Mitsubishi Outlander (2003+). Manual — part 269

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-19

Q: Is the harness wire between junction block

connector C-203 terminal 2 and ABS-ECU
connector B-03 terminal 20 damaged?

YES :

Repair it and go to Step 4.

NO :

Erase the diagnosis code memory, and
recheck if any diagnosis code sets. If
diagnosis code No.16 sets, replace the
hydraulic unit (integrated with ABS-ECU)
and then go to Step 4 . If diagnosis code
No.16 is not set then an intermittent
malfunction is suspected. Refer to GROUP
00, How to Use Troubleshooting/Inspection
Service Points

−

How to Cope with

Intermittent Malfunction

P.00-6

.

STEP 4. Check whether the diagnosis code is
reset.

Q: Is diagnosis code No.16 set?

YES :

Start over at Step 1.

NO :

The procedure is complete.

Code No.21, 22, 23, 24: ABS Sensor

ABS SENSOR

(FRONT: LH)

(FRONT: RH)

(REAR: LH)

(REAR: RH)

ABS-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

AC301686AB

ABS Sensor Circuit

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-20

OPERATION

•

A toothed ABS rotor generates a voltage pulse as
it moves across the pickup field of each ABS
sensor.

•

The amount of voltage generated at each wheel
is determined by the clearance between the ABS
rotor teeth and the ABS sensor, and by the speed
of rotation.

•

The ABS sensors transmit the frequency of the
voltage pulses and the amount of voltage
generated by each pulse to the ABS-ECU.

•

The hydraulic unit modulates the amount of
braking force individually applied to each wheel
cylinder.

DIAGNOSIS CODE SET CONDITIONS
Diagnosis codes No.21, 22, 23 and 24 are set in the
following cases:

•

Open circuit is not found but no input is received
by one or more of the four ABS sensors at 10
km/h or more.

•

ABS sensor output drops due to a malfunctioning
ABS sensor or warped ABS rotor.

PROBABLE CAUSES
The most likely causes for these diagnosis codes to
set are:

•

Malfunction of the ABS sensor

•

Damaged wiring harness or connector

•

Malfunction of the hydraulic unit (integrated with
ABS-ECU)

•

Malfunction of the ABS rotor

•

Malfunction of the wheel bearing

•

Excessive clearance between the ABS sensor
and ABS rotor

•

Teeth lack or clogging of the ABS rotor

DIAGNOSIS

STEP 1. MUT-II/III data list

Set MUT-II/III to data reading mode, and check the
data list items by driving the vehicle.

•

Item 01: Front right ABS sensor

•

Item 02: Front left ABS sensor

•

Item 03: Rear right ABS sensor

•

Item 04: Rear left ABS sensor

OK: The reading on the speedometer nearly
matches the indication on MUT-II/III, when
driving.

Q: Is the ABS sensor input normal?

YES :

This malfunction is intermittent. Refer to

GROUP 00, How to Use
Troubleshooting/Inspection Service Points

−

How to Cope With Intermittent Malfunction

P.00-6

.

NO :

Go to Step 2.

STEP 2. Check the ABS sensor installation.

Q: Is the ABS sensor bolted securely in place at the

front knuckle <front> or the trailing arm <rear>?

YES :

Go to Step 3.

NO :

Install it properly (Refer to

P.35B-67

) and go

to Step 11 .

STEP 3. Inspect the ABS sensor and ABS rotor.

Refer to

P.35B-68

.

Check items:

•

ABS sensor internal resistance: 1.24

−

1.64 k

Ω

•

Insulation between the ABS sensor body and the
connector terminals

•

Toothed ABS rotor check

Q: Is the ABS sensor or ABS rotor damaged?

YES :

Replace it and then go to Step 11.

NO :

Go to Step 4.

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-21

STEP 4. Resistance measurement at the
ABS-ECU connector B-03.

(1) Disconnect ABS-ECU connector B-03 and

measure at the harness side.

(2) Measure the resistance between ABS-ECU

connector terminals 16 and 26, 9 and 10, 11 and
17, or 27 and 28.

Standard Value: 1.24

−

1.64 k

Ω

Q: Is the resistance between terminals 16 and 26, 9

and 10, 27 and 28, or 11 and 17 within the standard
value?

When resistances between all terminals are within
the standard value :

Go to Step 9.

When resistance between terminals 16 and 26 is
not within the standard value :

Go to Step 5.

When resistance between terminals 9 and 10 is not
within the standard value :

Go to Step 6.

When resistance between terminals 27 and 28 is
not within the standard value :

Go to Step 7.

When resistance between terminals 11 and 17 is
not within the standard value :

Go to Step 8.

STEP 5. Check the harness wires between
ABS-ECU connector B-03 (terminals 16 and 26)
and ABS sensor <front: LH> connector A-13
(terminals 1 and 2).

AC301441AB

Connector: B-03

B-03 (GR)

Harness side

AC301683

Connector B-03
(harness side)

AB

AC301443AB

Connector: A-13

A-13 (B)

Harness side

AC301441AB

Connector: B-03

B-03 (GR)

Harness side

TROUBLESHOOTING

ANTI-SKID BRAKING SYSTEM (ABS)

35B-22

NOTE:

After inspecting ABS-ECU connector B-03,
intermediate connector A-14 and ABS sensor <front:
LH> connector A-13, inspect the wire. If any of these
connectors is damaged, repair or replace it. Then go
to Step 11.

Q: Is any harness wire between ABS-ECU connector

B-03 (terminals 16 and 26) and ABS sensor <front:
LH> connector A-13 (terminals 1 and 2) damaged?

YES :

Repair it and go to Step 11.

NO :

This malfunction is intermittent. Refer to
GROUP 00, How to Use
Troubleshooting/Inspection Service Points

−

How to Cope With Intermittent Malfunction

P.00-6

.

STEP 6. Check the harness wires between
ABS-ECU connector B-03 (terminals 10 and 9)
and ABS sensor <front: RH> connector A-31
(terminals 1 and 2).

AC308679 AG

A-14(GR)

Connector: A-14 <LHD>

AC308686AH

A-14(GR)

Connector: A-14
<RHD>

AC301444AB

Connector: A-31

A-31 (B)

Harness side

AC301441AB

Connector: B-03

B-03 (GR)

Harness side