Toyota Tundra 2005 Service - Repair - Maintenance page 1520

DI−1236
DTC P0985
DTC P0986
CIRCUIT DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves
SL1, SL2, S1, S2 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the
shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be
operated smoothly (See page DI−1150).
DTC No.
ECM detects short in solenoid valve SR circuit 2 times when
P0985
solenoid valve SR is operated (1−trip detection logic)
ECM detects open in solenoid valve SR circuit 2 times when
P0986
solenoid valve SR is not operated (1−trip detection logic)
MONITOR DESCRIPTION
These DTCs indicate an open or short in the shift solenoid valve SR circuit. When there is an open or short
circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores
the DTC. When the shift solenoid valve SR is on, if resistance is 8 Ω or less, the ECM determines there is
a short in the shift solenoid valve SR circuit.
When the shift solenoid valve SR is off, if resistance is 100 kΩ or more, the ECM determines there is an open
in the shift solenoid valve SR circuit (See page DI−1150).
MONITOR STRATEGY
Related DTCs R l t d DTC
Required sensors/Components
Frequency of operation
Duration
MIL operation
Sequence of operation
DIAGNOSTICS
Shift Solenoid "E" Control Circuit Low
(Shift Solenoid Valve SR)
Shift Solenoid "E" Control Circuit High
(Shift Solenoid Valve SR)
DTC Detection Condition
P0985
P0986
Shift solenoid valve SR
Continuous
0.064 sec.
Immediate
None
− AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ−FE)
S Short in shift solenoid valve SR circuit
S Shift solenoid valve SR
S ECM
S Open in shift solenoid valve SR circuit
S Shift solenoid valve SR
S ECM
Shift solenoid valve SR/Range check (Low resistance)
Shift solenoid valve SR/Range check (High resistance)
Trouble Area
DIDWY−01