Mitsubishi Outlander GS45X. Manual - part 373

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-113

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics Table 

P.54C-17

). On 

completion, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is the DTC C1073 set?

YES : Go to Step 3.
NO :  The procedure is complete.

STEP 3. Battery check
Refer to GROUP 54A 

− Battery Test 

P.54A-9

.

Q: Is the battery in good condition?

YES : Go to Step 4.
NO :  Replace the battery. Then go to Step 11.

STEP 4. Charging system check
Refer to GROUP 16 

− On−vehicle Service/Output Current Test 

P.16-9

 (3.0L engine).

Q: Is the charging system in good condition?

YES : Go to Step 5.
NO :  Repair or replace the charging system component(s). 

Then go to Step 11.

STEP 5. Connector check: A-01 ABS-ECU connector
Q: Is the check result normal?

YES : Go to Step 6.
NO  :  Repair the defective connector. Then go to Step 11.

STEP 6. Fusible link check: Check the fusible link No.26.
Visually check for open circuit in the fusible link No.26.
Q: Is the check result normal?

YES : Go to Step 8.
NO :  Go to Step 7.

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-114

STEP 7. Resistance measurement at A-01 ABS-ECU 
connector
(1) Disconnect the ABS-ECU connector, connect special tool 

ABS check harness (MB991974) to the harness-side 
connector, and then measure the resistance at the special 
tool connector side.
NOTE: Do not connect the special tool ABS check harness 
(MB991974) to ABS-ECU.

(2) Measure the resistance between the terminal No.13 and the 

body ground.

OK: No continuity

Q: Is the check result normal?

YES : Replace the fusible link No.26. Then go to Step 11.
NO :  The short circuit may be present in the power supply 

circuit. Repair the wiring harness between the A-01 
ABS-ECU connector terminal No.13 and the fusible 
link No.26, and then replace the fusible link No.26. 
Then go to Step 11.

STEP 8. Voltage measurement at the A-01 ABS-ECU 
connector
(1) Disconnect the ABS-ECU connector, connect special tool 

ABS check harness (MB991974) to the harness-side 
connector, and then measure the resistance at the special 
tool connector side.
NOTE: Do not connect the special tool ABS check harness 
(MB991974) to ABS-ECU.

(2) Measure the voltage between the terminal No.13 and the 

body ground.

OK: Approximately system voltage

Q: Is the check result normal?

YES : Go to Step 9.
NO :  The open circuit may be present in the power supply 

circuit. Repair the wiring harness between the A-01 
ABS-ECU connector terminal No.13 and the fusible 
link No.26. Then go to Step 11.

AC606869 HK

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

AC606869AO

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-115

STEP 9. Resistance measurement at A-01 ABS-ECU 
connector
(1) Disconnect the ABS-ECU connector, connect special tool 

ABS check harness (MB991974) to the harness-side 
connector, and then measure the resistance at the special 
tool connector side.
NOTE: Do not connect the special tool ABS check harness 
(MB991974) to ABS-ECU.

(2) Measure the resistance between the terminal No.1 and the 

body ground, and between the terminal No.14 and the body 
ground

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : Go to Step 10.
NO :  An open circuit may be present in the ground circuit. 

Repair the wiring harness between the A-01 
ASC-ECU connector terminal No.1 and the body 
ground, and between the A-01 ASC-ECU connector 
terminal No.14 and the body ground. Then go to Step 
11.

STEP 10. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12mph (20 km/h) or higher.

NOTE: The ABS warning light does not turn OFF in some 
cases unless the vehicle runs at 12mph (20 km/h) or higher.

Q: Is the DTC C1073 set?

YES : Replace the hydraulic unit (integrated with ABS-ECU) 

(Refer to 

P.35B-188

). Then go to Step 11.

NO :  Intermittent malfunction (Refer to GROUP 00 

− How 

to Use Troubleshooting/How to Cope with Intermittent 
Malfunctions 

P.00-15

).

STEP 11. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12mph (20 km/h) or higher.

NOTE: The ABS warning light does not turn OFF in some 
cases unless the vehicle runs at 12mph (20 km/h) or higher.

Q: Is the DTC C1073 set?

YES : Return to Step 1.
NO :  The procedure is complete.

AC606869AP

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-116

DTC C2116 Abnormality in power supply voltage in pump motor

ETACS-
ECU

AC703731

ABS-ECU

34

27

26

IGNITION 
SWITCH (IG1)

AB

Power Supply Circuit

FUSIBLE 
LINK

FUSIBLE 
LINK

FUSIBLE 
LINK

1G1 
RELAY

SOLENOID VALVE 
POWER SUPPLY

MOTOR POWER 
SUPPLY

POWER 
SUPPLY

AC901112

Connector: A-01

A-01 (B)

AE