Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 2011n cip0748
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05-594 DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] 056EQ-05
DTC P0748 PRESSURE CONTROL SOLENOID "A"
ELECTRICAL (SHIFT SOLENOID VALVE
SL1)
DTC P0778 PRESSURE CONTROL SOLENOID "B"
ELECTRICAL (SHIFT SOLENOID VALVE
SL2)
DTC P0798 PRESSURE CONTROL SOLENOID "C"
ELECTRICAL (SHIFT SOLENOID VALVE
SL3)
DTC P0982 SHIFT SOLENOID "D" CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE S4)
DTC P0983 SHIFT SOLENOID "D" CONTROL CIRCUIT
HIGH (SHIFT SOLENOID VALVE S4)
DTC P0985 SHIFT SOLENOID "E" CONTROL CIRCUIT
LOW (SHIFT SOLENOID VALVE SR)
DTC P0986 SHIFT SOLENOID "E" CONTROL CIRCUIT
HIGH (SHIFT SOLENOID VALVE SR)
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 777
DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC 05-595
TRANSAXLE [ECT]
CIRCUIT 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 valve to allow the vehicle to
be operated smoothly (Fail safe function).
DTC No. DTC Detection Condition Trouble Area
ECM checks for an open or short circuit in shift solenoid valves S Open or short in shift solenoid valve SL1 circuit
P0748 SL1 (1-trip detection logic) S Shift solenoid valve SL1
S Output signal duty equals to 100% S ECM
ECM checks for an open or short circuit in shift solenoid valves S Open or short in shift solenoid valve SL2 circuit
P0778 SL2 (1-trip detection logic) S Shift solenoid valve SL2
Hybrid IC for solenoid indicates fail. S ECM
ECM checks for an open or short circuit in shift solenoid valves S Open or short in shift solenoid valve SL3 circuit
P0798 SL3 (1-trip detection logic) S Shift solenoid valve SL3
S Output signal duty equals to 100% S ECM
S Short in shift solenoid valve S4 circuit
ECM detects short in solenoid valve S4 circuit 2 times when
P0982 S Shift solenoid valve S4
solenoid valve S4 is operated (1-trip detection logic)
S ECM
S Open in shift solenoid valve S4 circuit
ECM detects open in solenoid valve S4 circuit 2 times when
P0983 S Shift solenoid valve S4
solenoid valve S4 is not operated (1-trip detection logic)
S ECM
S Short in shift solenoid valve SR circuit
ECM detects short in solenoid valve SR circuit 2 times when
P0985 S Shift solenoid valve SR
solenoid valve SR is operated (1-trip detection logic)
S ECM
S Open in shift solenoid valve SR circuit
ECM detects open in solenoid valve SR circuit 2 times when
P0986 S Shift solenoid valve SR
solenoid valve SR is not operated (1-trip detection logic)
S ECM
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 778
05-596 DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]
Fail safe function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid
ON and OFF in order to shift into the gear positions shown in the table below.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops send-
ing the current to the short circuit solenoid).
: ON : Lock-up ON : OFF
SL1
Solenoid SL2
Normal Valve SL3
S4
Gear Position 1st 2nd 3rd 4th 5th
SL1
SL1 Malfunction Solenoid SL2
(During driving at 1st Valve SL3
or 2nd) S4
Gear Position 1st 2nd 2nd 3rd 2nd 4th 2nd 5th 2nd
SL1
Solenoid SL2
SL1 Malfunction
Valve SL3
(During driving at 3rd)
S4
Gear Position 1st 4th 2nd 4th 3rd 4th 4th 5th 4th
SL1
Solenoid SL2
SL1 Malfunction
Valve SL3
(During driving at 4th
or 5th) S4
Gear Position 1st 4th 2nd 4th 3rd 4th 4th 5th 4th
SL1
Solenoid SL2
SL2 Malfunction Valve SL3
S4
Gear Position 1st 4th 2nd 4th 3rd 4th 4th 5th 4th
SL1
Solenoid SL2
SL3 Malfunction Valve SL3
S4
Gear Position 1st 2nd 3rd 4th 5th 4th
SL1
Solenoid SL2
S4 Malfunction Valve SL3
S4
Gear Position 1st 2nd 3rd 4th 5th 4th
SL1
Solenoid SL2
SL1, SL2, SL3, and S4 Valve SL3
Malfunction
S4
Gear Position 1st 4th 2nd 4th 3rd 4th 4th 5th 4th
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 779
DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC 05-597
TRANSAXLE [ECT]
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 shift solenoid valves in good
condition "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.).
MONITOR STRATEGY
P0748
Related DTCs P0748: Shift solenoid valve SL1/Range check
Required sensors/Components Shift solenoid valve SL1
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
P0778
Related DTCs P0778: Shift solenoid valve SL2/Range check
Required sensors/Components Shift solenoid valve SL2
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
P0798
Related DTCs P0798: Shift solenoid valve SL3/Range check
Required sensors/Components Shift solenoid valve SL3
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
P0982, P0983
P0982: Shift solenoid valve S4/Range check (Low resistance)
Related DTCs
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
P0985, P0986
P0985: Shift solenoid valve SR/Range check (Low resistance)
Related DTCs
P0986: Shift solenoid valve SR/Range check (High resistance)
Required sensors/Components Shift solenoid valve SR
Frequency of operation Continuous
Duration 0.064 sec.
