2007款豐田凱美瑞制動防抱死（ABS）系統(tǒng)維修手冊

1、2007款豐田凱美瑞制動防抱死ABS系統(tǒng)維修手冊 BC1 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM ANTI-LOCK BRAKE SYSTEM PRECAUTION 1 EXPRESSIONS OF IGNITION SWITCH The type of ignition switch used on this model differs according to the specifications of the vehicle The expressions listed in the table below are used in this sectio

2、n Switch Type Expression Ignition Switch Position Engine Switch Condition Ignition switch off LOCK off Ignition switch on IG ON on IG Ignition switch on ACC ACC on ACC Engine start START start 2 TROUBLESHOOTING PRECAUTION HINT The anti-lock brake system includes the ABS and EBD BC a When there is a

3、malfunction in the terminal contact points or installation problems with parts removing and installing the suspected problem parts may return the system to normal either completely or temporarily b In order to determine the malfunctioning area be sure to check the conditions at the time the malfunct

4、ion occurred such as by the DTC output and the freeze frame data output and record it before disconnecting each connector or removing and installing parts c Be sure to remove and install the brake actuator and each individual sensor with the ignition switch off unless otherwise specified in the insp

5、ection procedure d If the brake actuator or a sensor has been removed and installed it is necessary to check the system for problems after the parts have been reassembled Check for DTCs using the intelligent tester also check that system functions and signals received by the ECU are normal using tes

6、t mode 3 CAN COMMUNICATION SYSTEM PRECAUTION a The CAN communication system is used for data communication between each of the ECUs and sensors If there is trouble in the CAN communication line a DTC of the communication line is output b If a DTC of the CAN communication line is output repair the ma

7、lfunction in the communication line and troubleshoot the anti-lock brake system BC2 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM c In order to enable CAN communication a specific type of wiring is used for the CAN communication lines The wiring used for each communication line is a twisted pair of wires tha

8、t have an equal length A bypass wire should not be used because the data being transmitted will be corrupted BC BC3 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM PARTS LOCATION BRAKE MASTER CYLINDER ASSEMBLY - BRAKE FLUID LEVEL WARNING SWITCH BRAKE ACTUATOR SKID CONTROL SENSOR - SKID CONTROL ECU REAR SPEED S

9、ENSOR REAR SPEED SENSOR ROTOR FRONT SPEED SENSOR ROTOR FRONT SPEED SENSOR ECM 2GR-FE BC FRONT SPEED SENSOR FRONT SPEED SENSOR ROTOR ENGINE ROOM RB ECM SKID CONTROL SENSOR 2AZ-FE - FUSIBLE LINK ABS NO 1 REAR SPEED SENSOR - FUSIBLE LINK ABS NO 2 REAR SPEED SENSOR ROTOR C131985E01 BC4 BRAKE CONTROL ANT

10、I-LOCK BRAKE SYSTEM STOP LIGHT SWITCH COMBINATION METER ASSEMBLY PARKING BRAKE - ABS WARNING LIGHT SWITCH AUTOMATIC - BRAKE WARNING LIGHT TRANSAXLE BC DLC3 INSTRUMENT PANEL JB PARKING BRAKE SWITCH - ECU IG NO 2 FUSE MANUAL TRANSAXLE C131984E01 BC5 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM SYSTEM DIAGRAM

11、Brake Actuator Assembly Skid Control ECU with Actuator Motor Relay Motor Speed Sensor On Each Wheel Solenoid Relay Solenoid Skid Control BC ECU Stop Light Switch Combination Meter Assembly Speedometer ABS Warning Light Parking Brake Switch BRAKE Warning Light Main Body ECU ECM CAN Communication Syst

12、em C131987E01 Transmitting ECU Receiving ECU Signals Communication method ABS warning light signal Skid control ECU Combination meter CAN communication system BRAKE warning light signal BC6 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM Transmitting ECU Receiving ECU Signals Communication method ECM Skid cont

13、rol ECU Shift position signal CAN communication system BC BC7 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM SYSTEM DESCRIPTION 1 SYSTEM DESCRIPTION HINT The skid control ECU is located within the brake actuator assembly a ABS Anti-lock Brake System The ABS helps prevent the wheels from locking when the brake

