Mitsubishi Outlander GS45X. Manual — part 372

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-109

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) Disconnect the fusible link No.27.
(3) Measure the resistance between the terminal No.26 and the

body ground.

OK: No continuity

Q: Is the check result normal?

YES : Replace the fusible link No.27. 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.26 and the fusible
link No.27, and then replace the fusible link No.27.
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.26 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.26 and the fusible
link No.27. Then go to Step 11.

AC606869 HJ

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

AC606869AM

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-110

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

STEP 10. Check whether the DTC is reset.
Erase the DTC.
Q: Is the DTC C2104 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.
Erase the DTC.
Q: Is the DTC C2104 set?

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

AC606869AN

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU
harness connector

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-111

DTC C1073 Faulty motor drive circuit

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

ABS DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-112

CAUTION

If there is any problem in the CAN bus lines, an incorrect
DTC may be set. Prior to this diagnosis, diagnose the CAN
bus lines (Refer to GROUP 54C

− CAN Bus Line Diagnostic

Flow

P.54C-10

).

.

OPERATION

• ABS-ECU contains the power supply circuit (terminal

No.13) for the pump motor. The pump motor is energized by
the motor switch, which is incorporated in ABS-ECU.

• The pump motor switch, which is incorporated in ABS-ECU,

is always off unless the ABS operating or the motor sole-
noid valve check is activated when the vehicle is started.

• ABS-ECU activates the pump motor by turning on the ECU

built-in pump motor switch.

.

DTC SET CONDITIONS

If the pump motor switch voltage drop indicates high value
when the pump motor operates or after the operation, the pump
motor operation is stopped and this DTC is set.

.

PROBABLE CAUSES

Current trouble

• Fusible link malfunction

• Damaged wiring harness and connectors

• Abnormality in battery or generator

• ABS-ECU malfunction

Past trouble

• Carry out diagnosis with particular emphasis on wiring har-

ness and connector failures between the power supply cir-
cuit (A-01 ABS-ECU connector terminal No.13) to the
ABS-ECU motor and the ground circuit (A-01 ABS-ECU
connector terminal No.1). For diagnosis procedures, refer to
How to treat past trouble (GROUP 00

− How to Use Trou-

bleshooting/How to Treat Past Trouble

P.00-17

).

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

• MB991974: ABS check harness