defective.

• The LIN cutoff control unit may be defective.

• The wiring harness or connectors may have 

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

DIAGNOSIS PROCEDURE

STEP 1. Check ETACS-ECU connectors C-301, C-304, 
C-312 and C-317, LIN cutoff control unit connector C-40, 
theft-alarm siren connector A-62 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are ETACS-ECU connectors C-301, C-304, C-312 and 

C-317, LIN cutoff control unit connector C-40, 
theft-alarm siren connector A-62 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s). Go to 

Step 12.

AC901112

Connectors: A-03, A-62

A-03 (B)

AX

A-62 (B)

AC901075BB

Connectors: C-34, C-40

C-34 (BR)

C-40

ACA02655AR

Connectors: C-301, C-304, C-312, C-317

C-304

C-312

C-317

C-301