Mitsubishi Galant (2004+). Manual — part 332

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-519

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the functions or systems
described in "CIRCUIT OPERATION" do not work
normally.

.

TROUBLESHOOTING HINTS

• The key reminder switch may be defective

• The wiring harness or connectors may have

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

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check key reminder switch connector C-310 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.

Q: Is key reminder switch connector C-310 in good

condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. If the functions described in "CIRCUIT

OPERATION" work normally, the input signal from the
key reminder switch should be normal.

STEP 2. Check the key reminder switch.

Disconnect key reminder switch connector C-310. Then check
continuity between terminals.

Q: Is the key reminder switch in good condition?

YES : Go to Step 3.
NO : Replace the key reminder switch. If the functions

described in "CIRCUIT OPERATION" work normally,
the input signal from the key reminder switch should
be normal.

AC305235AF

CONNECTOR: C-310

HARNESS SIDE

IGNITION KEY

TESTER
CONNECTION

SPECIFIED
CONDITION

Removed

4

− 6

Open circuit

Inserted

4

− 6

Less than 2 ohms

AC305235AF

CONNECTOR: C-310

HARNESS SIDE

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-520

STEP 3. Check the ground circuit to the key reminder
switch. Measure the resistance at key reminder switch
connector C-310.

(1) Disconnect key reminder switch connector C-310 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 5.
NO : Go to Step 4.

STEP 4. Check the wiring harness between key reminder
switch connector C-310 (terminal 4) and ground.

Q: Is the wiring harness between key reminder switch

connector C-310 (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

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the key reminder
switch should be normal.

AC305235AF

CONNECTOR: C-310

HARNESS SIDE

AC209364GZ

CONNECTOR C-310
(HARNESS SIDE)

AC305235AF

CONNECTOR: C-310

HARNESS SIDE

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-521

STEP 5. 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 6.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. If the functions described in "CIRCUIT

OPERATION" work normally, the input signal from the
key reminder switch should be normal.

STEP 6. Check the wiring harness between key reminder
switch connector C-310 (terminal 6) and ETACS-ECU
connector C-217 (terminal 30).

Q: Is the wiring harness between key reminder switch

connector C-310 (terminal 6) and ETACS-ECU connector
C-217 (terminal 30) 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. If the
functions described in "CIRCUIT OPERATION" work
normally, the input signal from the key reminder
switch should be normal.

AC305413AH

CONNECTOR: C-217

HARNESS SIDE

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JUNCTION BLOCK

(REAR VIEW)

AC305413AH

CONNECTOR: C-217

HARNESS SIDE

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JUNCTION BLOCK

(REAR VIEW)

AC305235AF

CONNECTOR: C-310

HARNESS SIDE

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-522

STEP 7. Check for continuity between key reminder switch
connector C-310 terminal 4 and each of the other terminals
as well as terminal 6 and each of the other terminals.

(1) Disconnect key reminder switch connector C-310 and

measure the resistance available at the equipment side of
the connector.

(2) Check for continuity between key reminder switch

connector C-310 terminal 4 and each of the other terminals
as well as terminal 6 and each of the other terminals.

Q: Does continuity exist between the terminals?

NO : Replace the ETACS-ECU. If the functions described

in "CIRCUIT OPERATION" work normally, the input
signal from the key reminder switch should be normal.

YES : Replace the key reminder switch. If the functions

described in "CIRCUIT OPERATION" work normally,
the input signal from the key reminder switch should
be normal.

AC305235AF

CONNECTOR: C-310

HARNESS SIDE