Mitsubishi Outlander (2003+). Manual - part 188

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-47

STEP 19. Connector check: C-141 
engine-A/T-ECU connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 20.

NO : 

Repair the defective connector.

STEP 20. Replace the output shaft speed sensor 
and then recheck the diagnosis code.
(1) Replace the output shaft speed sensor.
(2) Test drive the vehicle.
(3) Check if the diagnosis code is set.

Q: Is diagnosis code 23 set?

YES : 

Go to Step 21.

NO : 

The inspection is complete.

STEP 21. Check the transfer drive gear and 
driven gear.

Visually check the transfer drive gear and driven 
gear for damage.

Q: Is the check result normal?

YES : 

Eliminate the cause of the noise.

NO : 

Replace the transfer drive gear and driven 
gear.

AC309479 AE

Connector: C-141 <LHD>

Connector: C-141 <RHD>

Engine-A/T-ECU

Harness side

Engine-A/T-ECU

C-141 (GR)

C-141 (GR)

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-48

Code No.26: Stop lamp switch system

OPERATION
The stop lamp switch judges whether the brake 
pedal is depressed or released, and sends the 
information to the engine-A/T-ECU.

diagnosis code set conditions
If the stop lamp remains on for consecutively five 
minutes or more while the vehicle is being driven or 
all the stop lamp bulbs are blown, it is judged that 
there is a short or open circuit in the stop lamp switch 
and diagnosis code 26 is set.

Possible causes

•

Malfunction of brake pedal

•

Malfunction of stop lamp switch

•

Damaged harness wires and connectors

•

Malfunction of the engine-A/T-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 : Gray  
R : Red     P : Pink     V : Violet       

BATTERY

RELAY
BOX

STOP LAMP
SWITCH

ENGINE-
A/T-ECU

AC309565AB

Stop lamp switch system circuit

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-49

DIAGNOSIS

STEP 1. Check that the stop lamps illuminate and 
extinguish normally.

The stop lamps should illuminate when the brake 
pedal is depressed, and extinguish when released.

Q: Is the check result normal??

YES : 

Go to Step 7.

NO : 

Go to Step 2.

STEP 2. Check the brake pedal height.

Refer to GROUP 35A 

−

 On-vehicle Service, Brake 

Pedal Check and Adjustment. (Refer to 

P.35A-4

.)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Adjust the brake pedal height.

STEP 3. Check the stop lamp switch.

Refer to GROUP 35A 

−

 Brake Pedal and Stop Lamp 

Switch Continuity Check. (Refer to 

P.35A-14

.)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the stop lamp switch.

STEP 4. MUT-II/lll data list

Item 26: Stop lamp switch (Refer to data list 
reference table 

P.23A-133

.)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

−

 How to Cope with Intermittent 

Malfunction 

P.00-6

.)

NO : 

Go to Step 5.

STEP 5. Connector check: C-101 stop lamp 
switch connector

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. Measure the voltage at stop lamp switch 
connector C-101.

Disconnect the connector, and measure the voltage 
between terminal No.2 and earth at the harness side.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 12.

STEP 7. Measure the voltage at engine-A/T-ECU 
connector C-140.
(1) Connect stop lamp switch connector C-101.

(2) Measure the voltage between engine-A/T-ECU 

connector C-140 terminal No.39 and earth.

OK:

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

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 10.

AC309520

Connector: C-101

Harness side

Brake pedal

AB

4

3

2

1

AC309520

Connector: C-101

Harness side

Brake pedal

AB

4

3

2

1

AC309479AD

Connector: C-140 <LHD>

Connector: C-140 <RHD>

Engine-A/T-ECU

Harness side

Engine-A/T-ECU

C-140 (GR)

C-140 (GR)

45

52

35

42 41

43

51

58

50

57

33

34

36

40393837

47

55

48

56

44

49

46

54

3231

53

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-50

STEP 8. Connector check: C-140 engine-A/T-ECU 
connector

Check for the contact with terminals.

Q: Is the check result normal??

YES : 

Go to Step 9.

NO : 

Repair the defective connector.

STEP 9. MUT-II/lll data list

Item 26: Stop lamp switch (Refer to data list 
reference table 

P.23A-133

.)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

−

 How to Cope with Intermittent 

Malfunction 

P.00-6

.)

NO : 

Replace the engine-A/T-ECU.

AC309479AD

Connector: C-140 <LHD>

Connector: C-140 <RHD>

Engine-A/T-ECU

Harness side

Engine-A/T-ECU

C-140 (GR)

C-140 (GR)

45

52

35

42 41

43

51

58

50

57

33

34

36

40393837

47

55

48

56

44

49

46

54

3231

53