Workshop Manual

5A–33
BRAKE CONTROL SYSTEM
Chart A-5, TA-5 Braking Sound (From EHCU) Is Heard While Not Braking
Step
Action
Yes No
1 Is this the first vehicle start after engine start? Normal.
(It is self
checking sound.)
Go to Step 2
2 Is vehicle speed under 10 km/h (6 mph)? Normal.
(It is self
checking sound.)
Go to Step 3
3 Check for the following condition:
B At the time of shift down or clutch operation.
B At the time of low road friction drive (ice or snow road) or rough
road drive.
B At the time of high-speed turn.
B At the time of passing curb.
B At the time of operating electrical equipment switches.
B At the time of racing the engine (over 5000 rpm).
Did it occur under any one condition above?
ABS may
sometimes be
actuated even
when brake pedal
is not applied.
Go to Step 4
4 Is there play in each or any sensor/wheel speed sensor rings? Repair.
Go to
Step 7
Go to Step 5
5 Damage or powdered iron sticking to each or any sensor/wheel
speed sensor ring?
Repair.
Go to Step 7
Go to Step 6
6 Is each sensor output normal? (Refer to Chart C-1 or TC-1 ). Check harness/
connector for
suspected
disconnection
If no
disconnection is
found, replace
Coil integrated
module.
Go to Step 7
Repair.
Go to
Step 7
7 Reconnect all components, ensure all components are properly
mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 7