Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 387

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-67

INSPECTION PROCEDURE 8: Auto-cruise Control Indicator Light inside Combination Meter does not
Illuminate. (However, Auto-cruise Control is Normal.)

AC005117

Auto-cruise Control Indicator Light Drive Circuit

AB

AC001451

CONNECTOR: C-20

AB

AC003552 AI

CONNECTORS: C-41, C-43

C-41

C-43

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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CIRCUIT OPERATION
The power for the auto-cruise indicator in the
combination meter is supplied from the ignition
switch (IG1).
When the auto-cruise control system is operating,
the transistor inside the auto-cruise control-ECU
illuminates the auto-cruise indicator through ECU
terminal number 15.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably the malfunction of the
indicator bulb or the malfunction of the connector or
harness.

TROUBLESHOOTING HINTS

•

Malfunction of the indicator bulb.

•

Damaged harness or connector.

•

Malfunction of the auto-cruise control-ECU.

DIAGNOSIS

Required Special Tool:

•

MB991223: Harness Set

STEP 1. Check the auto-cruise control indicator bulb.
(1) Remove the combination meter.

Refer to GROUP54A, Combination Meter Assembly and
Vehicle Speed Sensor

P.54A-66

.

(2) Check the auto-cruise control indicator bulb.

Q: Is the bulb blown?

YES : Replace the bulb.

Then check that the malfunction is eliminated.

NO : Go to Step 2.

AC001995 AP

CONNECTORS: C-101, C-104

C-104

C-101

JUNCTION BLOCK
(FRONT VIEW)

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 2. Check the output circuit voltage at auto-cruise
control-ECU connector C-20 by backprobing.
(1) Do not disconnect auto-cruise control switch connector C-

20.

(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 15 and ground by

backprobing.

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

Q: Is the voltage approximately battery positive voltage?

YES : Check that the malfunction is eliminated.

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

P.17-81

.)

Then check that the malfunction is eliminated.

NO : Go to Step 3.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

AC002355

C-20 CONNECTOR
HARNESS SIDE VIEW

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AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 3. Check the output circuit voltage at junction block
connector C-104 by backprobing.
(1) Do not disconnect auto-cruise control switch connector C-

104.

(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 6 and ground by

backprobing.

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

Q: Is the voltage approximately battery positive voltage?

YES : Go to Step 5.
NO : Go to Step 4.

STEP 4. Check junction block connector C-104.
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 : Replace the junction block.

Then check that the malfunction is eliminated.

AC002391

1 2 3 4

5 6 7 8 9

10 1112 1314 15 16 1718 19 20

C-104 CONNECTOR
HARNESS SIDE VIEW

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AC001995 AW

CONNECTOR: C-104

JUNCTION BLOCK
(FRONT VIEW)