14、s are applied firmly or when braking on a slippery surface Brake Actuator Assembly Pump Motor BC Each Speed Each Wheel Sensor Cylinder Skid Control ECU Solenoid Valves ABS Warning Light Combination Meter Assembly CAN Communication System Hydraulic Pressure C132003E01 BC8 BRAKE CONTROL ANTI-LOCK BRAK

15、E SYSTEM Operation description The skid control ECU detects wheel lock based on speed signals it receives from the wheel speed sensors Based on this information the skid control ECU controls the pump motor and solenoid valves The pump motor and solenoid valves are used to prevent wheel lock by contr

16、olling the hydraulic pressure applied to the brakes at each wheel The ABS warning light will come on when the system is malfunctioning BC BC9 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM b EBD Electronic Brake force Distribution The EBD control utilizes ABS realizing proper brake force distribution between

17、the front and rear wheels in accordance with driving conditions In addition when braking while cornering it also controls the brake forces of the right and left wheels helping to maintain vehicle behavior Brake Actuator Assembly Pump Motor Each Each Speed Wheel BC Sensor Skid Control ECU Solenoid Va

18、lves BRAKE ABS Warning Warning Light Light Combination Meter Assembly CAN Communication System Hydraulic Pressure C132004E01 BC10 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM Operation description The skid control ECU receives a speed signal from each wheel speed sensor and uses these signals to detect lock

19、ing of the wheels The ECU uses this information in order to determine appropriate control of the solenoid valves The solenoid valves control the hydraulic pressure applied to the brake cylinder at each wheel In this way the solenoid valves are used to control the brake power split between the front

20、and rear and left and right wheels The ABS and BRAKE warning lights come on if there is a malfunction in the EBD system 2 ABS with EBD OPERATION a Based on the signals received from the 4 wheel speed sensors the skid control ECU calculates the deceleration and speed of each wheel while monitoring fo

21、r wheel lock If wheel lock is occurring the ECU controls the solenoid valves in the brake BC actuator in order to adjust the hydraulic pressure applied to the brakes at each wheel 3 FAIL SAFE FUNCTION a When a failure occurs in the anti-lock brake system the ABS warning light comes on and operation

22、is prohibited In addition when a failure which disables EBD operation occurs the brake warning light also comes on and operation is prohibited See page BC-24 4 INITIAL CHECK a When the vehicle speed first becomes approximately 4 mph 6 kmh or more after the ignition switch is turned on IG each soleno

23、id valve and motor of the brake actuator is sequentially activated to perform an electrical check During the initial check the operating sound of solenoid valve and motor can be heard from the engine compartment but this is not a malfunction 5 FUNCTION OF COMPONENTS Components Function Composed of t

24、he holding solenoid valve pressure reduction solenoid valve pump motor reservoir etc and adjusts the Brake actuator assembly hydraulic pressure applied to each wheel cylinder Houses the skid control ECU Skid control ECU Processes the signals sent from each sensor to control ABS and EBD Detects speed

25、 of each wheel and inputs the data into the skid control Speed sensor ECU Master cylinder Generates pressure according to pedal effort Illuminates the stop light when the brake pedal is depressed Sends a Stop light switch brake on signal to the skid control ECU Supplies power to each solenoid Soleno

26、id relay Housed in the skid control ECU Supplies power to the pump motor Motor relay Housed in the skid control ECU Comes on to inform the driver that a malfunction in the ABS and ABS warning light EBD has occurred Blinks to output DTC BC11 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM Components Function Co

27、mes on to inform the driver that the parking brake is on when the system is normal or the brake fluid level has decreased BRAKE warning light Comes on to inform the driver that a malfunction in the EBD has occurred BC BC12 BRAKE CONTROL ANTI-LOCK BRAKE SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING 1 VEHICLE BROUGHT TO WORKSHOP NEXT 2 CUSTOMER PROBLEM ANALYSIS a Interview the customer to confirm the trouble NEXT 3 CHE