Mitsubishi Outlander (2013+). Manual - part 452

 

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Mitsubishi Outlander (2013+). Manual - part 452

 

 

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-51

STEP 3. Check the ABS-ECU power supply 
circuit.
Refer to 

P.35B-51

.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Carry out the diagnosis of ABS-ECU power 
supply circuit system (Refer to 

P.35B-51

). 

Then go to Step 7.

STEP 4. Hydraulic unit (integrated with 
ABS-ECU) check
Check that the brake tube is correctly mounted to the 
hydraulic unit (integrated with ABS-ECU) (Refer to 

P.35B-61

).

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Connect the brake tube correctly. Then go 
to Step 7.

STEP 5. Operation check

Q: Does the ABS work normally?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

NO : 

Check the brake system related 
components except ABS. Then go to Step 6.

STEP 6. Operation check

Q: Does the ABS work normally?

YES : 

This diagnosis is complete.

NO : 

Replace the hydraulic unit (integrated with 
ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 7.

STEP 7. Operation check

Q: Does the ABS warning lamp turn ON and OFF 

normally?
YES : 

This diagnosis is complete.

NO : 

Return to Step 1.

Inspection Procedure 8: ABS-ECU power supply circuit system

CAUTION

• When the ABS-ECU power supply voltage 

becomes 9.7 

± 0.3 V or less, the ABS warning 

lamp illuminate, and the ABS control is pro-
hibited.

• If the battery terminal is not tightened prop-

erly, a dump surge may occur and the power 
supply voltage may become abnormally high 
for a short time.

OPERATION

• ABS-ECU contains the power supply circuit (+BV 

terminal) for the solenoid valve. The solenoid 
valve is energised by the valve relay, which is 
incorporated in ABS-ECU.

• ABS-ECU contains the power supply circuit (+BM 

terminal) for the pump motor. The pump motor is 
energised by the motor relay, which is incorpo-
rated in ABS-ECU.

• ABS-ECU contains the power supply circuit (IG1 

terminal) for ABS-ECU. When the ignition switch 
(IG1) is turned ON, the voltage is applied to the 
relay incorporated in ETACS-ECU to turn ON the 
relay, and the power is supplied from fusible link 
through multi-purpose fuse.

• When malfunction occurs in ABS-ECU power 

supply, the communication with M.U.T.-III 
becomes unavailable.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of fuse and fusible link

• Improper tightening of battery terminal

• Improper tightening of earth bolt

• Battery failure

• Charging system failed

• Malfunction of ABS-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Battery check
Refer to GROUP 54A 

− Battery Test .

Q: Is the battery in good condition?

YES : 

Go to Step 3.

NO : 

Charge or replace the battery. Then go to 
Step 2.

STEP 2. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Alternator 

Output Line Voltage Drop Test .

Q: Is the charging system in good condition?

YES : 

Go to Step 3.

NO : 

Repair or replace the charging system 
component(s).

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-52

STEP 3. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the ETACS. Refer to GROUP 

54A - ETACS .

NO : 

Go to Step 4.

STEP 4. Voltage measurement at the ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between ABS-ECU (+BV 

terminal) and body earth.

OK: Approximately system voltage

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

STEP 5. Check of short to power supply, short to 
earth, and open circuit in +BV line between 
fusible link and ABS-ECU connector

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Repair the fusible link, connector(s) or 
wiring harness. Then go to Step 13.

STEP 6. Voltage measurement at the ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between ABS-ECU (+BM 

terminal) and body earth.

OK: Approximately system voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 7.

STEP 7. Check of short to power supply, short to 
earth, and open circuit in +BM line between 
fusible link and ABS-ECU connector

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Repair the fusible link, connector(s) or 
wiring harness. Then go to Step 13.

STEP 8. Voltage measurement at the ABS-ECU 
connector.
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between ABS-ECU (IG1 

terminal) and body earth.

OK: Approximately system voltage

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 9.

STEP 9. Check of short to power supply, short to 
earth, and open circuit in IG1 line between 
ETACS-ECU and ABS-ECU connector

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Repair the connector(s) or wiring harness. 
Then go to Step 13.

STEP 10. Resistance measurement at ABS-ECU 
connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between the ABS-ECU (GND1 

terminal) and the body earth, and between the 
ABS-ECU (GND2 terminal) and the body earth

OK: Continuity exists (2 

 or less)

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Go to Step 11.

STEP 11. Check of open circuit in GND1, GND2 
line between ABS-ECU connector and body earth

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Repair the connector(s) or wiring harness. 
Then go to Step 13.

STEP 12. Retest the system.

Q: Is the communication with M.U.T.-III possible?

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-53

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

NO : 

Replace the hydraulic unit (integrated with 
ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 13.

STEP 13. Retest the system.

Q: Is the communication with M.U.T.-III possible?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

INSPECTION PROCEDURE 9: ABS operates too frequently.

CAUTION

Whenever ECU is replaced, ensure that the CAN 
bus lines are normal.

COMMENTS ON TROUBLE SYMPTOM

• Although the cause of the trouble cannot be 

clearly resolved since it depends on the running 
status and road surface condition, the malfunc-
tion of the hydraulic circuit may occur if any diag-
nosis code is not detected.

