Mitsubishi Galant 9G. Manual — part 137

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-544

STEP 2. Check the battery line of 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) Measure the voltage between terminal 20 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 4.
NO : Go to Step 3.

STEP 3. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 20) and battery.

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC209836

2019 18 1716 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

AE

CONNECTOR C-219
(JUNCTION BLOCK SIDE)

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

INPUT SIGNAL PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-545

NOTE: Also check junction block connector C-214 and joint
connector C-01 for loose, corroded, or damaged terminals, or
terminals pushed back in the connector. If junction block con-
nector C-214 or joint connector C-01 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 ETACS-ECU connector

C-219 (terminal 20) and 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. If the
functions or equipment described in "CIRCUIT
OPERATION" work normally, the interior light loaded
signal should be normal.

STEP 4. 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 : Go to Step 6.
NO : Go to Step 5.

AC305231

CONNECTOR: C-01

BO

AC305415

C-214

CONNECTOR: C-214

AU

JUNCTION BLOCK
(FRONT VIEW)

HARNESS SIDE

10

1

6

14

5

12

13

4

11

7

2

3

8

9

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-546

STEP 5. 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

P.00E-2

.

Q: Is the wiring harness between ETACS-ECU connector

C-219 (terminal 8) and the 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 or equipment described in "CIRCUIT
OPERATION" work normally, the interior light loaded
signal 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-547

STEP 6. Check the ignition switch (ACC) 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 "ACC" position.

(3) Measure the voltage between terminal 18 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 or

equipment described in "CIRCUIT OPERATION" work
normally, the interior light loaded signal should be
normal.

NO : Go to Step 7.

STEP 7. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 18) and the ignition switch
(ACC).

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC209365FE

CONNECTOR: C-219
(JUNCTION BLOCK SIDE)

AC305413 AG

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)