Daewoo Matiz (2003 year). Manual - part 147

ANTILOCK BRAKE SYSTEM 4F – 37

sensor. Refer to “Rear Wheel Speed Sensor” in this sec-
tion.

Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturb

any electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.

DTC 0455 – Left Rear Wheel Speed Sensor poor air Gap or Missing Tooth Ring

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Step

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Action

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Value(s)

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Yes

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1. Turn the ignition switch to OFF.
2. Physically inspect the following components for

damage.

Wheel speed sensor is loose.

The air gap exceeds the required specifica-
tions.

The speed ring is missing or damaged.

3. Repair or replace the damaged.
Is the repair complete?

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System OK

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Go to Step 2

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Replace the EBCM.
Is the repair complete?

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–

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System OK

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–

4F – 38 ANTILOCK BRAKE SYSTEM

D17E303B

DIAGNOSTIC TROUBLE CODE (DTC) 0456

LEFT REAR WHEEL SPEED SENSOR CIRCUIT

INTERMITTENT SHORTED

Circuit Description

As a toothed ring passes by the wheel speed sensor,
changes in the electromagnetic field cause the wheel
speed sensor to produce a sinusoidal (AC) voltage sig-
nal whose frequency is proportional to the wheel speed.
The magnitude of this signal is directly related to wheel
speed and the proximity of the wheel speed sensor to
the toothed ring often referred to as the air gap.

Diagnosis

This test intermittent the left rear wheel speed sensor
circuit.

Cause(s)

The wheel speed sensor is intermittent shorted to the
battery or ground.

There is a loose connection in the wheel speed sen-
sor circuit.

There is a loose connection in the EBCM.

The EBCM is malfunctioning.

Fail Action

This is a critical operational fault. The ABS is disabled
and the ABS warning lamp repeat intermittent turned on,
and off. The proportioning is operation.

Diagnostic Aids

An ‘‘intermittent’’ malfunction may be caused by a poor
connection, rubbed through wire insulation, or a wire
that is broken inside the insulation.

Thoroughly check any circuitry suspected of causing the
intermittent complaint. Look for backed out terminals,
improper mating, broken locks, improperly formed or
damaged terminals, poor terminal to wiring connections,
or physical damage to the wiring harness.

Wheel speed sensor resistance will increase as the sen-
sor temperature increases.

When replacing a wheel speed sensor, inspect the sen-
sor terminals and harness connector for corrosion and/
or water intrusion. If evidence of corrosion or water

ANTILOCK BRAKE SYSTEM 4F – 39

intrusion exists, replace the wheel speed sensor har-
ness. If replacing a wheel speed sensor harness, in-
spect the sensor terminals. If you find evidence of
corrosion or water intrusion, replace the wheel speed
sensor. Refer to “Rear Wheel Speed Sensor” in this sec-
tion.

Important: Wheel speed sensor intermittent malfunc-
tions may be difficult to locate. Take care not to disturb
any electrical connections before performing an indi-
cated step of this table. That will ensure that an intermit-
tent connection will not be corrected before the source
of the malfunction is found.

DTC 0456 – Left Rear Wheel Speed Sensor Circuit Intermittent Shorted

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Step

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Action

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Value(s)

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Yes

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1. Turn the ignition switch to OFF.
2. Disconnect the EBCM harness connector from

the EBCM.

3. Use a digital voltmeter (DVM) to measure the

resistance between terminals 22 and 23 of
connector on the EBCM harness.

Is the resistance within the specified value?

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1.0 k

1.5 k

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Go to Step 4

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Go to Step 2

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1. Disconnect the harness from the left rear wheel

speed sensor.

2. Use a DVM to measure the resistance between

terminals 1 and 2 of the left rear wheel speed
sensor connector.

Is the resistance within the specified value?

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1.0 k

1.5 k

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Go to Step 4

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Go to Step 3

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Replace the wheel speed sensor.
Is the repair complete?

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–

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System OK

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–

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Use a DVM to measure the resistance between
ground and terminal 22 of the EBCM connector.
Does the DVM show the specified value?

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Go to Step 6

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Go to Step 5

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Repair the short to ground between terminal 7 of the
connector C202 and terminal 22 of the EBCM con-
nector.
Is the repair complete?

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–

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System OK

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–

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Use a DVM to measure the resistance between
ground and terminal 7 of the connector C202.
Does the DVM show the specified value?

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Go to Step 8

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Go to Step 7

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Repair the short to ground between terminal 7 of the
connector C202 and terminal 2 of the left rear wheel
speed sensor harness connector.
Is the repair complete?

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–

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System OK

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–

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Use a DVM to measure the resistance between
ground and terminal 23 of the EBCM connector.
Does the DVM show the specified value?

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Go to Step 10

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Go to Step 9

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Repair the short to ground between terminal 14 of
the connector C202 and terminal 23 of the EBCM
connector.
Is the repair complete?

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–

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System OK

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–

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Use a DVM to measure the resistance between
ground and terminal 14 of the connector C202.
Does the DVM show the specified value?

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Go to Step 12

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Go to Step 11

4F – 40 ANTILOCK BRAKE SYSTEM

DTC 0456 – Left Rear Wheel Speed Sensor Circuit Intermittent Shorted (Cont’d)

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Step

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Action

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Value(s)

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Yes

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Repair the short to ground between terminal 14 of
the connector C202 and terminal 1 of the left rear
wheel speed sensor harness connector.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition switch to ON.
2. Use a DVM to measure the voltage between

ground and terminal 22 of the EBCM connector.

Is the voltage within the specified value?

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0 v

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Go to Step 14

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Go to Step 13

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Repair the short to voltage between terminal 7 of the
connector C202 and terminal 22 of the EBCM con-
nector.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition switch to ON.
2. Use a DVM to measure the voltage between

ground and terminal 7 of the connector C202.

Is the voltage within the specified value?

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0 v

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Go to Step 16

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Go to Step 15

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Repair the short to voltage between terminal 7 of the
connector C202 and terminal 2 of the left rear wheel
speed sensor harness connector.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition switch to ON.
2. Use a DVM to measure the voltage between

terminal 14 of the connector C202 and terminal
23 of the EBCM connector.

Is the voltage within the specified value?

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0 v

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Go to Step 18

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Go to Step 17

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Repair the short to voltage between terminal 14 of
the connector C202 and terminal 23 of the EBCM
connector.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition switch to ON.
2. Use a DVM to measure the voltage between

ground and terminal 14 of the connector C202.

Is the voltage within the specified value?

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0 v

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Go to Step 20

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Go to Step 19

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Repair the short to voltage between terminal 14 of
the connector C202 and terminal 1 of the left rear
wheel speed sensor harness connector.
Is the repair complete?

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–

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System OK

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–

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Replace the EBCM.
Is the repair complete?

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–

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System OK

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–

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