Mitsubishi 380. Manual — part 953

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-37

STEP 11. Check ABS-ECU connector A-02, intermediate
connector C-25 and wheel speed sensor <rear: LH>
connector D-31 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-38

Q: Are ABS-ECU connector A-02, intermediate connector

C-25 and wheel speed sensor <rear: LH> connector
D-31 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 rear left

wheel speed sensor circuit. Repair the wiring harness
between ABS-ECU connector A-02 (terminals 17 and
6) and rear left wheel speed sensor D-31 (terminals 2
and 1).Then go to Step 13.

STEP 12. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC C1201, C1206, C1211 or C1216 set?

YES : Replace the hydraulic unit (integrated with

ABS-ECU). Then go to Step 13.

NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunction

P.00-14

.

35DB033A

CONNECTOR: C-25

C-25

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-39

STEP 13. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Turn the ignition switch to the "ON" position.
(5) Check if the DTC is set.
(6) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC C1201, C1206, C1211 or C1216 set?

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

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-40

DTC C1225: Deviation between wheel speeds.

NOTE: If DTC C1225 is set, it is more likely to be set
togethor with other codes

P.35B-26

and it too will

look for a variation in wheel speeds which do not
meet required specification. It will, in most cases be
set whenever a "plausibility" or an abnormal wheel
speed output signal is created. Refer to

P.35B-26

.

NOTE: It is possible for DTC 1225 to be logged by
itself, for example "during extended wheel spin". If
this were the case, it would only be a history code
and no action is necessary.