Mitsubishi Galant (2004+). Manual - part 261

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-235

STEP 10. Check the battery power supply circuit to the 
horn relay. Measure the voltage at horn relay connector 
A-06X.

(1) Disconnect horn relay connector A-06X and measure the 

voltage available at the relay box side of the connector.

(2) Measure the voltage between terminal 1 and ground, and 

also between terminal 2 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 12.
NO :  Go to Step 11.

STEP 11. Check the wiring harness between horn relay 
connector A-06X (terminals 1 and 2) and the battery.

Q: Is the wiring harness between horn relay connector 

A-06X (terminals 1 and 2) and the battery 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. Verify that 
the horn sounds normally.

STEP 12. Check ETACS-ECU connector C-217 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.

Q: Is ETACS-ECU connector C-217 in good condition?

YES : Go to Step 13.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the horn sounds normally.

AC305992

RELAY BOX SIDE

CONNECTOR: A-06X

AC

FRONT OF VEHICLE

AC209365EL

CONNECTOR A-06X
(RELAY BOX SIDE)

AC305992

RELAY BOX SIDE

CONNECTOR: A-06X

AC

FRONT OF VEHICLE

AC305413

C-217

CONNECTOR: C-217

AE

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

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STEP 13. Check the wiring harness between horn relay 
connector A-06X (terminal 3) and ETACS-ECU connector 
C-217 (terminal 44).

NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the 
connector. If intermediate connector C-29 is damaged, repair or 
replace the damaged component(s) as described in GROUP 
00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between horn relay connector 

A-06X (terminal 3) and ETACS-ECU connector C-217 
(terminal 44) in good condition?
YES : Go to Step 14.
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. Verify that 
the horn sounds normally.

AC305992

RELAY BOX SIDE

CONNECTOR: A-06X

AC

FRONT OF VEHICLE

AC305413

C-217

CONNECTOR: C-217

AE

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

AC305231AI

CONNECTOR: C-29

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

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STEP 14. Check the wiring harness between horn relay 
connector A-06X (terminal 4) and horn connector A-36 
(terminal 1).

Q: Is the wiring harness between horn relay connector 

A-06X (terminal 4) and horn connector A-36 (terminal 1) 
in good condition?
YES : Replace the ETACS-ECU. Verify that the horn sounds 

normally.

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. Verify that 
the horn sounds normally.

AC305992

RELAY BOX SIDE

CONNECTOR: A-06X

AC

FRONT OF VEHICLE

AC305206

CONNECTOR: A-36

AE

A-36 (B)

HARNESS SIDE

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

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INSPECTION PROCEDURE E-3: Keyless Entry System: Encrypted code cannot be registered.

.

CIRCUIT OPERATION
The ETACS-ECU operates the encrypted code regis-
ter mode according to the following signals:

• Key reminder switch

• Hazard warning light switch

.

TECHNICAL DESCRIPTION (COMMENT)
If the encrypted code register mode cannot be set, 
the input circuits from the switches described in 
"CIRCUIT OPERATION" or the ETACS-ECU may be 
defective.

If the encrypted code register mode can be set but 
the transmitter cannot be registered, the transmitter 
or the ETACS-ECU may be defective.

.

TROUBLESHOOTING HINTS

• The key reminder switch may be defective

• The hazard warning light switch may be defective

• The transmitter may be defective

• The ETACS-ECU 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:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Verify trouble symptom.
Q: Can the encrypted code register mode be set?

YES : Go to Step 3.
NO :  Go to Step 2.

ETACS-
ECU

· KEY REMINDER SWITCH
· HAZARD WARNING LIGHT SWITCH

Encrypted Tranmitter Code Register Mode