Page 32 - Workshop Manual - Aumark (BJ1051)

01-26
Introduction-How to Troubleshoot the Vehicle
Circuit Inspection

The following table shows you the way to read and use the circuit inspection section in this manual.

Descriptions of malfunction blink codes and diagnostic trouble codes

Description
Descriptions are made based on circuit
f eatures, diagnostic flows, and parts
and components.

5-1 ABS Sensor Signal Unstable (Right Front Wheel) Circuit diagram
5-2 ABS Sensor Signal Unstable (Right Front Wheel)
5-3 ABS Sensor Signal Unstable (Right Front Wheel)
5-4 ABS Sensor Signal Unstable (Right Front Wheel) ABS control unit B014
brown brown
Tip: Left front
wheel speed
Since the 4 ABS sensors use same control mode, the diagnostic sensor black black
procedure for ABS sensors of left front, right rear, and left rear brown brown
wheels is the same as that for the sensor of right front wheel. Right front wheel speed
sensor
01 A002 black black
Description
brown brown
1. Speed sensor detects wheel Left rear wheel speed
sensor
black
speed and transmits signals to A006 black Black
black
speed sensor
Rotor magnet ECU. These signals are used
coil to ABS to control ABS control system. brown brown
Both front and rear rotors are Right rear wheel speed
low speed provided with a serration. sensor black
A008
High speed black
2. When a rotor rotates, the
magnetic field formed by the
permanent magnet on the
speed sensor will generate an
alternating voltage.
3. Frequency changes of this
alternating voltage is directly
proportional to rotor speed, so
ECU can use this frequency to
detect speed of each wheel.
Diagnostic procedure
Circuit diagram 1. Checking (right) front wheel
To distinguish and
identify a large number of (a) Check if (right) front wheel size is within
electric wires, each wire specifications.
is marked with either (b) Check (right) front wheel rim for deformation.
monocolor or bicolor for (c) Check (right) front wheel steering knuckle
your reference. lock nut for looseness.
(d) Check (right) front wheel bearing for
Diagnostic procedure looseness.
It comprises caption,
description and judgment Is diagnosis result normal?
of a diagnostic procedure. Yes > Go to step 2.
No > Adjust, repair, or replace loose, deformed, and
damaged parts and components.

Page 32