Mitsubishi Pajero Pinin. Manual - part 253

ABS<4WD>  – 

General Information

35B-3

ABS-ECU

EBD HYDRAULIC PRESSURE CONTROL

The procedures are the same as that used in PAJERO except for the items shown below.

Item

PAJERO-PININ

PAJERO

EBD control condition

When the difference between the rear
wheel speed and the vehicle speed
exceeds the set value.

When the difference between the
rear wheel speed and the front
wheel speed exceeds the set
value.

Rear wheel
speed sensor

Front wheel
speed sensor

Vehicle speed

Set value of
EBD slip ratio

Set value of

ABS slip ratio

ABS control (Rear wheel)

ABS control (Front wheel)

Speed

Time

<PAJERO-PININ>

<PAJERO>

Rear wheel
speed sensor

Front wheel
speed sensor

Vehicle speed

Set value of
EBD slip ratio

Set value of
ABS slip ratio

ABS control (Rear wheel)

ABS control (Front wheel)

Speed

Time

EBD control

EBD control

ABS<4WD>  – 

General Information

35B-4

FAIL-SAFE FUNCTION

The procedures are the same as that used in PAJERO except for the items shown below.

Item

PAJERO-PININ

PAJERO

Warning lamp during fail-safe opera-
tion

ABS warning lamp

Brake warning lamp

Diagnosis

d N

Item

Action during fail-safe operation

g

code No.

ABS control

EBD control

ABS warn-
ing lamp

11

Open circuit or short-circuit in
wheel speed sensor (FR)

If faulty wheels include
two rear wheels:
C

t l

t

d i

ll

If faulty wheels include
two rear wheels:
C

t l t

d

Illuminated

12

Open circuit or short-circuit in
wheel speed sensor (FL)

Control stopped in all
wheels
Other than the above:

Control stopped
Other than the above:
Control carried out

13

Open circuit or short-circuit in
wheel speed sensor (RR)

Other  than  the above:
Control stopped in faulty
wheels

Control carried out

14

Open circuit or short-circuit in
wheel speed sensor (RL)

wheels

15

Problem with any one of the
four wheel speed sensors

16

Abnormal drop or rise in
ABS-ECU power supply volt-
age

Control stopped

Control stopped

Illuminated

21

Wheel speed sensor (FR)
system

If faulty wheels include
two rear wheels:
C

t l

t

d i

ll

If faulty wheels include
two rear wheels:
C

t l t

d

Illuminated

22

Wheel speed sensor (FL)
system

Control stopped in all
wheels
Other than the above:

Control stopped
Other than the above:
Control carried out

23

Wheel speed sensor (RR)
system

Other  than  the above:
Control stopped in faulty
wheels

Control carried out

24

Wheel speed sensor (RL)
system

wheels

32

G sensor system

Control stopped

Control carried out

Illuminated

33

Stop lamp switch system

Control stopped

Control carried out

Illuminated

41

Solenoid valve (FR) system

System interrupted

System interrupted

Illuminated

42

Solenoid valve (FL) system

y

y

43

Solenoid valve (RR) system

44

Solenoid valve (RL) system

51

Valve relay ON problem

Control stopped

Control carried out

Illuminated

52

Valve relay OFF problem

System interrupted

System interrupted

Illuminated

53

Motor relay OFF problem

Control stopped

Control carried out

Illuminated

54

Motor relay ON problem

System interrupted

Control carried out

Illuminated

55

Motor system

Control stopped

Control carried out

Illuminated

63

ABS-ECU abnormality

System interrupted

System interrupted

Illuminated

NOTE
Control stopped: Control is not carried out until the ignition switch is turned to the “LOCK” (OFF) position.
However, if the problem returns to normal, control is carried out again.
System interrupted: Control is not carried out until the valve relay turns off and the ignition switch is turned
to the “LOCK” (OFF) position.

ABS <4WD> – 

Troubleshooting

35B-5

TROUBLESHOOTING

INSPECTION CHART FOR DIAGNOSIS CODES

Diagnosis code No.

