Mitsubishi 380. Manual — part 337

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-16

STEP 1. Using diagnostic tool , check data list item 78:
Clutch Switch.

CAUTION

To prevent damage to diagnostic tool , always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set diagnostic tool to the data reading mode for item 78,

Clutch Switch.

• When the clutch pedal is depressed the display on diag-

nostic tool should read "ON".

• When the clutch pedal is released the display on diag-

nostic tool should read "OFF".

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

Q: Is the switch operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunctions

00-14

.

NO : Then go to Step 2.

STEP 2. Check the clutch pedal adjustment and switch
operation.
Refer to GROUP 21A, Clutch - On-vehicle Service - Clutch
Pedal Check and Adjustment

P.21A-2

Q: Is the pedal and switch adjustment correct?

YES : Go to Step 3.
NO : Adjust the pedal or replace the switch if damaged or

not operating correctly. Then go to Step 6.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-17

STEP 3. Measure the clutch switch power supply voltage
by backprobing the clutch switch connector C-07 (terminal
1).
(1) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Go to Step 5.
NO : Then go to Step 4.

STEP 4. Check harness connector C-07 at Clutch switch
for damage, loose or corroded terminals .

Q: Is the harness connector in good condition?

YES : Then go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

00E-2

. Then go to Step 6.

03DB247A

C-07 HARNESS

CONNECTOR

17DB052A

CONNECTOR: C-30

C-07

C-07 HARNESS

CONNECTOR

COMPONENT SIDE

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-18

STEP 4. Measure the power supply voltage at ENGINE-ECU
connector B-21 by using ENGINE-ECU check harness
special tool MB992044.
(1) Disconnect the all ENGINE-ECU connectors and connect

ENGINE-ECU check harness special tool MB992044
between the separated connectors.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 41 and ground.

• Voltage should be battery positive voltage.

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

Q: Is battery positive voltage (approximately 12 volts)

present?
YES : Repair or replace the open or damaged wiring circuit

between ENGINE-ECU connector B-21 and Clutch
switch connector C-07. Then go to Step 8.

NO : Check the connector B-21 for damage and ensure

check harness connection t ENGINE-ECU is correct.
If connection is correct and no power supply is
present at terminal 41 of ENGIN-ECU then replace it.
Then go to Step 7.

STEP 5. Measure the clutch switch power supply voltage
by backprobing the clutch switch connector C-07 (terminal
2).
(1) Measure the voltage between terminal No. 2 and ground by

backprobing. while depressing the clutch pedal.

• When pedal is not depressed an (open circuit) , voltage

should be battery positive voltage.

• When pedal is depressed an (closed circuit) , voltage

should be less than 1.0 volt.

Q: Is there battery voltage at terminal No. 2 when pedal is

depressed?
YES : Go to Step 6.
NO : Replace the Clutch switch. Refer to GROUP 21A,

Clutch - On-vehicle Service - Clutch Pedal Check and
Adjustment

P.21A-2

. Then go to Step 7.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

03DB248A

B-21 HARNESS

CONNECTOR

03DB249A

C-07 HARNESS

CONNECTOR

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-19

STEP 6. Measure the resistance between Clutch switch
connector C-07 (terminal No. 2) and earth.
(1) Measure the resitence between terminal No. 2 and ground.

• The resistance should measure less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 7.
NO : Repair harness wire or connection between Clutch

switch connector C-07 (terminal No. 2) and earth
because of open circuit. Then go to Step 7.

STEP 7. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle −

P.13A-13

.

(2) Read the diagnostic trouble code.

Q: Is DTC P0830 set?

YES : Retry the troubleshooting.
NO : The inspection is complete.

03DB250A

C-07 HARNESS

CONNECTOR

17DB052A

CONNECTOR: C-30

C-07

C-07 HARNESS

CONNECTOR

COMPONENT SIDE