Mitsubishi Galant. Manual — part 369

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-46

INSPECTION PROCEDURE 2: When the Brake Pedal is Depressed, Auto-cruise Control is not
Cancelled.

AC004594 AB

Stoplight Switch Circuit

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-47

CIRCUIT OPERATION
This is the stoplight switch input signal circuit.
The signal is sent to the stoplight switch from multi-
purpose fuse 3, and is then sent to the auto-cruise
control-ECU.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a malfunction of the stoplight
switch circuit.

TROUBLESHOOTING HINTS

•

Malfunction of the stoplight switch.

•

Damaged harness or connector.

•

Malfunction of the auto-cruise control-ECU.

DIAGNOSIS

Required Special Tool:

•

MB991223: Harness Set

STEP 1. Check if the stoplight illuminates.

Q: Is the stoplight illuminated?

YES : Go to Step 9.
NO : Go to Step 2.

AC004581

CONNECTOR: C-03

AB

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

AC004595AB

CONNECTOR: C-85

JUNCTION BLOCK(REAR VIEW)

AC004572AB

CONNECTOR: C-52

AC004593AB

CONNECTOR: C-77

JUNCTION BLOCK
(FRONT VIEW)

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-48

STEP 2. Check the 12-Volt supply circuit voltage at
stoplight switch connector C-03.
(1) Disconnect stoplight switch connector C-03 and measure at

the harness side.

(2) Measure the voltage between terminal 2 and ground.

Q: Is the voltage approximately battery positive voltage?

YES : Go to Step 6.
NO : Go to Step 3.

STEP 3. Check stoplight switch connector C-03.
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 4.

1

2

3

4

ACX01922AC

STOPLIGHT SWITCH
CONNECTOR: C-03

AC004581

CONNECTOR: C-03

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-49

STEP 4. Check intermediate connector C-66 and junction
connector C-85 and C-77.
Q: Is any connectors 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 5.

STEP 5. Check the harness wire between fusible link No.1
and stoplight switch connector C-03.
Q: Is any harness wire between fusible link No.1 and

stoplight switch connector C-03 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.

AC004580AB

CONNECTOR: C-66

CONNECTOR
BLOCK(LH)

AC004593AB

CONNECTOR: C-77

JUNCTION BLOCK
(FRONT VIEW)

AC004595AB

CONNECTOR: C-85

JUNCTION BLOCK(REAR VIEW)

AC004581

CONNECTOR: C-03

AB