Mitsubishi Montero (2004+). Manual - part 406

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-31

STEP 4. Check stoplight switch connector D-123 for 
looser, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 5.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 5. Measure the stoplight switch power supply 
voltage at connector D-123 by backprobing.
(1) Do not disconnect connector D-123.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 3 and ground by 

backprobing.

• When the brake pedal is depressed, voltage should 

measure battery positive voltage.

• When the brake pedal is not depressed, voltage should 

measure less than 1 volt.

Q: Does the voltage measure the battery positive voltage 

when the brake pedal is depressed, and measure one 
volt or less when the pedal is released?
YES : Go to Step 8.
NO :   Go to Step 6.

1

2

3

4

AC204682AB

CONNECTOR: D-123

D-123 

1

2

3

4

AC204682AB

CONNECTOR: D-123

D-123 

2

1

3

4

AC205055AB

D-123 HARNESS 
CONNECTOR:
HARNESS SIDE

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-32

STEP 6. Check stoplight switch connector D-123, 
intermediate connector D-125, intermediate connector 
E-110 and PCM connector D-133 for looser, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

1

2

3

4

AC204682AB

CONNECTOR: D-123

D-123 

AC205043

CONNECTOR: D-125

D-125 

AB

AC205045

6

1

7

2

9

8

10

3

5

12

11

4

1314

E-110

CONNECTOR: E-110

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-33

Q: Are the connectors and terminals in good condition?

YES : Go to Step 7.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC205046

CONNECTOR: D-133

D-133(GR)

PCM

AB

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-34

STEP 7. Check the harness for an open circuit or damage 
between stoplight switch connector D-123 terminal 3 and 
PCM connector D-133 terminal 54.
Q: Is the harness wire in good condition?

YES : Go to Step 8.
NO :  Repair or replace the harness wire.

1

2

3

4

AC204682AB

CONNECTOR: D-123

D-123 

AC205046

CONNECTOR: D-133

D-133(GR)

PCM

AB