Mitsubishi Galant. Manual — part 370

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-50

STEP 6. Check the stoplight switch.
(1) Disconnect harness connector C-03 at the stoplight switch.
(2) Connect an ohmmeter to the stoplight switch, and check

continuity when the plunger of the stoplight switch is
pushed in and when it is released.

(3) The stoplight switch is in good condition if the circuit is open

when the plunger is pushed in to a depth of within 4 mm
(0.2 inch) from the outer case edge surface, and if the
resistance value is less than 2 ohm when it is released.

(4) The check for continuity should be made at terminals 1 and

2 of the stoplight switch.

Q: Is the circuit open?

YES : Replace the stoplight switch.

Refer to GROUP 35A, Brake Pedal

P.35A-30

.

Then check that the malfunction is eliminated.

NO : Go to Step 7.

STEP 7. Check stoplight switch connector C-03 and
intermediate connector C-66.
Q: Is any 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 8.

AC001478

NO CONTINUITY CONTINUITY

4 mm (0.2 in)

AB

ACX02256AC

STOPLIGHT SWITCH
CONNECTOR: C-03

AC004581

CONNECTOR: C-03

AB

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-51

STEP 8. Check the harness wire between stoplight switch
connector C-03 and intermediate connector C-66.
Q: Is any harness wire between stoplight switch connector

C-03 and intermediate connector C-66 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.

STEP 9. 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 4 and ground by

backprobing.

•

Voltage should be battery positive volts.
(When brake pedal is depressed.)

•

Voltage should be 0.5 volts or less.
(When brake pedal is not depressed.)

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

Q: Is the voltage within specifications?

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 10.

AC004581

CONNECTOR: C-03

AB

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01905

C-52 CONNECTOR
HARNESS SIDE VIEW

AD

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-52

STEP 10. Check auto-cruise control-ECU connector C-52
and intermediate connector C-66.
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 11.

STEP 11. Check the harness wire between intermediate
connector C-66 and auto-cruise control-ECU connector C-
52.
Q: Is any harness wire between intermediate connector C-

66 and auto-cruise control-ECU connector C-52
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.

AC004572AB

CONNECTOR: C-52

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

AC004572AB

CONNECTOR: C-52

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-53

INSPECTION PROCEDURE 3: When the Selector Lever is Moved to "N" Range, Auto-cruise Control is
not Cancelled.

AC004596AB

Park/neutral Position Switch Circuit

AC004597

CONNECTOR: B-39

AB

AC004589

CONNECTOR: C-17

AB