Mitsubishi Outlander (2013+). Manual - part 450

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-43

YES : 

Troubleshoot for the relevant diagnosis 

code.

NO : 

Go to Step 4.

STEP 4. Check ETACS coding data
Refer to GROUP 00 

− Coding List .

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

STEP 5. ETACS-ECU variant coding
Perform the variant coding to the ETACS-ECU.

Q: Dose variant coding succeed?

YES : 

Go to Step 7.

NO : 

Replace the ETACS-ECU (Refer to GROUP 
54A 

− ETACS-ECU ), and then go to Step 7.

STEP 6. Check part number of ABS-ECU
Check the part number of ABS-ECU.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

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

P.35B-61

). Then go to 

Step 8.

STEP 7. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.

(2) Turn the ignition switch to the "OFF" position.
(3) Turn the ignition switch to the "ON" position.
(4) Turn the ignition switch to the "OFF" position.
(5) Turn the ignition switch to the "ON" position.
(6) Check that the ABS warning lamp goes out.

Q: Is the diagnosis code No.U1195 or U1197 set?

YES : 

Replace the hydraulic unit (ABS-ECU) 

(Refer to 

P.35B-61

). Then go to Step 8.

NO : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00 

− How to 

Use Troubleshooting/How to Cope with 
Intermittent Malfunctions ).

STEP 8. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to the "OFF" position.
(3) Turn the ignition switch to the "ON" position.
(4) Turn the ignition switch to the "OFF" position.
(5) Turn the ignition switch to the "ON" position.
(6) Check that the ABS warning lamp goes out.

Q: Is the diagnosis code No.U1195 or U1197 set?

YES : 

Return to Step 1.

NO : 

This diagnosis is complete.

TROUBLE SYMPTOM CHART

M1352011401667

CAUTION

• ABS may operate in the following conditions without hard braking: Slippery road surface, 

high-speed turn, and bumpy road surface. When asking the customers, confirm that they 
have/have not encountered ABS operation in corresponding conditions.

• During ABS operation, the brake pedal is pulled forward gradually, and the noise occurs at the 

same time. This is because the brake line pressure varies intermittently to prevent the wheel lock, 
and not a system malfunction.

• During diagnosis, a diagnosis code associated with other system may be set when the ignition 

switch is turned on with connector(s) disconnected. On completion, confirm all systems for diag-
nosis code(s). If diagnosis code(s) are set, erase them all.

Trouble symptom

Inspection 
procedure 
No.

Reference 
page

M.U.T.-III cannot communicate only with ABS-ECU.

1

P.35B-44

Brake warning lamp stays ON with the parking brake lever released.

2

P.35B-44

ABS warning lamp does not illuminate when ignition switch is turned to the 
ON position (Engine stopped).

3

P.35B-46

Brake warning lamp does not illuminate when the ignition switch is turned to 
ON position (Engine stopped).

4

P.35B-47

ABS warning lamp stays ON after the engine is started.

5

P.35B-48

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-44

SYMPTOM PROCEDURES

Inspection Procedure 1: M.U.T.-III cannot communication only with ABS-ECU.

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus lines 
(Refer to GROUP 54C 

− CAN Bus Diagnostics 

Table ).

• Whenever ECU is replaced, ensure that the 

CAN bus lines are normal.

• If the power is supplied with the earth circuit 

of CAN communication device open circuited, 
an electric potential abnormality may occur to 
the CAN bus lines.

COMMENTS ON TROUBLE SYMPTOM

When M.U.T.-III cannot communicate with the ABS 
system, the CAN bus line, ABS-ECU power supply 
circuit system, or ABS-ECU may be faulty.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• ABS-ECU malfunction

• Wrong routing of M.U.T.-III harness

• Abnormality in battery or alternator

• Abnormality in power supply voltage to ABS-ECU

• ECU malfunction of other system

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Check the power supply circuit, and repair if 

necessary (Refer to 

P.35B-51

).

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ).

Inspection Procedure 2: Brake warning lamp stays ON with the parking brake lever released.

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus lines 
(Refer to GROUP 54C 

− CAN Bus Diagnostics 

Table ).

• Whenever ECU is replaced, ensure that the 

CAN bus lines are normal.

OPERATION

• When the parking brake switch is turned ON, the 

combination meter (BRK terminal) is earthed, and 
then the brake warning lamp illuminates.

• When reduction of the brake fluid amount is 

detected, the brake fluid level switch is turned 
from ON to OFF. ETACS-ECU monitors the brake 
fluid level switch, and instructs the combination 
meter via the CAN bus line to illuminate the brake 
warning lamp.

COMMENTS ON TROUBLE SYMPTOM

This may be caused by earth fault in the parking 
brake switch circuit.

PROBABLE CAUSES

• The brake pad thickness is at the limit value or 

less.

Abnormality in brake operation

6

P.35B-49

ABS system inoperative

7

P.35B-50

ABS-ECU power supply circuit system

8

P.35B-51

ABS operate too frequently.

9

P.35B-53

The initial check sound of hydraulic unit is loud

10

P.35B-54

Trouble symptom

Inspection 
procedure 
No.