Inspection item

Reference page

11

Front right wheel speed sensor (Open circuit or short circuit)

35B-6

12

Front left wheel speed sensor (Open circuit or short circuit)

35B-6

13

Rear right wheel speed sensor (Open circuit or short circuit)

35B-6

14

Rear left wheel speed sensor (Open circuit or short circuit)

35B-6

15

Wheel speed sensor (Abnormal output signal)

–

16*

ABS-ECU power supply system (Abnormal voltage drop or rise)

35B-7

21

Front right wheel speed sensor

35B-6

22

Front left wheel speed sensor

35B-6

23

Rear right wheel speed sensor

35B-6

24

Rear left wheel speed sensor

35B-6

32

G sensor system

35B-7

33

Stop lamp switch system

–

41

Front right solenoid valve

The diagnosis codes are output
when there is no response to the

35B-8

42

Front left solenoid valve

when  there  is no response to  the
drive signals for respective solenoid
valves or the ABS ECU power

43

Rear right solenoid valve

valves or the  ABS-ECU power
supply system is defective.

44

Rear left solenoid valve

51

Valve relay problem (stays on)

–

52

Valve relay problem (stays off) or ABS-ECU power supply system
problem

35B-8

53

Motor relay problem (stays off) or ABS-ECU power supply system
problem

54

Motor relay problem (stays on)

–

55

Motor system (seized pump motor) or ABS-ECU power supply system
problem

35B-8

63

ABS-ECU

–

NOTE
*: Turning the ignition switch to ACC will erase the diagnosis code No.16.

ABS <4WD> – 

Troubleshooting

35B-6

INSPECTION PROCEDURE FOR DIAGNOSIS CODES

Code Nos.11, 12, 13 and 14 Wheel speed sensor 
(open circuit or short circuit)

Probable cause

Code Nos.21, 22, 23 and 24 Wheel speed sensor

Code Nos. 11, 12, 13 and 14 are output if the ABS-ECU detects an open circuit
or short-circuit in the (+) wire or (–) wire in any one of the four wheel speed sensors.



Malfunction of wheel speed sensor



Malfunction of wiring harness or connector



Malfunction of hydraulic unit and ABS-ECU

Code Nos. 21, 22, 23 and 24 are output in the following cases.



When there is no input from any one of the four wheel speed sensors when
travelling at several km/h or more, even though open circuit can not be verified.



When a chipped or blocked-up ABS rotor is detected and if the anti-lock system
operates continuously because a malfunctioning sensor or a warped ABS rotor
is causing sensor output to drop.



Malfunction of wheel speed sensor



Malfunction of wiring harness or connector



Malfunction of ABS rotor



Too much gap between the sensor and the ABS rotor



Malfunction of hydraulic unit and ABS-ECU



Malfunction of wheel bearing

NG

Replace

OK

NG

Check the harness wire, and repair if necessary.



Between each wheel speed sensor and ABS-ECU

NG

Repair

OK

Wheel bearing check
(Refer to GROUP 26 and
GROUP 27 – On-vehicle
Service.)

NG

Repair

NG

Replace the hydraulic unit and ABS-ECU.

OK

Check the trouble symp-
tom.

Check the following connector: A-58

OK

ABS rotor check

NG

Replace

NG

Wheel speed sensor
check 

NG

Replace

OK

Wheel speed sensor output voltage check (Refer to P.35B-14.)

OK

Check the trouble symp-
tom.

OK

Check the following connectors:
A-58, C-25<L.H. drive vehicles>, C-24<R.H. drive vehicles>, A-24,
A-85, D-24, D-28

OK

Measure at the ABS-ECU connector A-58.



Disconnect the connector, and measure at the harness side
connector.



Resistances between 26 and 27, 4 and 5, 2 and 1, 24 and
23
OK: 1.30  – 1.58 k

Ω

NG

Wheel speed sensor check

Wheel speed sensor installation check

NG

Repair