• If wheels and tyres other than the ones with gen-

uine specified size are mounted, the ABS may be 
activated prematurely.

• If a non-genuine braking device or non-genuine 

impact reduction device is mounted, the ABS 
may be activated prematurely.

PROBABLE CAUSES

• Mounting of wheels and tyres other than with 

genuine specified size

• Tyre pressure abnormality

• Tyre wear and deterioration

• Mounting of non-genuine braking device or 

impact reduction device

• Wheel alignment abnormality

• Malfunction of brake related parts

• ABS-ECU malfunction

• Malfunction of hydraulic circuit

• External radio wave noise interference

DIAGNOSIS PROCEDURE

STEP 1. Check the wheels and the tyres.
Carry out the following check.

• Size check of wheels and tyres

• Tyre wear and deterioration statuses

• Check the tyre pressure.

NOTE: For the tyre pressure, refer to the tyre pres-

sure label attached to the lower section of driver's 
side door striker.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Correct the wheels and tyres in good 
condition. Then go to Step 9.

STEP 2. Diagnosis code check
Use M.U.T.-III to check the diagnosis code for the 
ABS system. (Refer to 

P.35B-11

.)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Carry out the diagnosis for the diagnosis 
code. (Refer to 

P.35B-11

.) Then go to Step 

9.

STEP 3. Check of brake system related 
components other than hydraulic unit (integrated 
with ABS-ECU)
At the same time with the following checks, also 
check that no parts other than the genuine parts are 
mounted.

• Brake pad check (Refer to GROUP 35A − 

On-vehicle Service/Brake Pad Check ).

• Brake disc runout check (Refer to GROUP 35A − 

On-vehicle Service/Brake Disk Check ).

• Brake drag force check (Refer to GROUP 35A − 

Front Disc Brake Assembly  or GROUP 35A 

− 

Rear Disc Brake Assembly ).

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair or replace the part(s) having damage 
or other problems. Then go to Step 9.

STEP 4. Wheel alignment check
At the same time with the following checks, also 
check that no parts other than the genuine parts are 
mounted.

• Front wheel alignment check (Refer to GROUP 

33 

− On-vehicle Service/Front Wheel Alignment 

Check and Adjustment .)

• Rear wheel alignment check (Refer to GROUP 

34 

− On-vehicle Service/Rear Wheel Alignment 

Check and Adjustment .)

Q: Is the check result normal?

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-54

YES : 

Go to Step 5.

NO : 

Repair or replace the part(s) having damage 
or other problems. Then go to Step 9.

STEP 5. M.U.T.-III data list
Check the following data list. (Refer to 

P.35B-54

.)

• Item No.01: FL wheel speed sensor

• Item No.02: FR wheel speed sensor

• Item No.03: RL wheel speed sensor

• Item No.04: RR wheel speed sensor

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

STEP 6. Wheel speed sensor check
Check that no non-genuine electronic device or no 
wiring harness of other than genuine electronic 
device is mounted near the wheel speed sensor (at 
wheel speed detection section and wiring harness 
section) (Refer to 

P.35B-63

<Front> or 

P.35B-65

<Rear>).

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Remove the non-genuine electronic device 
or the wiring harness of non-genuine 
electronic device. Then go to Step 9.

STEP 7. Hydraulic unit check
Carry out the following actuator tests, and check if 
they work normally (Refer to 

P.35B-55

).

• Item No.01: FL wheel ABS

• Item No.02: FR wheel ABS

• Item No.03: RL wheel ABS

• Item No.04: RR wheel ABS

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Replace the hydraulic unit (integrated with 
ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 9.

STEP 8. ABS operation check

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

NO : 

Replace the hydraulic unit (integrated with 
ABS-ECU) (Refer to 

P.35B-61

). Then go to 

Step 9.

STEP 9. ABS operation check

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Return to Step 1.

Inspection Procedure 10: The initial check sound of hydraulic unit is loud.

CAUTION

When installing brake tube, match the axial 

centre of flare nut and brake tube with the centre 
of hole at the hydraulic unit side, and check that 
the fluid does not leak.

COMMENT ON TROUBLE SYMPTOM

The operation sound may be decreased by reducing 
the load at the rubber mount portion of the brake 
tube and hydraulic unit. 

PROBABLE CAUSES

• Improper installation of the hydraulic unit

• Improper installation of the brake tube

DIAGNOSIS PROCEDURE

DRIVING CHECK
(1) Turn the ignition switch from the "LOCK" (OFF) 

position to the "ON" position.

(2) When vehicle speed reaches 10 km/h, check the 

operating sound volume and compare it with that 
of the same model.

OK: The operating sound is the same vol-
ume or less by comparing with that of the 
same model.

Q: Is the check result normal?

YES : 

This diagnosis is complete.

NO : 

Carry out adjustment for hydraulic unit 
installation. (Refer to 

P.35B-59

).

DATA LIST REFERENCE TABLE

M1352011501471

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

The following items of ECU input data can be read 
using M.U.T.-III.

 

 

 

 

 

 

 

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