Mitsubishi Montero (2004+). Manual - part 1017

 

  Index      Mitsubishi     Mitsubishi Montero - service repair manual 2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1015  1016  1017  1018   ..

 

 

Mitsubishi Montero (2004+). Manual - part 1017

 

 

HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS

TSB Revision

BASIC BRAKE SYSTEM

35A-67

STEP 8. Check the pressure switch (for pump motor 
control) circuit at M-ASTC-ECU harness connector E-119.

(1) Disconnect M-ASTC-ECU connector E-119 and measure at 

the harness connector (component side).

(2) Measure the resistance between terminal 11 and ground.

The resistance should not measure less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Go to Step 9.
NO :  Go to Step 12.

AC203901

AC204627 AB

CONNECTOR: E-119

E-119

M-ASTC-ECU CONNECTOR

E-119

AC204683AB

HARNESS CONNECTOR: 
COMPONENT SIDE

E-119

HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS

TSB Revision

BASIC BRAKE SYSTEM

35A-68

STEP 9. Check the following harness wire.

• The wire between HBB connector B-18 (terminal 35) and 

M-ASTC-ECU connector E-119 (terminal 11)

Q: Is the harness wire damaged?

YES : Repair or replace it and then go to Step 15.
NO :  Go to Step 10.

AC204626 AB

CONNECTOR: B-18

B-18 (B)

HARNESS CONNECTOR : 
COMPONENT SIDE

34

32

31

33

35

B-18

AC203901

AC204627AC

CONNECTOR: E-119

E-119

HARNESS CONNECTOR: 
COMPONENT SIDE

E-119

HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS

TSB Revision

BASIC BRAKE SYSTEM

35A-69

STEP 10. Check the pressure switch (for pump motor 
control).

(1) Depress the pedal repeatedly more than 40 times until the 

pedal depressing force feels heavy with the ignition switch 
at the "LOCK" (OFF) position to release the pressure of 
HBB power supply system.

(2) Disconnect HBB connector B-18.

(3) Measure the resistance between the terminals 33 and 35 at 

the HBB. The resistance should measure approximately 1 
kilo ohms. 

Q: Is the resistance approximately 1 kilo ohms?

YES : Go to Step 11.
NO :  Replace the master cylinder and hydraulic unit 

assembly (Refer to 

P.35A-140

). Then go to Step 15.

STEP 11. Check the pump motor operation.
Q: Does the pump motor operate?

YES : Go to Step 14.
NO :  Go to Step 12.

STEP 12. Recheck for diagnostic trouble code.
(1) Erase the DTC memory.
(2) Recheck for diagnostic trouble code.
Q: Is DTC 55 reset?

YES : Go to Step 13.
NO :  The procedure is complete.

AC204629 AD

CONNECTOR: B-18

B-18 (B)

HBB CONNECTOR

B-18

AC204685

HBB 
CONNECTOR

B-18

AB

HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS

TSB Revision

BASIC BRAKE SYSTEM

35A-70

STEP 13. Check the following harness wire.

• The wire between HBB connector B-17 (terminal 4) and 

M-ASTC-ECU connector E-119 (terminal 25)

Q: Is the harness wire damaged?

YES : Repair or replace it and then go to Step 15.
NO :  Go to Step 14.

STEP 14. Recheck for diagnostic trouble code.
(1) Erase the DTC memory.
(2) Recheck for diagnostic trouble code.
Q: Is DTC 55 set?

YES : Replace the M-ASTC-ECU (Refer to GROUP 35C, 

M-ASTC-ECU 

P.35C-213

). Then go to Step 15.

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 

P.00-6

.

AC204629 AE

CONNECTOR: B-17

B-17 (GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

1

2

3

4

5

6

7

8

B-17

AC203901

AC204627AC

CONNECTOR: E-119

E-119

HARNESS CONNECTOR: 
COMPONENT SIDE

E-119

 

 

 

 

 

 

 

Content   ..  1015  1016  1017  1018   ..