Mitsubishi L200. Manual — part 228

ACB01742

23

FUSIBLE LINK

RELAY
BOX

STOP LAMP

STOP LAMP
SWITCH

ENGINE-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

Stop Lamp Switch System Circuit (Except EURO 5)

ACA01405

Connectors: C-10, C-114 <LH drive vehicles>

AB

C-10 (GR)

C-114

ACA01406

C-120 (L)

AB

C-10 (GR)

C-114

Connectors: C-10, C-114, C-120
<RH drive vehicles>

CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-16

ACA01401

C-103 (B)

Connector: C-103, C-105 <LH drive vehicles>

AD

C-105 (B)

ACA01402

Connector: C-105 <RH drive vehicles>

AC

C-105 (B)

CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-17

OPERATION

• For the stop lamp switch, two switches, a stop

lamp switch for the stop lamp illumination and a
brake switch exclusively for the cruise control
system, are incorporated to improve the reliabil-
ity.

• The engine-ECU connector C-103 terminal

No.125 and terminal No.126 monitor the state of
the stop lamp switch and brake switch.

• The stop lamp switch and brake switch turn ON/

OFF when the brake pedal is depressed/
released, and the input signal to the engine-ECU
changes. According to this change, the engine-
ECU judges the state of the stop lamp switch and
the brake switch.

DIAGNOSIS CODE SET CONDITIONS

Check Condition

• The cruise control indicator lamp illuminates.

Judgement Criteria

• Open/short in stop lamp switch circuit.

• Open circuit in the brake switch circuit (between

engine-ECU connector C-103 terminal No.126
and earth).

PROBABLE CAUSES

• Damaged harness or connector.

• Malfunction of the stop lamp switch.

• Malfunction of the engine-ECU.

DIAGNOSIS PROCEDURE

STEP 1. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 135: Stop lamp switch

Q: Is the check result normal?

YES :

Go to Step 14.

NO :

Go to Step 2.

STEP 2. Check the stop lamp operation.
Check the stop lamp operation.

OK:

Brake pedal depressed: Stop lamp will illumi-

nate.

Brake pedal not depressed: Stop lamp does

not illuminate.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Go to Step 6.

STEP 3. Connectors check: C-103 engine-ECU
connector, C-10 J/C (9) and C-53 <LHD> or C-35
<RHD> intermediate connector.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair or replace the damaged connector.
Then go to Step 22.

STEP 4. Check the harness wire between engine-
ECU connector C-103 terminal No.125 and C-10
J/C (9) terminal No.6 <LHD>, or between engine-
ECU connector C-103 terminal No.125 and C-10
J/C (9) terminal No.2 <RHD>.

• Check harness wire for open/short circuit and

damage.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair or replace the damaged harness
wire. Then go to Step 22.

STEP 5. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 135: Stop lamp switch

Q: Is the check result normal?

YES :

Go to Step 14.

NO :

Replace the engine-ECU (Refer to GROUP
13A

− Engine-ECU ). Then go to Step 22.

CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-18

STEP 6. Measure the terminal voltage at stop
lamp switch connector C-114.
(1) Disconnect stop lamp switch connector C-114

and measure at the harness side connector.

(2) Measure the terminal voltage between stop lamp

switch harness C-114 terminal No.2 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Go to Step 7.

STEP 7. Connectors check: C-114 stop lamp
switch connector and C-54 <LHD> or C-14
<RHD> intermediate connector.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair or replace the damaged connector.
Then go to Step 22.

STEP 8. Check the harness wire between fuse
No.12 at the relay box in engine compartment
and stop lamp switch connector C-114 terminal
No.2.

• Check harness wire for open/short circuit and

damage.

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair or replace the damaged harness
wire. Then go to Step 22.

STEP 9. Check the fuse No.12 at the relay box in
engine compartment.

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Check the stop lamp system harness and
replace the fuse. Then go to Step 22.

STEP 10. Connectors check: C-114 stop lamp
switch connector and C-10 J/C (9).

Q: Is the check result normal?

YES :

Go to Step 11.

NO :

Repair or replace the damaged connector.
Then go to Step 22.

STEP 11. Check the harness wire between stop
lamp switch connector C-114 terminal No.1 and
C-10 J/C (9) terminal No.7.

• Check harness wire for open/short circuit and

damage.

