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Home >> Toyota >> 2016 >> 4Runner Limited, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission System (A750E) - Diagnostic Codes & Circuit Tests) >> Automatic Transmission System >> DTC P0781: 1-2 Shift (1-2 Shift Valve) [08/2015 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
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The monitor will run whenever the following DTCs are not stored P0717 (Turbine speed sensor circuit)
P0722 (Output speed sensor circuit)
P0973, P0974 (Shift solenoid valve S1 circuit)
P0976, P0977 (Shift solenoid valve S2 circuit)
P0985, P0986 (Shift solenoid valve SR circuit)
P0748 (Shift solenoid valve SL1 circuit)
P0778 (Shift solenoid valve SL2 circuit)
P0128 (ECT (Engine Coolant Temperature) sensor circuit)
P0327, P0328, P0332, P0333 (KCS sensor circuit)
ETCS (Electric Throttle Control System) Not system down
Transmission position "D"
Duration time from shifting "N" to "D" 4 sec. or more
ECT 40°C (104°F) or higher
Spark advance from max. retard timing by KCS control 0° crankshaft angle or more
Engine Starting
CONDITION (A)

ECM selected gear 2nd
Duration time from shift command of ECM 2 sec. or more
Vehicle speed 2 km/h (1.2 mph) or more
Output speed 2nd → 1st down shift point or more
Throttle valve opening angle 6.5% or more at 2000 rpm
(Conditions vary with engine speed)
Calculated load value 7.75% or more
Following conditions is met: (a), (b), (c), (d) or (e) -
(a) Turbine speed/Output speed (NT/NO) 3.30 or more, and 7.50 or less
(This means actual gear is 1st)
(b) Turbine speed/Output speed (NT/NO) 1.91 or more, and 2.35 or less
(This means actual gear is 2nd)
(c) Turbine speed/Output speed (NT/NO) 1.28 or more, and 1.53 or less
(This means actual gear is 3rd)
(d) Turbine speed/Output speed (NT/NO) 0.93 or more, and 1.07 or less
(This means actual gear is 4th)
(e) Turbine speed/Output speed (NT/NO) 0.65 or more, and 0.79 or less
(This means actual gear is 5th)
CONDITION (B)

ECM selected gear 4th
Duration time from shift command of ECM 2 sec. or more
Vehicle speed 2 km/h (1.2 mph) or more
Throttle valve opening angle 6.5% or more at 2000 rpm
(Conditions vary with engine speed)
Calculated load value 7.75% or more
Following conditions is met: (a), (b), (c), (d) or (e) -
(a) Turbine speed/Output speed (NT/NO) 3.30 or more, and 7.50 or less
(This means actual gear is 1st)
(b) Turbine speed/Output speed (NT/NO) 1.91 or more, and 2.35 or less
(This means actual gear is 2nd)
(c) Turbine speed/Output speed (NT/NO) 1.28 or more, and 1.53 or less
(This means actual gear is 3rd)
(d) Turbine speed/Output speed (NT/NO) 0.93 or more, and 1.07 or less
(This means actual gear is 4th)
(e) Turbine speed/Output speed (NT/NO) 0.65 or more, and 0.79 or less
(This means actual gear is 5th)
CONDITION (C)

Current ECM selected gear 5th
Last ECM selected gear 4th
Vehicle speed
(During transition from 4th to 5th gear)
Less than 100 km/h (62.2 mph)
CONDITION (D)

ECM selected gear 5th
Engine speed - Turbine speed (NE - NT)
(After transition from 4th to 5th gear)
150 rpm or less
Vehicle speed
(After transition from 4th to 5th gear)
Less than 100 km/h (62.2 mph)