SsangYong Musso. Manual - part 452

ANTILOCK BRAKE SYSTEM  4F-15

Description

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

Application

Front / left INLET Valve

Front / left OUTLET Valve

Front / right INLET Valve

Front / right OUTLET Valve

Rear / left INLET Valve (ABD)

Rear / left OUTLET Valve

Rear / Right INLET Valve

Defect Code

13

14

15

16

17

18

19

4F-16  ANTILOCK BRAKE SYSTEM

Description

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator.

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator

!

Check solenoid internal resistance of the prime(ASV)

valve and pilot valve(USV) : 8.04 - 9.04 

Ω

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU and hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator

!

Check solenoid internal resistance of the prime(ASV)

valve and pilot valve(USV) : 8.04 - 9.04 

Ω

!

Check each valve by using SCANNER's solenoid valve

overriding function.

!

Check connection of connector and terminals in the

ECU and hydraulic modulator.

!

Check terminals for open or short.

(When connector is removed)

!

Replace the hydraulic modulator

!

Check each valve by using SCANNER's pump motor

overriding function.

!

Check resistance between pump motor ground ter-

minal and battery negative terminal : total resistance

should be less than 15 m

Ω

!

Check body ground location.

!

Check relay supply voltage : IGN on : 11 - 14 V

!

Relay coil internal resistance : 70 - 80 

Ω

!

Replace the hydraulic modulator

!

Check by using SCANNER's stop lamp switch diag-

nosing function from sensor value output function.

!

Check connection of ECU connector side stop lamp

switch terminal.

!

Check resistance of the stop lamp, switch.

-

Each end resistance value of the switch

Application

Rear / Right OUTLET Valve

Function and Response of The

Valve

Function and Response of The

Valve

Motor Relay / Circulation Pump

Stop Lamp Switch

Defect Code

20

21

22

24

27

ANTILOCK BRAKE SYSTEM  4F-17

Application

Power Voltage

Residual Temperature

Measurement (ABD only)

Acceleration Sensor Signal (wire)

Defect Code

28

29

42

Description

when switch knob (planger) is pressed by 3mm : 

∞

-

Each ends resistance value of the switch when

switch knob(plunger) is not pressed :

less than 200 m

Ω

!

When brake is applied :

ECU (ABS:No.14, ABD:No.48) terminal 11 - 14 V

or VBattery.

When brake is released :

ECU (ABS:No.14, ABD:No.48) terminal 0 V

!

Check battery voltage.

!

Resistance between ECU (ABD:No.28 & 29,

ABS:No.19) pins and battery negative terminal :

less than 20 m

Ω

!

Resistance between ECU No.1 (ABS:NO.15) pin and

ignition terminal : less than 60 m

Ω

!

Check that normal voltage is applied to ECU

(ABD:No.1, ABS:No.15) pin when ignition switch is

turned to "ON" or "OFF".

!

Check ABS fuses of 15A and 80A.

!

Replace the ECU.

!

Check wire (ECU No.50) for open or loose contact.

!

Check connection between connectors.

!

Check relevant wires for open or short.

(When connector is removed)

!

Check voltage between ECU side ground (ABD:No.1,

ABS:No.15 pin) and acceleration sensor side ground

(ABD:No.1, ABS:No.15 pin / ECU side ABD:No.39,

ABS:No.30 pin)

(When connector is installed and power is applied)

-

Voltage : less than 0.25 V

!

Check voltage among related terminals.

(When connector is installed and power is applied)

-

Voltage between ECU (ABD:No.43, ABS:No.28 pin

and ABD:No.39, ABS:No.30 pin)

: 4.75 - 5.25 V

-

Signal voltage between ECU (ABD:No.51,

ABS:No.10) pin and (ABD:No.39, ABS:No.30) pin

: 1.95 V - 3.45 V

(Measure it by laying acceleration sensor horizon-

tally and without external force)

4F-18  ANTILOCK BRAKE SYSTEM

Application

Defect Code

Description

!

Check connection between connectors.

!

Check relevant wires for open or short.

(When connector is removed)

!

Check and replace the acceleration sensor.

!

Replace the ECU.

!

Check voltage between ECU side ground (ABD:No.1,

ABS:No.15 pin) and acceleration sensor side ground

(ABD:No.1, ABS:No.15 pin / ECU side ABD:No.39,

ABS:No.30 pin)

(When connector is installed and power is applied)

-

Voltage : less than 0.25 V

!

Check voltage among related terminals.

(When connector is installed and power is applied)

-

Voltage between ECU (ABD:No.51, ABS:No.10

pin and ABD:No39, ABS:No.30) pin

: 4.75 - 5.25 V

-

Signal voltage between ECU (ABD:No.51,

ABS:No.10 pin and ABD:No39, ABS:No.30) pin

: 1.95 V - 3.45 V

(Measure it by laying acceleration sensor horizon

tally and without external force)

43

Acceleration Sensor Signal (Signal)