Q: Is the check result normal?

YES :

Go to Step 12.

NO :

Repair or replace the damaged harness
wire. Then go to Step 22.

STEP 12. Check the stop lamp switch.
Refer to GROUP 35A

− Brake Pedal, Inspection,

Stop Lamp Switch Check .

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Replace the stop lamp switch (Refer to
GROUP 35A

− Brake Pedal ). Then go to

Step 22.

STEP 13. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 135: Stop lamp switch

Q: Is the check result normal?

YES :

Go to Step 14.

NO :

Replace the engine-ECU (Refer to GROUP
13A

− Engine-ECU ). Then go to Step 22.

STEP 14. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 134: Brake switch

Q: Is the check result normal?

YES :

Go to Step 21.

NO :

Go to Step 15.

STEP 15. Connectors check: C-103 engine-ECU
connector <EURO 5>, C-105 engine-ECU
connector <Except EURO 5>, C-53 <LHD> or C-35
<RHD> intermediate connector and C-114 stop
lamp switch connector.

Q: Is the check result normal?

YES :

Go to Step 16.

NO :

Repair or replace the damaged connector.
Then go to Step 22.

STEP 16. Check the harness wire between
engine-ECU connector C-103 terminal No.126
<EURO 5>, engine-ECU connector C-105 terminal
No.7 <Except EURO 5> and stop lamp switch
connector C-114 terminal No.3.

• Check harness wire for open/short circuit and

damage.

Q: Is the check result normal?

YES :

Go to Step 17.

NO :

Repair or replace the damaged harness
wire. Then go to Step 22.

CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-19

STEP 17. Connectors check: C-114 stop lamp
switch connector and C-120 J/C (1) <RHD>.

Q: Is the check result normal?

YES :

Go to Step 18.

NO :

Repair or replace the damaged connector.
Then go to Step 22.

STEP 18. Check the harness wire between stop
lamp switch connector C-114 terminal No.4 and
earth.

• Check harness wire for open/short circuit and

damage.

Q: Is the check result normal?

YES :

Go to Step 19.

NO :

Repair or replace the damaged harness
wire. Then go to Step 22.

STEP 19. Check the stop lamp switch.
Refer to GROUP 35A

− Brake Pedal, Inspection,

Stop Lamp Switch Check .

Q: Is the check result normal?

YES :

Go to Step 20.

NO :

Replace the stop lamp switch (Refer to
GROUP 35A

− Brake Pedal ). Then go to

Step 22.

STEP 20. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 134: Brake switch

Q: Is the check result normal?

YES :

Go to Step 21.

NO :

Replace the engine-ECU (Refer to GROUP
13A

− Engine-ECU ). Then go to Step 22.

STEP 21. Read the diagnosis code.
(1) Use the M.U.T.-III, erase the diagnosis code of

the cruise control system (Refer to

P.17-9

).

(2) Turn the ignition switch to the "ON" position, and

push the "ON/OFF" switch to turn the cruise
control system to ON (turn ON the cruise control
indicator lamp).

(3) With the cruise control switches not operated,

depress the brake pedal for several seconds, and
then use the M.U.T.-III to read the diagnosis code
of the cruise control system (Refer to

P.17-9

).

Q: Is diagnosis code No.P1571 set?

YES :

Replace the engine-ECU (Refer to GROUP

13A

− Engine-ECU ). Then go to Step 22.

NO :

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
Malfunction ).

STEP 22. Check the data list.
Using M.U.T.-III, check the data list (Refer to

P.17-29

− data list reference table).

• Item 134: Brake switch

• Item 135: Stop lamp switch

Q: Is the check result normal?

YES :

Go to Step 23.

NO :

Return to Step 1.

STEP 23. Read the diagnosis code.
(1) Use the M.U.T.-III, erase the diagnosis code of

the cruise control system (Refer to

P.17-9

).

(2) Turn the ignition switch to the "ON" position, and

push the "ON/OFF" switch to turn the cruise
control system to ON (turn ON the cruise control
indicator lamp).

(3) With the cruise control switches not operated,

depress the brake pedal for several seconds, and
then use the M.U.T.-III to read the diagnosis code
of the cruise control system (Refer to

P.17-9

).

Q: Is diagnosis code No.P1571 set?

YES :

Return to Step 1.

NO :

The procedure is complete.