DESCRIPTION
Depending on the malfunction, the skid control ECU (brake actuator assembly) prohibits operation of the vehicle stability control system to protect components and prevent incorrect operation when DTCs are stored.
If the switching solenoid is disabled due to prohibition of the vehicle stability control system, the response of the brake pedal changes and braking performance is reduced.
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform system variant learning.
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PROCEDURE
1. |
BRAKE PROBLEM CHECK |
(a) Check the conditions at the time the problem occurred.
(1) Whether a warning light illuminated or the buzzer sounded.
(2) Road surface condition when the problem occurred and just before the problem occurred.
(3) When the problem occurred and how many times the brake pedal was depressed before the problem occurred.
(4) Frequency of the abnormal brake pedal response.
|
2. |
CHECK DTC AND FREEZE FRAME DATA |
(a) Using the Techstream, check DTCs and Freeze Frame Data.
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Chassis > ABS/VSC/TRAC/EPB > Trouble Codes
Result |
Proceed to |
---|---|
DTCs are not output. |
A |
DTCs are output. |
B |
HINT:
B |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
3. |
CHECK BRAKE PEDAL |
(a) While depressing the brake pedal by hand, check the installation condition of the brake pedal stroke sensor assembly and brake pedal, and check for mechanical malfunctions.
(b) Check and adjust the brake pedal height.
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|
4. |
INSPECT BRAKE ACTUATOR ASSEMBLY |
(a) Check the brake actuator assembly.
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OK:
The brake actuator assembly is normal.
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE BRAKE ACTUATOR ASSEMBLY |
Toyota CH-R Service Manual > Parking Brake: Parking Brake System
Precaution
PRECAUTION
IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
...
Toyota CH-R Service Manual > Lighting System: Low Beam Headlight Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the low beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses and bulbs for circuits related to this system before
performing the following procedure.
Before replacing the main body ...