Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 291
AUTOMATIC TRANSMISSION (AW30-40LE) 7A-13
CONTROL AND FUNCTIONS
Item Description
Shift and lock-up control
• In D range, speed change point and Lock-up point can be
changed by setting pattern selection switch to "POWER",
"NORMAL" or "WINTER (UBS)" mode.
• Gear shift position in the conditions made up of transmission shift
positions (D.2.L) combined with pattern selection switch
(POWER, NORMAL, and WINTER) can be controlled in
accordance with vehicle speed and the opening of throttle valve.
Overdrive cut control
• If O/D switch is set on in D range (O/D OFF lamp ON), gear shift
to O/ D is not effected.
• Overdrive is released at O/D switch on and high transmission oil
temperature (More than 130
°C).
However, to prevent engine over revolution
• 4→3 shifting at vehicle speed is less than 118 km/h (UBS) or
117 km/h (TF).
• 3→4 shifting at vehicle speed is more than 131 km/h (UBS) or
125 km/h (TF) or 120 km/h (‘01TFR for Thailand).
Lock-up cut control
• In D range, 2nd (TF), 3rd or O/D lock-up is conducted in
"POWER" or "NORMAL" mode.
• In 2, L range, lock-up is off in the whole area.
• Lock-up is released at brake on or high transmission oil
temperature
(More than 130
°C UBS and 01’TFR for thailand)
.
(More than 140
°C TF).
• Lock-up is prohibited while driving in coasting condition.
Driving mode select control
• The TCM selects a suitable driving mode from the nine kinds for
the variety driving condition.
i) Economy mode ii)Power mode iii)Winter mode(UBS) iv)HOT1
mode v)HOT2 mode vi)L4 mode(4
×4) vii)Slope mode(UBS)
(Up slope 1, Up slope 2 and Down slope mode)
• The priority of driving mode:
Economy < Power < Slope(UBS) < L4(4
×4) < Winter(UBS) <
HOT1 < HOT2
Squat control
• When the TCM detects D signal on, the TCM controls 1–3–1 shift
by setting a timer, in order to improve the shift feel at N
→D.
Line pressure control
• The TCM output current which corresponds to throttle oil
pressure to pressure control solenoid based on throttle opening.
Indicate oil temperature warning function
• If the transmission oil temperature sensor senses that
transmission oil temperature is greater than 146
°C, the TCM turn
on A/T OIL TEMP warning lamp. (The warning lamp is turned off,
if oil temperature is less than 126
°C.)
L4 mode control (4
×4)
• The TCM judges whether the transfer is engaged in high or low
based on the ratio rpm data from output speed sensor in the
transmission and the rpm data from speed meter sensor to select
the shift map.
Up and down hill control (UBS)
• The TCM judges up and down hill, and change shift pattern
based on throttle opening and acceleration.