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Daewoo Matiz (2003 year). Manual - part 149

ANTILOCK BRAKE SYSTEM 4F – 45

DTC 0504 – Right Rear Wheel Speed Sensor Circuit Open or 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 voltage between terminal 2 of the
connector C202 and terminal 2 of the right 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 2 of the connector C202 and terminal 9
of the EBCM connector.

Is the voltage within the specified value?

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0 v

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Go to Step 26

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Go to Step 25

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Repair the short to voltage between terminal 2 of the
connector C202 and terminal 9 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 10 of the connector C202.

Is the voltage within the specified value?

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0 v

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Go to Step 28

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Go to Step 27

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Repair the short to voltage between terminal 10 of
the connector C202 and terminal 1 of the right 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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–

4F – 46 ANTILOCK BRAKE SYSTEM

D17E304B

DIAGNOSTIC TROUBLE CODE (DTC) 0505

RIGHT REAR WHEEL SPEED SENSOR POOR

AIR GAP OR MISSING TOOTH RING

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 checks for the right rear wheel speed equal to 0
km/h (0 mph) for greater than 6 km/h (3.8 mph).

Cause(s)

The tooth ring is missing.

The air gap exceeds the required specifications.

Fail Action

This is a critical operational fault. The ABS is disabled
and the ABS warning lamp is turned on. The proportion-
ing 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
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

ANTILOCK BRAKE SYSTEM 4F – 47

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 0505 – Right 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 – 48 ANTILOCK BRAKE SYSTEM

D17E304B

DIAGNOSTIC TROUBLE CODE (DTC) 0506

RIGHT REAR WHEEL SPEED SENSOR CIRCUIT

INTERMITTENT SHORTED

Circuit Description

Diagnosis

This test intermittent the right 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.

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

Content .. 147 148 149 150 ..