Mitsubishi 380. Manual - part 343

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-40

STEP 6. Measure the power supply voltage at stoplamp 
switch connector C-30 by backprobing.
(1) Disconnect stoplamp switch connector C-30.

(2) Measure the power supply voltage between stoplamp 

switch connector C-30 terminal 2 and ground.

(3) Reconnect stoplamp switch connector C-30.

Q: Is the measured voltage battery positive voltage 

(approximately 12 volts)?
YES : Go to Step 10.
NO :  Go to Step 7.

STEP 7. Check stoplamp switch connector C-30 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 8.
NO :  Repair or replace the damaged components. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 22.

17DB045A

CONNECTOR: C-30

C-30

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

AC305712AB

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

17DB045A

CONNECTOR: C-30

C-30

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-41

STEP 8. Check the harness wire between stoplamp switch 
connector C-30 terminal 2 and fuse number 11 at the relay 
box at engine compartment for damage.
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO :  Repair the damaged harness wire. Then go to Step 

22.

STEP 9. Check the fuse number 11 at the relay box at 
engine compartment.
Q: Is the fuse in good condition?

YES : Go to Step 10.
NO :  Check the stoplamp system harness and replace the 

fuse. Then go to Step 22.

17DB045A

CONNECTOR: C-30

C-30

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

AC305713AB

BATTERY

RELAY BOX

FUSE NUMBER 11
(HOUSING COLOR:
BLUE)

AC305713AB

BATTERY

RELAY BOX

FUSE NUMBER 11
(HOUSING COLOR:
BLUE)

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-42

STEP 10. Check the stoplamp switch.
(1) Remove the stoplamp switch. (Refer to GROUP 35A, Brake 

Pedal 

P.35A-24

).

(2) Connect an ohmmeter to the stoplamp switch between 

terminals 1 and 2.

(3) Check for continuity between the terminals when the 

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

(4) The stoplamp switch is operating properly if the circuit is 

open between terminals 1 and 2 when the plunger is 
released, and if the resistance value is less than 2 ohms 
between terminals 1 and 2 when it is pushed in.

Q: Is the stoplamp switch operating properly?

YES : Install the stoplamp switch. (Refer to GROUP 35A, 

Brake Pedal 

P.35A-24

). Then go to Step 11.

NO :  Replace the stoplamp switch. (Refer to GROUP 35A, 

Brake Pedal 

P.35A-24

). Then go to Step 22.

STEP 11. Check stoplamp switch connector C-30 and joint 
connector (1) C-01 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 12.
NO :  Repair or replace the damaged components. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 22.

ACX02256AL

C-30 STOPLIGHT SWITCH
CONNECTOR

AC205057    

CONTINUITY

NO

CONTINUITY

4.0 mm (0.16 in)

AB

17DB043A

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

C-30

CONNECTOR:  C-30

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-43

STEP 12. Check the harness wire between stoplamp 
switch connector C-30 terminal 1 and Engine-ECU 
connector B-21 terminal 18 for damage.
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair the damaged harness wire. Then go to Step 

22.

17DB045A

CONNECTOR: C-30

C-30

C-30 HARNESS
CONNECTOR:
COMPONENT SIDE

10DB133A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER