Mitsubishi Galant (2004+). Manual - part 221

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-75

STEP 2. Check column switch connector C-309 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q: Is column switch connector C-309 in good condition?

YES : Go to Step 3.
NO : Repair or replace the damaged component(s). The

system should communicate with the column switch
(column-ECU) normally.

STEP 3. Check the power supply circuit to the column
switch. Measure the voltage at column switch connector
C-309.

(1) Disconnect column switch connector C-309 and measure

the voltage available at the wiring harness side of the

connector.

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

backprobing.

• 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 5.
NO : Go to Step 4.

STEP 4. Check the wiring harness between column switch
connector C-309 (terminal 1) and the battery.

AC305235

HARNESS SIDE

CONNECTOR: C-309

AC305235

HARNESS SIDE

CONNECTOR: C-309

AC209365FF

CONNECTOR C-309
(HARNESS SIDE)

AC305235

HARNESS SIDE

CONNECTOR: C-309

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-76

NOTE: Also check intermediate connector C-29 and joint con-
nector C-01 for loose, corroded, or damaged terminals, or ter-
minals pushed back in the connector. If intermediate connector
C-29 or joint connector C-01 is damaged, repair or replace the
connector as described in GROUP 00E, Harness Connector
Inspection

P.00E-2

Q: Is the wiring harness between column switch connector

C-309 (terminal 1) 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. The system
should communicate with the column switch
(column-ECU) normally.

STEP 5. Check the ground circuit to the column switch.
Measure the resistance at column switch connector C-309.

(1) Disconnect column switch connector C-309 and measure

the resistance available at the wiring harness side of the

connector.

(2) Measure the resistance value between terminal 4 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 7.
NO : Go to Step 6.

AC305232

CONNECTORS: C-01, C-29

C-01

C-29

C-01

C-29

AC305235

HARNESS SIDE

CONNECTOR: C-309

AC209364GX

CONNECTOR C-309
(HARNESS SIDE)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-77

STEP 6. Check the wiring harness between column switch
connector C-309 (terminal 4) and ground.

Q: Is the wiring harness between column switch connector

C-309 (terminal 4) and ground in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the

STEP 7. Check ETACS-ECU connector C-218 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q: Is ETACS-ECU connector C-218 in good condition?

YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The system should communicate with the

column switch (column-ECU) normally.

STEP 8. Check the wiring harness between column switch
connector C-309 (terminal 3) and ETACS-ECU connector

C-218 (terminal 59).

AC305235

HARNESS SIDE

CONNECTOR: C-309

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

AC305235

HARNESS SIDE

CONNECTOR: C-309

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-78

NOTE: Also check joint connector C-03 for loose, corroded, or
damaged terminals, or terminals pushed back in the connector.
If joint connector C-03 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 column switch connector

C-309 (terminal 3) and ETACS-ECU connector C-218
(terminal 59) in good condition?
YES : Go to Step 9.
NO : The wiring harness may be damaged or the

STEP 9. Check the wiring harness between column switch
connector C-309 (terminal 2) and ETACS-ECU connector
C-218 (terminal 68).

Q: Is the wiring harness between column switch connector

C-309 (terminal 2) and ETACS-ECU connector C-218
(terminal 68) in good condition?
YES : Go to Step 10.
NO : The wiring harness may be damaged or the

STEP 10. Replace the column switch.
(1) Replace the column switch.
(2) The system should communicate with the column switch

(column-ECU) normally.

Q: Can the system communicate with the column switch

(column-ECU)?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. The system should

communicate with the column switch (column-ECU)
normally.

AC305231BP

CONNECTOR: C-03

AC305413AN

CONNECTOR: C-218

JUNCTION BLOCK
(REAR VIEW)

C-218 (GR)

HARNESS SIDE

AC305235

HARNESS SIDE

CONNECTOR: C-309

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