Mitsubishi Grandis. Manual — part 903

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-27

NOTE: Do not connect special tool ABS Check
Harness (MB991974) to the ABS-ECU.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between the relevant signal

and earth terminals in the wheel speed sensor
circuit and body earth.

OK: Less than 1V

• Code No.C1201 is set: Between signal

terminal 5 and body earth, and between earth
terminal 6 and body earth

• Code No.C1206 is set: Between signal

terminal 8 and body earth, and between earth
terminal 9 and body earth

• Code No.C1211 is set: Between signal

terminal 11 and body earth, and between
earth terminal 12 and body earth

• Code No.C1216 is set: Between signal

terminal 2 and body earth, and between earth
terminal 3 and body earth

Q: Is the check result normal?

YES :

Go to Step 9.

NO (When the voltage between terminal 5 or 6

−

and body earth measures more than 1 V) :

Go to

Step 10.

NO (When the voltage between terminal 8 or 9

−

and body earth measures more than 1 V) :

Go to

Step 11.

NO (When the voltage between terminal 11 or 12

−

and body earth measures more than 1 V) :

Go to

Step 12.

NO (When the voltage between terminal 2 or 3

−

and body earth measures more than 1 V) :

Go to

Step 13.

STEP 9. Resistance measurement at ABS-ECU
connector A-03.

(1) Disconnect the connector A-03, and connect

special tool ABS Check Harness (MB991974) to
the wiring harness-side connector.
NOTE: Do not connect special tool ABS Check
Harness (MB991974) to the ABS-ECU.

(2) Measure the resistance between the relevant

signal and earth terminals in the wheel speed

AC312620AS

Oil reservoir

Connector: A-03

ABS-ECU

MB991974

Check connector

A-03 Harness connector

A-03

Hydraulic unit
(with built-in ABS-ECU)

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-28

sensor circuit and body earth.

OK: No continuity

• Code No.C1201 is set: Between signal

terminal 5 and body earth, and between earth
terminal 6 and body earth

• Code No.C1206 is set: Between signal

terminal 8 and body earth, and between earth
terminal 9 and body earth

• Code No.C1211 is set: Between signal

terminal 11 and body earth, and between
earth terminal 12 and body earth

• Code No.C1216 is set: Between signal

terminal 2 and body earth, and between earth
terminal 3 and body earth

Q: Is the check result normal?

YES (Continuity exists between terminal 5 or
terminal 6 and body earth) :

Go to Step 10.

YES (Continuity exists between terminal 8 or
terminal 9 and body earth) :

Go to Step 11.

YES (Continuity exists between terminal 11 or
terminal 12 and body earth) :

Go to Step 12.

YES (Continuity exists between terminal 2 or
terminal 3 and body earth) :

Go to Step 13.

NO :

Go to Step 14.

STEP 10. Check ABS-ECU connector A-03 and
wheel speed sensor <front: RH> connector A-02
for loose, corroded or damaged terminals, or
terminals pushed back in the connector.

Q: Is the check result normal?

AC312621

Oil reservoir

Connector: A-03

AC

A-03

Hydraulic unit
(with built-in ABS-ECU)

A-03 Harness connector
(harness side)

AC312616AB

Connector: A-02

A-02 (GR)

A-02 Harness
connector
(harness side)

AC312618AB

Connector: A-02 <R.H.drive vehicles>

A-02 (GR)

A-02 Harness
connector
(harness side)

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-29

YES :

Open or short circuit may be present in the

front right wheel speed sensor circuit.
Repair the wiring harness between
ABS-ECU connector A-03 (terminals 5 and
6) and front right wheel speed sensor A-02
(terminals 1 and 2). Then go to Step 15.

NO :

Repair or replace the damaged
component(s). Then go to Step 15.

STEP 11. Check ABS-ECU connector A-03 and
wheel speed sensor <front: LH> connector A-05
for loose, corroded or damaged terminals, or
terminals pushed back in the connector.

Q: Is the check result normal?

AC312621

Oil reservoir

Connector: A-03

AC

A-03

Hydraulic unit
(with built-in ABS-ECU)

A-03 Harness connector
(harness side)

AC312617AB

Connector: A-05 <L.H.drive vehicles>

A-05 (GR)

A-05 Harness
connector
(harness side)

AC312619AB

Connector: A-05 <R.H.drive vehicles>

A-05 (GR)

A-05 Harness
connector
(harness side)

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-30

YES :

Open or short circuit may be present in the

front right wheel speed sensor circuit.
Repair the wiring harness between
ABS-ECU connector A-03 (terminals 8 and
9) and front left wheel speed sensor A-05
(terminals 2 and 1). Then go to Step 15.

NO :

Repair or replace the damaged
component(s). Then go to Step 15.