Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 376

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-23

STEP 7. Check auto-cruise control vacuum pump
connector A-01 and intermediate connector C-06.
Q: Is any connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 14 is not
output.

NO : Check the harness wire between stoplight switch

connector C-03 and auto-cruise control vacuum pump
connector A-01 for open circuit or damage.
Then repair if necessary.
Then check that diagnostic trouble code 14 is not
output.

STEP 8. Check the output circuit voltage at auto-cruise
control-ECU connector C-20 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-20.
(2) Turn the ignition switch to "ON" position and the auto-cruise

control main switch to "ON" position.

(3) Measure the voltage between terminal 7 and ground by

backprobing.

•

Voltage should be battery positive voltage.
[When decelerating with the "SET" switch while driving
at constant speed (Release valve open).]

(4) Measure the voltage between terminal 8 and ground by

backprobing.

•

Voltage should be battery positive voltage.
[When decelerating with the "SET" switch while driving
at constant speed. (Control valve open).]

(5) Measure the voltage between terminal 16 and ground by

backprobing.

•

Voltage should be battery positive voltage.
(When the motor is stopped during a constant road
speed.)

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

Q: Are all of the above values satisfied?

YES : Check that diagnostic trouble code 14 is not output.

If diagnostic trouble code 14 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-81

.)

Then check that diagnostic trouble code 14 is not.

NO : Go to Step 9.

AC001449

CONNECTOR: A-01

RESERVE
TANK

AB

AC003552 AB

CONNECTOR: C-06

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01897

C-20 CONNECTOR
HARNESS SIDE VIEW

AF

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-24

STEP 9. Check auto-cruise control-ECU connector C-20
and intermediate connector C-94.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 14 is not
output.

NO : Go to Step 10.

STEP 10. Check auto-cruise control vacuum pump
connector A-01.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

Then check that diagnostic trouble code 14 is not
output.

NO : Go to Step 11.

AC001451

CONNECTOR: C-20

AB

AC001992

CONNECTOR: C-94

AF

CONNECTOR
BLOCK (RH)

AC001449

CONNECTOR: A-01

RESERVE
TANK

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-25

STEP 11. Check the auto-cruise vacuum pump.
(1) Disconnect the vacuum hose from the auto-cruise vacuum

pump and connect a vacuum gauge to the vacuum pump.

(2) Disconnect the vacuum pump connector.
(3) Check the auto-cruise vacuum pump and valves according

to the following procedure:

•

Connect the positive battery terminal to auto-cruise
vacuum pump connector terminal 1, and the negative
battery terminal to terminals 2, 3, and 4.
The vacuum gauge should read 27 kPa (8.0 in Hg) or
more.

•

The vacuum should be maintained when terminal 4 is
disconnected from the negative battery terminal while
terminals 1, 2, and 3 remain connected.
Then the vacuum gauge should read 0 kPa (0 in Hg)
when terminal 2 is disconnected from the negative
battery terminal while terminals 1, and 3 remain
connected.

•

The vacuum should be maintained when terminal 4 is
disconnected from the negative battery terminal while
terminals 1, 2, and 3 remain connected.
Then the vacuum gauge should read 0 kPa (0 in Hg)
when terminal 3 is disconnected from the negative
battery terminal while terminals 1, and 2 remain
connected.

Q: Are all of the above values satisfied?

YES : Go to Step 12.
NO : Replace the auto-cruise vacuum pump. (Refer to

P.17-81

.)

Then check that diagnostic trouble code 14 is not
output.

ACX01181AB

VACUUM
GAUGE

CONTROL
VALVE

RELEASE
VALVE

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-26

STEP 12. Check the harness wire between auto-cruise
control vacuum pump connector A-01 and auto-cruise
control-ECU connector C-20.
Q: Is any harness wire between auto-cruise control

vacuum pump connector A-01 and auto-cruise control-
ECU connector C-20 damaged?
YES : Repair harness wire and then check that diagnostic

trouble code 14 is not output.

NO : Check that diagnostic trouble code 14 is not output.

If diagnostic trouble code 14 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-81

.)

Then check that diagnostic trouble code 14 is not
output.

STEP 13. Check the output circuit voltage at auto-cruise
control-ECU connector C-20 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-20.
(2) Turn the ignition switch to "ON" position and the auto-cruise

control main switch to "ON" position.

(3) Measure the voltage between terminal 5 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 14.
NO : Go to Step 15.

AC001449

CONNECTOR: A-01

RESERVE
TANK

AB

AC001451

CONNECTOR: C-20

AB

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01899

C-20 CONNECTOR
HARNESS SIDE VIEW

AE