Mitsubishi Galant. Manual — part 368

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-42

STEP 5. Check the ground circuit voltage at auto-cruise
control-ECU connector C-52 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-52.
(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 14 and ground by

backprobing.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the voltage approximately 0.5 volts or less?

YES : Go to Step 8.
NO : Go to Step 6.

STEP 6. Check auto-cruise control-ECU connector C-52.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that the malfunction is eliminated.

NO : Go to Step 7.

STEP 7. Check the harness wire between auto-cruise
control-ECU connector C-52 and ground.
Q: Is any harness wire between auto-cruise control-ECU

connector C-52 and ground damaged?
YES : Repair the harness wire and then check that the

malfunction is eliminated.

NO : Check that the malfunction is eliminated.

If the malfunction is eliminated, replace the auto-
cruise control-ECU. (Refer to

P.17-74

.)

Then check that the malfunction is eliminated.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01903

C-52 CONNECTOR
HARNESS SIDE VIEW

AD

AC004572AB

CONNECTOR: C-52

AC004572AB

CONNECTOR: C-52

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-43

STEP 8. Check the output circuit voltage at data link
connector C-23.
(1) Turn the ignition switch to "ON" position.
(2) Measure the voltage between terminal 13 and ground.
(3) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the voltage approximately 4 volts or more?

YES : Check that the malfunction is eliminated.

If the malfunction is eliminated, replace the auto-
cruise control-ECU. (Refer to

P.17-74

.)

Then check that the malfunction is eliminated.

NO : Go to Step 9.

STEP 9. Check data link connector C-23.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that the malfunction is eliminated.

NO : Go to Step 10.

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9 10 11 12 13 14 15 16

ACX01921AD

DATA LINK
CONNECTOR: C-23

AC004591

CONNECTOR: C-23

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-44

STEP10. Check the output circuit voltage at auto-cruise
control-ECU connector C-52 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-52.
(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 11 and ground by

backprobing.

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the voltage approximately 4 volts or more?

YES : Go to Step 11.
NO : Go to Step 12.

STEP 11. Check the harness wire between auto-cruise
control-ECU connector C-52 and data link connector C-23.
Q: Is any harness wire between auto-cruise control-ECU

connector C-52 and data link connector C-23 damaged?
YES : Repair the harness wire and then check that the

malfunction is eliminated.

NO : Check that the malfunction is eliminated.

If the malfunction is eliminated, replace the auto-
cruise control-ECU. (Refer to

P.17-74

.)

Then check that the malfunction is eliminated.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01904

C-52 CONNECTOR
HARNESS SIDE VIEW

AD

AC004572AB

CONNECTOR: C-52

AC004591

CONNECTOR: C-23

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-45

STEP 12. Check auto-cruise control-ECU connector C-52.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that the malfunction is eliminated.

NO : Check that the malfunction is eliminated.

If the malfunction is eliminated, replace the auto-
cruise control-ECU. (Refer to

P.17-74

.)

Then check that the malfunction is eliminated.

AC004572AB

CONNECTOR: C-52