Precaution - Mazda 2002 6 Workshop Manual

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)
13 DLC-2
14 CAN-H
15 CAN-L
16 Wheel-speed sensor
17 Combine sensor
18 Steering angle sensor
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FOREWORD
• Before performing the steps in Symptom Troubleshooting, perform the On-board Diagnostic Inspection. To
check the DTC, follow the DTC Inspection steps.
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PRECAUTION

Vehicles with ABS/TCS
1. The ABS warning light, BRAKE system warning light, TCS indicator light and/or TCS OFF light illuminate even
when the system is normal.
Warning lights that may
illuminate and/or flash
Any or all the following light(s)
illuminate:
• ABS warning light
• BRAKE system warning
*1
light( )
All the following lights
illuminate:
• ABS warning light
• BRAKE system warning
light
*
1 : In cases where the light may illuminate, only when ABS/TCS HU/CM detects that speed sensor of rear wheel
is malfunctioning.
*
2 : If battery voltage drops below 9 V while vehicle speed is greater than 6 km/h{3.7mph}, ABS HU/CM records
DTC B1318.
Cases in which the light may
illuminate
Under any of the following
conditions:
• When the front wheels are
jacked up, stuck, or placed
on a chassis roller, and
only the front wheel ABS
wheel speed sensors are
spun for more than 60
seconds.
Parking brake is not fully
released while driving.
Brake drag.
Sudden acceleration/
deceleration.
Left/right or front/rear tires are
different. (Size, radius, tire
pressure, or wear is other than
that listed on tire label.)
Battery voltage at ABS-TCS
HU/CM ignition terminal Z
drops below about 9 to 10
*2
V.( )
19 Brake switch
20 Brake light
21 Back-up light switch (MTX only)
22 Back-up light
23 Audio unit, Wiper and washer switch,
Car-navegation unit, Auto leveling control unit
Conditions in which the
light will go out
After turning ignition switch
OFF, vehicle is driven at
speed greater than 10 km/h
{6.2 mph} and normal
operation is confirmed.
Battery voltage rises abobe
about 10 V.
(Only BRAKE system warning
light goes out.)
A6E699067650W02
A6E699067650W03
ABS, EBD, TCS and DSC
control
• ABS: Cuts control.
• EBD:
1. Cuts control, in cases
where the light may
illuminate, only when ABS
CM detects that a wheel
speed sensor determines
that more than the two rear
wheels are malfunctioning.
2. Operates control, if wheel
speed sensor determines
that more than 3 wheels
are functioning correctly.
ABS: Operates control.
EBD: Operates control.
P–99
P