Workshop Manual

5A–32
BRAKE CONTROL SYSTEM
Chart A-3, TA-3 The Wheels Are Locked
Step
Action
Yes No
1 Is ABS working? Go to Step 2 Go to Step 4
2 Is vehicle speed under 10 km/h (6mph)? Go to Step 3 Normal.
3 Is sensor output normal? (Chart C-1 or TC-1)
Go to Step 4
Replace sensor
or repair harness.
Go to Step 6
4 Is front TOD control unit normal?
Go to Step 5
Replace TOD
control unit or
repair harness.
Go to
Step 6
5 Is hydraulic unit grounded properly? Replace EHCU.
Go to Step 6
Repair.
Go to Step 6
6 Reconnect all components, ensure all components are properly
mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 6
Chart A-4 Brake Pedal Feed Is Abnormal
Step
Action
Yes No
1 Is the stop light actuated when the brake pedal is depressed? Go to Step 2 Go to Step 3
2 1. Turn the ignition switch off.
2. Disconnected EHCU connector.
Is the check voltage EHCU connector terminals 13 to 7 when
brake pedal is depressed than battery voltage?
Go to Step 4
Harness NG
between brake
SW and EHCU.
Go to
Step 6
3 Is stop light fuse normal?
Go to Step 5
Replace stop light
fuse.
Go to Step 6
4 Is the check continuity between EHCU connector terminals, 7 to
body grounded?
Go to Step 6
Repair body
grounded
harness.
Go to Step 6
5 Is brake SW normal? Repair stop light
harness.
Go to
Step 6
Replace brake
SW.
Go to
Step 6
6 Reconnect all components, ensure all components are properly
mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 6