2007 TOYOTA SIENNA Service Repair Manual

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Page 1777 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–105
AX
HINT:
If any other codes besides "P0796" are output, perform
the troubleshooting for those DTCs first.
B
A
(a) Remove the

Page 1778 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–106U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OK
REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

Page 1779 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–107
AX
DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift soleno

Page 1780 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–108U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance

Page 1781 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–109
AX
(a) Connect the transmission wire connector to the
transaxle.
(b) Disconnect the connector from the ECM.
(c) Measure the resistan

Page 1782 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–110U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OK
REPAIR OR REPLACE TRANSMISSION WIRE

Page 1783 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–111
AX
DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift soleno

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–111
AX
DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid
valves SL1, SL2, SL3, S4 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 (Fail safe function).
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". 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. And the ECM performs the fail-safe function and turns the other normal shift solenoid
valves "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.)
(See page AX-30).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0982: Range check (Low resistance):
P0983: Range check (High resistance):
DTC P0982Shift Solenoid "D" Control Circuit Low (Shift
Solenoid Valve S4)
DTC P0983Shift Solenoid "D" Control Circuit High (Shift
Solenoid Valve S4)
DTC No. DTC Detection Condition Trouble Area
P0982ECM detects short in solenoid valve S4 circuit 2 times
when solenoid valve S4 is operated (1-trip detection
logic)• Short in shift solenoid valve S4 circuit
• Shift solenoid valve S4
•ECM
P0983ECM detects open in solenoid valve S4 circuit 2 times
when solenoid valve S4 is not operated (1-trip detection
logic)• Open in shift solenoid valve S4 circuit
• Shift solenoid valve S4
•ECM
Related DTCsP0982: Shift solenoid valve S4/Range check (Low resistance)
P0983: Shift solenoid valve S4/Range check (High resistance)
Required sensors/Components Shift solenoid valve S4
Frequency of operation Continuous
Duration 0.064 sec.
MIL operation Immediate
Sequence of operation None
The monitor will run whenever this DTC is not present. None
Shift solenoid valve S4ON
Battery voltage8 V or more
Ignition switchON
Sta r t e rOFF
The monitor will run whenever this DTC is not present. None
Shift solenoid valve S4OFF
Battery voltage8 V or more
Ignition switchON
Sta r t e rOFF

Page 1784 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–112U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL MALFUNCTION THRESHOLDS
P0982: Range check (Low resistance):
P0983: Range check (High resistance):
COMPONENT OPERATING RANG

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