Nissan 350Z Workshop Manual 2003 (9) PDF | Page 48

BRC-48
[TCS/ABS]
SYSTEM DESCRIPTION
TCS Function
AFS000YP
? The wheel spin occurrence of the drive wheels is detected by the ABS actuator and electric unit using the
wheel speed signals from all four wheels, so when wheel spin occurs, the amount of wheel spin is
reduced by controlling the hydraulic brakes on the right and left rear wheels, cutting the fuel to the engine,
and partially closing the throttle valve to reduce the engine torque. The throttle opening is also controlled
to obtain the optimum engine torque.
? Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.
? TCS may be activated any time the vehicle suddenly accelerates, suddenly downshifts, or is driven on a
road with a varying surface friction coefficient.
? During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
ABS Function AFS000YQ
? The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves
handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.
? If the electrical system breaks down, then the Fail-Safe function starts, the ABS becomes inoperative,
and the ABS warning lamp turns on.
? Electrical System Diagnosis by CONSULT-II is available.
EBD Function AFS0010E
? Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure
which results in reduced rear wheel slippage.
? In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomes
inoperative, and the ABS warning lamp and brake (EBD) warning lamp are turned on.
? Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe Function AFS000YR
TCS SYSTEM
In case of Throttle Control System trouble, the TCS OFF indicator lamp and SLIP indicator lamp are turned on,
and the condition of the vehicle is the same as the condition of vehicles without TCS equipment. In case of
trouble to the Throttle Control System, the ABS control continues to operate normally without TCS control.
CAUTION:
If the Fail-Safe function is activated, then perform the Self Diagnosis for TCS/ABS control system.
ABS, EBD SYSTEM
In case of electrical problems with the ABS, the ABS warning lamp, TCS OFF indicator lamp and SLIP indica-
tor lamp will turn on. In case of electrical problem with the EBD, Brake (EBD) warning lamp, ABS warning
lamp, TCS OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the TCS/ABS become
one of the following conditions of the Fail-Safe function.
1. For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
cles without TCS/ABS equipment.
2. For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
the condition of vehicles without TCS/ABS, EBD equipment.
NOTE:
In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal condition
because a self diagnosis for ?Key Switch ON? and ?the First Starting? are being performed.
11. Wheel speed sensor (RL) 12. Combination meter
[Brake (EBD) warning lamp,
ABS warning lamp,
TCS OFF indicator lamp,
SLIP indicator lamp]
13. Engine
14. TCM 15. Electric controlled throttle 16. Throttle operation signal
17. Injector operation signal 18. CAN

Summary of Content

BRC-48[TCS/ABS]SYSTEM DESCRIPTIONTCS FunctionAFS000YP The wheel spin occurrence of the drive wheels is detected by the ABS actuator and electric unit using thewheel speed signals from all four wheels, so when wheel spin occurs, the amount of wheel spin isreduced by controlling the hydraulic brakes on the right and left rear wheels, cutting the fuel to the engine,and partially closing the throttle valve to reduce the engine torque. The throttle opening is also controlledto obtain the optimum engine torque. Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-mum traction has the highest priority under TCS operation. TCS may be activated any time the vehicle suddenly accelerates, suddenly downshifts, or is driven on aroad with a varying surface friction coefficient. During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.ABS Function AFS000YQ The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improveshandling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is alsoimproved for avoiding obstacles. If the electrical system breaks down, then the Fail-Safe function starts, the ABS becomes inoperative,and the ABS warning lamp turns on. Electrical System Diagnosis by CONSULT-II is available.EBD Function AFS0010E Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheelsduring braking, and it improves handling stability by electronically controlling the Brake Fluid Pressurewhich results in reduced rear wheel slippage. In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomesinoperative, and the ABS warning lamp and brake (EBD) warning lamp are turned on. Electrical System Diagnosis by CONSULT-II is available.Fail-Safe Function AFS000YRTCS SYSTEMIn case of Throttle Control System trouble, the TCS OFF indicator lamp and SLIP indicator lamp are turned on,and the condition of the vehicle is the same as the condition of vehicles without TCS equipment. In case oftrouble to the Throttle Control System, the ABS control continues to operate normally without TCS control.CAUTION:If the Fail-Safe function is activated, then perform the Self Diagnosis for TCS/ABS control system.ABS, EBD SYSTEMIn case of electrical problems with the ABS, the ABS warning lamp, TCS OFF indicator lamp and SLIP indica-tor lamp will turn on. In case of electrical problem with the EBD, Brake (EBD) warning lamp, ABS warninglamp, TCS OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the TCS/ABS becomeone of the following conditions of the Fail-Safe function.1. For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-cles without TCS/ABS equipment.2. For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same asthe condition of vehicles without TCS/ABS, EBD equipment.NOTE:In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal conditionbecause a self diagnosis for Key Switch ON and the First Starting are being performed.11. Wheel speed sensor (RL) 12. Combination meter[Brake (EBD) warning lamp,ABS warning lamp,TCS OFF indicator lamp,SLIP indicator lamp]13. Engine14. TCM 15. Electric controlled throttle 16. Throttle operation signal17. Injector operation signal 18. CAN