Infiniti I35 (A33). Manual - part 113
TCS (Traction Control System) Operation
=NHBR0145
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This system is designed to limit wheel slip during acceleration by cutting fuel to selected cylinders and
changing transmission shift schedule.
The ABS/TCS control unit monitors wheel speed slips through the ABS wheel sensors and determines the
desired torque reduction needed to minimize wheel spin.
The torque reduction by the ABS/TCS control unit may result in a combination of fuel cutoff, throttle control,
and change shift timing of the transmission.
The torque reduction is sent from the ABS/TCS control unit through the data link to the ECM and TCM.
The ECM will cut off fuel and/or close throttle valve little bit, and/or TCM change shift schedule to achieve
torque reduction.
The TCS will be enabled when the TCS switch is in the ON position (TCS OFF indicator not illuminated),
and if the catalytic converter temperature is within normal operating range.
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This system has a self-diagnostic function. When the ignition switch is initially turned “ON”, the SLIP indi-
cator lamp and TCS OFF indicator lamp light. If there is no problem with the ABS and TCS, both indica-
tor lamps will go out as soon as the engine starts.
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The TCS OFF switch cancels the TCS function. The TCS OFF indicator lamp then lights to indicate that
the TCS is not operating.
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This system utilizes a fuel-cut function to control drive torque. If fuel cut continues for an extended period
of time during high-speed operations, the catalyst may melt and deteriorate. During continued TCS
operations, the system will sometimes suspend the drive torque control function, preventing catalyst melt-
ing and deterioration.
System Components
NHBR0146
SBR039F
GI
MA
EM
LC
EC
FE
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
DESCRIPTION
TCS
TCS (Traction Control System) Operation
BR-37