Mitsubishi Galant (2004+). Manual — part 325
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-491
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check ETACS-ECU connector C-219 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-219 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
ignition switch (IG1) should be normal.
STEP 2. Check the ignition switch (IG1) line of the power
supply circuit to the ETACS-ECU. Measure the voltage at
ETACS-ECU connector C-219.
(1) Disconnect ETACS-ECU connector C-219 and measure the
voltage available at the junction block side of the connector.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 8 and ground.
• The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Replace the ETACS-ECU. If the functions described
in "CIRCUIT OPERATION" work normally, the input
signal from the ignition switch (IG1) should be normal.
NO : Go to Step 3.
AC305413 AG
CONNECTOR: C-219
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(REAR VIEW)
AC305413 AG
CONNECTOR: C-219
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(REAR VIEW)
AC209799
2019 18 1716 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
AB
CONNECTOR C-219
(JUNCTION BLOCK SIDE)
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-492
STEP 3. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 8) and the ignition switch (IG1).
NOTE: Also check junction block connector C-215 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-215 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection
Q: Is the wiring harness between ETACS-ECU connector
C-219 (terminal 8) and ignition switch (IG1) 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 ignition switch
(IG1) should be normal.
AC305413 AG
CONNECTOR: C-219
JUNCTION BLOCK SIDE
JUNCTION BLOCK
(REAR VIEW)
AC305415
HARNESS SIDE
JUNCTION BLOCK
(FRONT VIEW)
CONNECTOR: C-215
AV
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-493
INSPECTION PROCEDURE M-3: ETACS-ECU does not receive any signal from the fog light switch.
.
CIRCUIT OPERATION
The ETACS-ECU operates the fog lights according to
signal from the fog light switch.
.
TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the fog lights do not work
normally. If the signal is not normal, the fog light
switch or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
• The fog light 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
FOG LIGHT
SWITCH
ETACS-ECU
Fog Light Switch Input Circuit
AC305231
CONNECTOR: C-128
BB
AC305413AL
CONNECTOR: C-218
C-218 (GR)
INPUT SIGNAL PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-494
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check fog light switch connector C-128 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is fog light switch connector C-128 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Repair the fog light switch. If the fog light
switch operates normally, a correct signal is sent from
the fog light switch.
STEP 2. Check the fog light switch.
Remove the fog light switch. Refer to GROUP 54A, Fog light
. Then check continuity between the switch termi-
nals.
Q: Is the fog light switch in good condition?
YES : Go to Step 3.
NO : Repair the fog light switch. If the fog light switch
operates normally, a correct signal is sent from the
fog light switch.
AC305231
AC305231
HARNESS SIDE
CONNECTOR: C-128
BS
SWITCH
POSITION
TESTER
CONNECTION
SPECIFIED
CONDITION
Released
1
− 2
Open circuit
Pressed
1
− 2
Less than 2 ohms
AC205430
AB
6
5
3
2
4
1
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