Mitsubishi 380. Manual - part 951

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-29

STEP 3. Using diagnostic tool MB991958, read the 
diagnostic trouble code.

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.
Use diagnostic tool MB991958 to check whether DTC codes 
C1200, C1205, C1210 and C1215 have been set simulta-
neously.
(1) Connect diagnostic tool MB991958 to the data link 

connector.

(2) Turn the ignition switch to the "ON" position.
(3) Check whether DTC C1200, C1205, C1210 or C1215 have 

been set.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC C1200, C1205, C1210 or C1215 set?

YES : Carry out diagnosis relevant to DTC C1200, C1205, 

C1210 or C1215 (Refer to 

P.35B-10

).

NO :  Go to Step 4.

STEP 4. Check the installation condition of the wheel 
speed sensors.
For the wheel speed sensor, which the DTC code indicates, 
check whether the sensor or its mounting bolts are loosened.

• DTC C1201 is set: Front right wheel speed sensor

• DTC C1206 is set: Front left wheel speed sensor

• DTC C1211 is set: Rear right wheel speed sensor

• DTC C1216 is set: Rear left wheel speed sensor

Q: Is the wheel speed sensor installed correctly?

YES : Go to Step 5.
NO :  Reinstall the wheel speed sensor correctly. Then go 

to Step 16.

STEP 5. Check the wheel speed sensor after it is removed 
from the vehicle.
Check the wheel speed sensor which the DTC code indicates 
(Refer to 

P.35B-96

).

• DTC C1201 is set: Front right wheel speed sensor

• DTC C1206 is set: Front left wheel speed sensor

• DTC C1211 is set: Rear right wheel speed sensor

• DTC C1216 is set: Rear left wheel speed sensor

Q: Is the wheel speed sensor in good condition?

YES : Go to Step 6.
NO :  Replace the wheel speed sensor (Refer to 

P.35B-95

). 

Then go to Step 16.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-30

STEP 6. Check the wheel bearing for looseness.

NOTE: If the wheel bearing is loose, the gap between the 
wheel speed sensor and rotor may become excessive. Check 
the wheel bearing, which DTC code indicates, for looseness.

• DTC C1201 is set: Check the front right wheel bearing 

(Refer to GROUP 26, On-vehicle service 

− Wheel bearing 

end play check 

P.26-8

).

• DTC C1206 is set: Check the front left wheel bearing (Refer 

to GROUP 26, On-vehicle service 

− Wheel bearing end play 

check 

P.26-8

).

• DTC C1211 is set: Check the rear right wheel bearing 

(Refer to GROUP 27, On-vehicle service 

− Wheel bearing 

end play check 

P.27-4

).

• DTC C1216 is set: Check the rear left wheel bearing (Refer 

to GROUP 27, On-vehicle service 

− Wheel bearing end play 

check 

P.27-4

)

Q: Is the wheel bearing end play within the standard value?

YES : Go to Step 7.
NO (front bearing end play is not within the standard 
value) : Replace the front hub assembly (Refer to GROUP 

26, Front axle hub assembly 

P.26-9

).

NO (rear bearing end play is not within the standard 
value) : Replace the rear hub assembly (Refer to GROUP 

27, Rear axle hub assembly 

P.27-4

).

STEP 7. Check the wheel speed rotor.
Check the wheel speed rotor, which DTC code indicates, for 
foreign material or deformation.

• DTC C1201 is set: Front right wheel speed sensor

• DTC C1206 is set: Front left wheel speed sensor

• DTC C1211 is set: Rear right wheel speed sensor

• DTC C1216 is set: Rear left wheel speed sensor

Q: Is the wheel speed rotor in good condition?

YES : Go to Step 8.
NO (front bearing end play is not within the standard 
value) : If the wheel speed rotor is contaminated with 

foreign material, clean it.  If the driveshaft is 
deformed, replace it (Refer to GROUP 26, Drive shaft 
assembly 

P.26-13

).

NO (rear bearing end play is not within the standard 
value) : If the wheel speed rotor is contaminated with 

foreign material, clean it.  If the wheel speed rotor is 
deformed, replace it (Refer to GROUP 27, Rear axle 
hub assembly 

P.27-6

).

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-31

STEP 8. Check ABS-ECU connector A-02 and wheel speed 
sensor <front: RH> connector A-01 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

NOTE: The special tool (Inspection test harness) MB991219 
for connector pin contact pressure should be used. The test 
probe should never be forcibly inserted, as it may cause a 
defective contact.

              SIGNAL

   TERMINAL  NO.

  NORMAL CONDITION

 ABS (A-02)

   SENSOR

FR wheel speed sensor  
(A-01)

9

2

Less than 2 ohms

10

1

Less than 2 ohms

RR wheel speed sensor  
(D-30)

8

1

Less than 2 ohms

19

2

Less than 2 ohms

FL wheel speed sensor   
(A-04)

16

2

Less than 2 ohms

5

1

Less than 2 ohms

RL wheel speed sensor   
(D-31)

6

1

Less than 2 ohms

17

2

Less than 2 ohms

ABS-ECU
 CONNECTOR
 (A-02)

Supply

Signal

WHEEL SPEED
    SENSOR

Wheel speed 
sensor connectors:
A-04,  A-01,  D-31,  D-30

Terminals:
 5, 10, 17, 19

35DB123A

Terminals:
 16, 9, 6, 8

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-32

Q: Are ABS-ECU connector A-02 and wheel speed sensor 

<front: RH> connector A-01 damaged?
YES : Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 13.

NO :  Open or short circuit may be present in the front right 

wheel speed sensor circuit. Repair the wiring harness 
between ABS-ECU connector A-02 (terminals 9 and 
10) and front right wheel speed sensor A-01 
(terminals 2 and 1).Then go to Step 13.

AC305206

A-01 (B)

CONNECTOR: A-01

AV

A-01 HARNESS
CONNECTOR
(HARNESS SIDE)

2 1