Mitsubishi Montero (2004+). Manual — part 1008
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-31
STEP 8. Check the following harness wires.
• The wire between HBB connector B-17 (terminal 4) and
M-ASTC-ECU connector E-119 (terminal 25)
• The wire between HBB connector B-17 (terminal 6) and
M-ASTC-ECU connector E-119 (terminal 12)
• The wire between HBB connector B-17 (terminal 8) and
M-ASTC-ECU connector E-119 (terminal 14)
Q: Is any harness wire damaged?
YES : Repair it and then go to Step 10.
NO : Go to Step 9.
STEP 9. Recheck for diagnostic trouble code.
(1) Erase the DTC memory.
(2) Recheck for diagnostic trouble code.
Q: Is DTC 53 set?
YES : Replace the M-ASTC-ECU (Refer to GROUP 35C,
M-ASTC-ECU
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
.
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
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-32
STEP 10. Recheck for diagnostic trouble code.
(1) Erase the DTC memory.
(2) Recheck for diagnostic trouble code.
Q: Is DTC 53 set?
YES : Start over at Step 1.
NO : The procedure is complete.
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-33
DTC 54: Motor Relay (Open Circuit, Short Circuit or Failure of the Motor Relay Coil)
AC204495AB
Motor Relay Circuit
HYDRAULIC BRAKE BOOSTER (HBB) DIAGNOSIS
TSB Revision
BASIC BRAKE SYSTEM
35A-34
.
CIRCUIT OPERATION
• The motor relay A and the motor relay B are con-
trolled by the M-ASTC-ECU.
• If the brake fluid pressure in the hydraulic brake
booster (HBB) becomes low, the M-ASTC-ECU
outputs the motor relay actuating signal to the
motor relay A and the motor relay B and then the
pump motor operates.
• The M-ASTC-ECU monitors the pump motor (at
25 terminal).
.
HBB DTC SET CONDITION
DTC 54 is set if the motor relay circuit is open or
short, the motor relay A or the motor relay B is defec-
tive, or the internal circuit of the M-ASTC-ECU is
defective.
.
TROUBLESHOOTING HINTS
• Malfunction of the motor relay A or the motor
relay B
• Damaged wiring harness or connector
• Malfunction of the M-ASTC-ECU
.
DIAGNOSIS
Required Special Tool:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
• MB991223: Harness Set
AC204545 AC
CONNECTORS: B-17, B-18
B-17 (GR)
B-18 (B)
AC204329 AC
CONNECTORS: B-53X, B-54X
B-53X
B-54X
AC204688 AB
CONNECTOR: D-116
D-116
AC204547AB
CONNECTORS: D-208, D-212
D-208
D-212
JUNCTION BLOCK
(FRONT VIEW)
AC204548 AB
CONNECTOR: E-111
E-111
AC203901AD
CONNECTORS: E-119, E-120
E-119
E-120
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст