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.