Reference 
page

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-45

• The brake fluid amount is at the "LOWER" level 

or lower.

• Poor adjustment of the parking brake lever

• Damaged wiring harness and connectors

• Parking brake switch malfunction

• Brake fluid level switch malfunction

• Combination meter malfunction

• ETACS-ECU malfunction

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ).

STEP 2. M.U.T.-III diagnosis code for other 
systems.
Use M.U.T.-III to check that the diagnosis code is set 
in the combination meter and ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Carry out the diagnosis for the diagnosis 

code.

NO : 

Go to Step 3.

STEP 3. Brake fluid level check
Check that the brake fluid is filled up to the "MIN" 
level or higher.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

STEP 4. Brake pad check
Refer to GROUP 35A 

− On-vehicle Service/Brake 

Pad Check .

Q: Is the check result normal?

YES : 

Fill the brake fluid up to the "MAX" level. 

Then go to Step 5.

NO : 

Replace the brake pad (Refer to GROUP 
35A 

− On-vehicle Service/Brake Pad 

Replacement ). Then go to Step 14.

STEP 5. M.U.T.-III data list for other system
Check the ETACS-ECU system data list.

Item No.

Item name Normal condition

279

Brake fluid 
switch

ON

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 6.

STEP 6. Brake fluid level switch check
Refer to GROUP 35A 

− On-vehicle Service/Brake 

Fluid Level Switch Check .

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the reservoir tank assembly (Refer 
to GROUP 35A 

− Master Cylinder Assembly 

and Brake Booster  ). Then go to Step 14.

STEP 7. Resistance measurement at brake fluid 
level switch connector.
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the brake fluid 

level switch connector (earth terminal) and the 
body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Go to Step 8.

STEP 8. Check of open circuit in earth line 
between brake fluid level switch connector and 
the body earth

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the connector(s) or wiring harness.

STEP 9. Check of short to power supply, short to 
earth, and open circuit in HL1+ line between 
ETACS-ECU connector and brake fluid level 
switch connector

Q: Is the check result normal?

YES : 

Replace the ETACS-ECU (Refer to GROUP 

54A 

− ETACS-ECU ). Then go to Step 14.

NO : 

Repair the connector(s) or wiring harness.

STEP 10. Parking brake lever stroke check
Refer to GROUP 36 

− On-vehicle Service/Parking 

Brake Lever Stroke Check and Adjustment .

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Adjust the parking brake lever stroke (Refer 
to GROUP 36 

− On-vehicle Service/Parking 

Brake Lever Stroke Check and Adjustment 
). Then go to Step 14.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-46

STEP 11. Parking brake switch check
Refer to GROUP 36 

− On-vehicle Service/Parking 

Brake Switch Check .

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Replace the parking brake switch (Refer to 
GROUP 36 

− Parking Brake Lever ). Then 

go to Step 14.

STEP 12. Check of short to power supply, short 
to earth, and open circuit in BRK line between 
combination meter connector and parking brake 
switch connector

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the connector(s) or wiring harness.

STEP 13. Retest the system.

Q: Does the brake warning lamp turn ON and OFF 

normally according to the parking brake lever 
operation?
YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/How to 

Cope with Intermittent Malfunctions ).

NO : 

Replace the combination meter assembly 
(Refer to GROUP 54A 

− Combination Meter 

). Then go to Step 14.

STEP 14. Retest the system.

Q: Does the brake warning lamp turn ON and OFF 

normally according to the parking brake lever 
operation?
YES : 

This diagnosis is complete.

NO : 

Return to Step 1.

Inspection Procedure 3: ABS warning lamp does not illuminate when ignition switch is turned to the 
ON position (engine stopped).

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnosis code may be set. Prior 
to this diagnosis, diagnose the CAN bus lines 
(Refer to GROUP 54C 

− CAN Bus Diagnostics 

Table ).

• Before replacing the ECU, ensure that the 

communication circuit is normal.

OPERATION

• ABS-ECU sends the illumination request signal of 

the ABS warning lamp to the combination meter 
through ETACS-ECU via CAN communication.

• ABS-ECU illuminates the ABS warning lamp via 

ETACS-ECU for approximately 3 seconds for 
valve check with the ignition switch turned to the 
ON position.

COMMENTS ON TROUBLE SYMPTOM

This may be caused by faults in the CAN bus line, 
ETACS-ECU, combination meter or ABS-ECU.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• ETACS-ECU malfunction

• Combination meter malfunction

• ABS-ECU malfunction

• Malfunction of coding data for ETACS-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54C 

− CAN Bus Diagnostics Table ). Then 

go to Step 9.

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

Q: Is the diagnosis code set?

YES : 

Carry out the diagnosis for the diagnosis 

code (Refer to 

P.35B-11

).

NO : 

Go to Step 3.

STEP 3. M.U.T.-III Special Function for other 
system
Perform the following special function by the combi-
nation meter system, and check if the ABS warning 
lamp illuminates (Refer to GROUP 54A 

− Combina-

tion Meter ).

• Item 6: Indicator (AUTO)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the combination meter.