Mitsubishi Grandis. Manual - part 795

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-21

Code No.22 Stop Lamp Switch System <L.H. drive vehicles>

OPERATION

• Battery positive voltage is supplied to the stop 

lamp switch (terminal 2 and 4).

• When the brake pedal is depressed, battery 

positive voltage is applied to the engine-ECU 
<M/T> or engine-A/T-ECU <A/T> (terminal 39 
and 54).

Stop lamp 
switch

B-P

W

W

B-P

L-O

L-O

L-O

V-Y

B

B

V-Y

C-111

C-17

J/C (7)

C-32

C-18

C-125

C-127

26

FUSIBLE
LINK

Engine-ECU <M/T> or 
engine-A/T-ECU <A/T>

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

Stoplight Switch System Circuit <L.H. drive vehicles>

AC311812

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-22

DIAGNOSIS CODE SET CONDITIONS

Check Condition

• The "CRUISE" indicator light illuminates.

Judgement Criteria

• Short in stop lamp switch circuit.

• Open circuit in the brake switch circuit (between 

engine-ECU <M/T> or engine-A/T-ECU <A/T> 
terminal 54 and earth).

POSSIBLE CAUSES

• Malfunction of the stop lamp switch.

• Damaged harness or connector.

• Malfunction of the engine-ECU <M/T>.

• Malfunction of the engine-A/T-ECU <A/T>.

DIAGNOSIS

STEP 1. MUT-III data list

Item 05: Stop lamp switch (Refer to data list 
reference table 

P.17-50

).

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 

illuminate

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. Measure the voltage at engine-ECU 
connector C-111 <M/T> or engine-A/T-ECU 
connector C-111 <A/T>.
(1) Turn the ignition switch to the "ON" position.

(2) Measure the voltage between engine-ECU 

connector C-111 <M/T> terminal No.39 or 
engine-A/T-ECU connector C-111 <A/T> terminal 
No.39 and earth.

OK:

Brake pedal depressed: System voltage
Brake pedal not depressed: 1 V or less

(3) Turn the ignition switch to the "LOCK" (OFF) 

position.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Go to Step 4.

AC311908AB

Connector: C-111

C-111 (GR)

AC304645AE

C-111 harness 
connector: 
harness side

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-23

STEP 4. Connectors check: C-111 engine-ECU 
connector <M/T> or C-111 engine-A/T-ECU 
connector <A/T>,  intermediate connector C-18 
and C-32 J/C (7)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the damaged 
components. Then go to Step 23.

STEP 5. Check the harness between engine-ECU 
connector C-111 <M/T> terminal No.39 or 
engine-A/T-ECU connector C-111 <A/T> terminal 
No.39 and stop lamp switch connector C-127 
terminal No.1.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the damaged harness wire. Then go 
to Step 23.

AC311908AB

Connector: C-111

C-111 (GR)

AC311913AC

Connector: C-32

C-32

AC311914

C-18

Connector: C-18

AB

AC311908AB

Connector: C-111

C-111 (GR)

AC311913AD

Connector: C-127

C-127

AUTO-CRUISE CONTROL

ENGINE AND EMISSION CONTROL

17-24

STEP 6. Measure the voltage at stop lamp switch 
connector C-127.

(1) Disconnect stop lamp switch connector C-127.

(2) Measure the voltage between stop lamp switch 

connector C-127 terminal No.2 and earth.

OK: System voltage

(3) Connect stop lamp switch connector C-127.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 7.

STEP 7. Connectors check: C-127 stop lamp 
switch connector, C-125 intermediate connector

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair or replace the damaged 
components. Then go to Step 23.

AC311913AD

Connector: C-127

C-127

AC305712AE

C-127 harness 
connector: 
component side

AC311913AD

Connector: C-127

C-127

AC311913AB

Connector: C-125

C-125