Mitsubishi Colt Ralliart. Manual - part 245

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-72

DATA LIST REFERENCE TABLE

M1352011500746

The following items can be read by the M.U.T.-III 
from the ABS-ECU input data.

When the system is normal.

When the ABS-ECU shut off ABS operation.

When the diagnosis system stops the ABS-ECU, the 
M.U.T.-III display data will be unreliable.

Item 
No.

Check item

Checking requirements

Normal valve

01

Front-right wheel speed sensor

Perform a test run

Vehicle speeds 
displayed on the 
speedometer and 
M.U.T.-III are 
identical.

02

Front-left wheel speed sensor

03

Rear-right wheel speed sensor

04

Rear-left wheel speed sensor

05

Power supply voltage

Ignition: ON

10 

− 16V or more

06

Stop lamp switch

When the brake pedal is depressed

ON

When the brake pedal is released

OFF

07

Valve relay

When ABS is operating

ON

When ABS is not operating

OFF

10

FL inlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

11

FL outlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

12

FR inlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

13

FR outlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

14

RL inlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

15

RL outlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

16

RR inlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

17

RR outlet valve 

When ABS is operating

ON

When ABS is not operating

OFF

20

Pump motor

When ABS is operating

ON

When ABS is not operating

OFF

Main

Index

Group

TOC

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-73

ACTUATOR TEST REFERENCE TABLE

M1352011600743

The M.U.T.-III activates the following actuators for 
testing.
NOTE: If the ABS-ECU runs down, actuator testing 
cannot be carried out.
NOTE: Actuator testing is only possible when the 
vehicle is stationary.

ACTUATOR TEST SPECIFICATIONS

CHECK AT ABS-ECU

M1352011800725

Use the following steps to remove the connector 
cover and measure the terminal voltage.

1. Move the lock lever of the ABS-ECU connector as 

shown in the illustration, and then disconnect the 
ABS-ECU connector. 

TERMINAL VOLTAGE CHECK CHART

1. Measure the voltages between earth terminal (23) 

or (26) and each respective terminal.

2. The terminal layouts are shown in the illustrations 

below.

NOTE: Do not measure terminal voltage for approxi-
mately three seconds after the ignition switch is 
turned to the "ON" position. The ABS-ECU performs 
the initial check during that period.

No. Item
01

Solenoid valve for 
front-left wheel

Solenoid valves 
and pump motor in 
the hydraulic unit 
(simple inspection 
mode)

02

Solenoid valve for 
front-right wheel

03

Solenoid valve for 
rear-left wheel

04

Solenoid valve for 
rear-right wheel

AC300188AD

Activation Pattern

A

B

C

Start of 
activation

1 s

2 s

On

Off

Note
A:
B:
C:

Hydraulic pressure increases
Hydraulic pressure holds
Hydraulic pressure decreases

End of
activation

Solenoid
valve

Pump
motor

AC208370AB

Lock lever

AC209204

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

Check connector

MB991951

AC

ABS-ECU
connector A-05

Main

Index

Group

TOC

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-74

Terminal No. Check item

Checking requirements

Normal condition

18

Input to stop lamp 
switch

Stop lamp switch: OFF

System voltage

Stop lamp switch: ON

Approximately 0 V

6

Input from front wheel 
speed sensor (RH)

Ignition switch: ON

0.4 

− 1.3 V

7

Power supply to front 
wheel speed sensor 
(RH)

Ignition switch: ON

System voltage

8

Power supply to rear 
wheel speed sensor 
(RH)

Ignition switch: ON

System voltage

10

Power supply to rear 
wheel speed sensor 
(LH)

Ignition switch: ON

System voltage

11

Input from front wheel 
speed sensor (LH)

Ignition switch: ON

0.4 

− 1.3 V

19

Input from rear wheel 
speed sensor (RH)

Ignition switch: ON

0.4 

− 1.3 V

20

Power supply from 
ignition switch (IG1)

Ignition switch: ON

System voltage

21

Input from rear wheel 
speed sensor (LH)

Ignition switch: ON

0.4 

− 1.3 V

22

Power supply to front 
wheel speed sensor 
(LH)

Ignition switch: ON

System voltage

23

Earth (solenoid valve 
and ABS-ECU)

Always

0 V

24

Battery power supply 
<solenoid valve 
(fusible link No.5)>

Always

System voltage

25

Battery power supply 
<motor (fusible link 
No.3)>

Always

System voltage

26

Earth (motor)

Always

0 V

Main

Index

Group

TOC

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-75

RESISTANCE AND CONTINUITY 
BETWEEN HARNESS-SIDE CONNECTOR 
TERMINALS

1. Turn the ignition switch to the "LOCK" (OFF) 

position and disconnect the ABS-ECU connectors 
before checking resistance and continuity.

2. Check the resistance and continuity between the 

terminals indicated in the table below.

3. The terminal layout is shown in the illustration.

AC208370AB

Lock lever

AC209203

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

MB991951

AC

Check connector

ABS-ECU
connector A-05

ABS-ECU terminal No.

Signal

Normal condition

23 

− body earth

Earth

Less than 1 

Ω

26 

− body earth

Earth

Less than 1 

Ω

Main

Index

Group

TOC