Mitsubishi Outlander (2003+). Manual - part 278

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-55

INSPECTION PROCEDURE 4: Faulty ABS Operation

COMMENT ON TROUBLE SYMPTOM
The cause depends on driving and road surface 
conditions, so diagnosis may be difficult. However, if 
no diagnosis code is set, carry out the following 
inspection.

PROBABLE CAUSES
The most likely cause for this case is:

•

Malfunction of the hydraulic unit

DIAGNOSIS
Check the hydraulic unit (Refer to 

P.35B-61

). If the 

hydraulic unit (integrated with ABS-ECU) is 
malfunctioning, replace it. Then check that the 
malfunction symptom is eliminated.

DATA LIST REFERENCE TABLE

M1352011500661

The following items can be read by the MUT-II/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 
MUT-II/III display data will be unreliable.

Item 
No.

Check item

Checking requirements

Normal valve

11

Front-right ABS sensor

Perform a test run

Vehicle speeds 
displayed on the 
speedometer and 
MUT-II/III are 
identical.

12

Front-left ABS sensor

13

Rear-right ABS sensor

14

Rear-left ABS sensor

21

ABS-ECU power supply voltage

Ignition switch: ON

10 

−

 16 V

32

G-sensor <4WD>

•

Ignition switch: ON

•

When vehicle is parked on a level 
surface.

2.4 

−

 2.6 V

When vehicle is accelerated

4.0 

−

 1.0 V

When vehicle is decelerated

1.0 

−

 4.0 V

36

Stop lamp switch

Depress the brake pedal.

ON

Release the brake pedal.

OFF

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-56

ACTUATOR TEST REFERENCE TABLE

M1352011600679

The MUT-II/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

M1352011800640

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. 

AC100172 AG

Activation pattern

A

B

C

Solenoid
valve

End of 
activation

Start of
activation

1 s

2 s

Pump
motor

ON

OFF

NOTE
A:
B:
C:

Hydraulic pressure increases
Hydraulic pressure holds
Hydraulic pressure decreases

0.01 s

0.05 s

No. Item
01

Solenoid valve for 
front-left wheel

Solenoid valves 
and pump motors 
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

AC200022

AE

Lock lever

AC103604AC

ABS-ECU connector

Connector cover

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-57

TERMINAL VOLTAGE CHECK CHART

1. Measure the voltages between earth terminal (2) 

or (18) and each respective terminal.

2. The terminal layouts are shown in the illustrations 

below.

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

AC300659

Terminal No. Check item

Checking requirements

Normal condition

1

Solenoid valve power 
supply

Always

System voltage

3

Stop lamp switch input Stop lamp switch: "ON" 

System voltage

Stop lamp switch: "OFF" 

Approximately 0 V

4

Diagnosis changeover 
input

When the MUT-II/III is connected

Approximately 0 V

When the MUT-II/III is not connected

System voltage

8

G-sensor earth 
<4WD>

Always

Approximately 0 V

12

ABS-ECU warning 
lamp transistor output

Ignition 
switch: "ON" 

When the lamp is switched off

Approximately 0 V

When the lamp is illuminated

System voltage

13

MUT-II/III

When the MUT-II/III is connected

Serial 
communication with 
MUT-II/III

When the MUT-II/III is not connected

Approximately 0 V

15

G-sensor input 
<4WD>

•

Ignition switch: "ON" 

•

Horizontal state of vehicle

2.4 

−

 2.6 V

19

Motor power supply

Always

System voltage

20

ABS-ECU power 
supply

Ignition switch: "ON" 

System voltage

Ignition switch: "START" 

Approximately 0 V

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-58

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.

AC300662

ABS-ECU terminal No.

Signal

Normal condition

9 

−

 10

Front-right ABS sensor

1.24 

−

 1.64 k

Ω

11 

−

 17

Rear-right ABS sensor

1.24 

−

 1.64 k

Ω

16 

−

 26

Front-left ABS sensor

1.24 

−

 1.64 k

Ω

27 

−

 28

Rear-left ABS sensor

1.24 

−

 1.64 k

Ω

2 

−

 body earth

Earth

Less than 2 

Ω

18 

−

 body earth

Earth

Less than 2 

Ω