Mitsubishi Montero (2004+). Manual — part 1012
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-47
STEP 14. Check the following harness wires.
• The wire between HBB connector B-18 (terminal 31) and
motor relay A connector B-53X (terminal 4)
AC204626 AB
CONNECTOR: B-18
B-18 (B)
HARNESS CONNECTOR :
COMPONENT SIDE
34
32
31
33
35
B-18
AC204551
3 2 1
5 4
1 2 3
4 5
RELAY BOX CONNECTOR
AC
CONNECTOR: B-53X
B-53X
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-48
• The wire between HBB connector B-17 (terminal 2) and
motor relay B connector B-54X (terminal 5)
Q: Is any harness wire damaged?
YES : Repair or replace the faulty harness wire and then go
to Step 25.
NO : Go to Step 15.
AC204629 AE
CONNECTOR: B-17
B-17 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
1
2
3
4
5
6
7
8
B-17
AC204551
3 2 1
5 4
1 2 3
4 5
RELAY BOX CONNECTOR
AD
CONNECTOR: B-54X
B-54X
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-49
STEP 15. Check the following connectors.
• M-ASTC-ECU connectors E-119 and E-120
Check connectors, for loose, corroded or damaged terminals,
or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES : Go to Step 16.
NO : Repair the faulty connector or terminal. Then go to
Step 25.
AC203901
AC204627 AD
CONNECTORS: E-119, E-120
E-119
M-ASTC-ECU CONNECTORS
E-119
E-120
E-120
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-50
STEP 16. Check the ignition switch (IG2) circuit at
M-ASTC-ECU harness connector E-120.
(1) Disconnect M-ASTC-ECU connector E-120.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 48 and ground. The
voltage should measure approximately 12 volts (battery
positive voltage).
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 17.
NO : Go to Step 18.
AC203901
AC204627AE
CONNECTOR: E-120
M-ASTC-ECU CONNECTOR
E-120
E-120
AC204729 AB
HARNESS CONNECTOR:
COMPONENT SIDE
E-120
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