Mazda 2006 MX-5 Service Highlights page 330

SELECTOR INDICATOR LIGHT CONSTRUCTION/OPERATION [SJ6A-EL]
Construction
• The selector indicator light is built into the instrument cluster.
• When in the P, R, N or D range, the TCM detects the selector lever position based on an analog signal from the
TR switch. When in the M range, the TCM detects the selector lever position based on a signal from the M
range switch inside the selector lever component.
• When the instrument cluster receives a range signal or a gear position signal from the TCM via CAN
communication, the selector lever position and the gear position indicator lights illuminate or flash accordingly.
Operation
Gear position indicator light flash
• When the driver's down-shift operation is cancelled, the gear position indicator light flash twice.
— When the TCM cancels a shift operation, all of the signals are pulsed ON/OFF and when finally input to the
instrument cluster, the on signal (ex. M1 signal when in 1GR) and the remaining three off signals (M2, M3,
M4, M5, M6) are reversed to off and on signals respectively.
• Based on a combination of input signals from the TCM, the instrument cluster determines the gear number
(1GR displayed as "1"), and flashes the gear position number in the gear position indicator light and the
selector indicator "M" light.
INSTRUMENT CLUSTER
SELECTOR
INDICATOR LIGHT
P
R
N
D
M
1
GEAR POSITION INDICATOR LIGHT
*:
ABOVE DIAGRAM SHOWS FLASHING WHEN IN 1GR
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TORQUE CONVERTER CLUTCH (TCC) CONTROL OUTLINE [SJ6A-EL]
• Based on the TCC diagram, the TCC control solenoid is turned on and off according to the vehicle speed and
throttle opening angle, and the TCC point control is performed.
• If any of the following three conditions are met, TCC is cancelled.
TCC Cancel Conditions
• Brake switch is ON
• Accelerator is fully closed (determined being idling)
• Engine coolant temperature is low
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5-6 SHIFT INHIBIT CONTROL OUTLINE [SJ6A-EL]
• The TCM inhibits shift change from the 5th to 6th gears when it determines that the engine is cold based on the
engine coolant temperature signal from the engine.
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TORQUE REDUCTION CONTROL AND LINE PRESSURE CONTROL OUTLINE [SJ6A-EL]
• While in a shift change between 1st and 6th gears, a torque reduction request signal is output from the TCM to
the PCM to cut engine torque amplification caused by shift changes to realize smooth shift shock.
• In addition, line pressure control in which line pressure is controlled during shift change between 1st and 6th
gears has been adopted to improve shift shock.
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05–13–36
AUTOMATIC TRANSMISSION [SJ6A-EL]
1GR
2GR
3GR 1J
4GR
1L
5GR
6GR
1GR
2GR
CAN
1G
4GR
1C
5GR
6GR
E5U051321101N10
TCM
3GR
E5U513ZS5036
E5U051318901N09
E5U051318901N10
E5U051318901N11