MIL operation Immediate
Sequence of operation None
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 780
05-598 DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]
TYPICAL ENABLING CONDITIONS
P0748
The monitor will run whenever this DTC is not present. See page 05-9
Battery voltage 10 V or more
Ignition switch ON
Starter OFF
P0778
The monitor will run whenever this DTC is not present. See page 05-9
Solenoid current cut status Not cut
Battery voltage 11 V or more
CPU commanded duty ratio to SL2 19% or more
Ignition switch ON
Starter OFF
P0798
The monitor will run whenever this DTC is not present. See page 05-9
Battery voltage 10 V or more
Ignition switch ON
Starter OFF
P0982: Range check (Low resistance)
The monitor will run whenever this DTC is not present. See page 05-9
Shift solenoid valve S4 ON
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
P0983: Range check (High resistance)
The monitor will run whenever this DTC is not present. See page 05-9
Shift solenoid valve S4 OFF
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
P0985: Range check (Low resistance)
The monitor will run whenever this DTC is not present. See page 05-9
Shift solenoid valve SR ON
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
P0986: Range check (High resistance)
The monitor will run whenever this DTC is not present. See page 05-9
Shift solenoid valve SR OFF
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 781
DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC 05-599
TRANSAXLE [ECT]
TYPICAL MALFUNCTION THRESHOLDS
P0748
Output signal duty 100%
P0778
Solenoid status from IC Fail (Open or short)
P0798
Output signal duty 100%
P0982: Range check (Low resistance)
Shift solenoid valve S4 resistance 8 or less
P0983: Range check (High resistance)
Shift solenoid valve S4 resistance 100 k or more
P0985: Range check (Low resistance)
Shift solenoid valve SR resistance 8 or less
P0986: Range check (High resistance)
Shift solenoid valve SR resistance 100 k or more
WIRING DIAGRAM
Electronically Controlled
Transmission Solenoid ECM
6 19
W R-B
E1 E7 SL1+
SL1+
13 18
B B-W
E1 E7 SL1-
SL1-
5 15
LG L-Y
E1 E7 SL2+
SL2+
12 14
BR L-R
E1 E7 SL2-
SL2-
4 17
R G-B
E1 E7 SL3+
SL3+
11 16
L G-R
E1 E7 SL3-
SL3-
3 10
Y LG-B
E1 E7 S4
S4
9 9
V GR
E1 E7 SR
SR
C93632
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 782
05-600 DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(SL1/SL2/SL3)
SL2+ SL3+ (a) Disconnect the transmission wire connector from the
SL1+ transaxle.
(b) Measure the resistance between terminals SL1+ and
SL1-.
OK:
Resistance: 5.0 to 5.6 at 20 _C (68 _F)
(c) Check the continuity between the wire harness side con-
SL1-
SL2- SL3- nectors.
G24201 G25185 OK:
Standard (Check for short):
Symbols Specified condition
SL1+ - Body ground
No continuity
SL1- - Body ground
NG(A) Go to step 4
(d) Measure the resistance between terminals SL2+ and
SL2-.
OK:
Resistance: 5.0 to 5.6 at 20 _C (68 _F)
(e) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for short):
Symbols Specified condition
SL2+ - Body ground
No continuity
SL2- - Body ground
NG(B) Go to step 5
(f) Measure the resistance between terminals SL3+ and
SL3-.
OK:
Resistance: 5.0 to 5.6 at 20 _C (68 _F)
(g) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for short):
Symbols Specified condition
SL3+ - Body ground
No continuity
SL3- - Body ground
NG(C) Go to step 6
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 783
DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC 05-601
TRANSAXLE [ECT]
2 INSPECT TRANSMISSION WIRE(S4/SR)
S4
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure resistance between terminal S4 and body
ground.
OK:
Resistance: 11 to 15 at 20 _C (68 _F)
NG(A) Go to step 7
SR
G24201 G25185 (c) Measure resistance between terminal SR and body
ground.
OK:
Resistance: 11 to 15 at 20 _C (68 _F)
NG(B) Go to step 8
OK
3 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE-ECM)
(a) Connect the transmission connector to the transaxle.
E8 E7 E6 E5 E4 (b) Disconnect the connector from the ECM.
(c) Measure the resistance between terminals.
OK:
Resistance:
E1
SR SL1+ - SL1-: 5.0 to 5.6 at 20 _C (68 _F)
SL1+ SL2+ - SL2-: 5.0 to 5.6 at 20 _C (68 _F)
SL1- S4 SL3+ - SL3-: 5.0 to 5.6 at 20 _C (68 _F)
SL3+ SL2+
C82158 SL3- SL2- C91565 S4 - E1: 11 to 15 at 20 _C (68 _F)
SR - E1: 11 to 15 at 20 _C (68 _F)
(d) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for short):
Symbols Specified condition
SL1+ - Body ground
No continuity
SL1- - Body ground
SL2+ - Body ground
No continuity
SL2- - Body ground
SL3+ - Body ground
No continuity
SL3- - Body ground
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR(See page 01-37 )
OK
CHECK AND REPLACE ECM(See page 01-37 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 784
05-602 DIAGNOSTICS - ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]
4 INSPECT SHIFT SOLENOID VALVE(SL1)
(a) Remove the shift solenoid valve SL1.
1 2 (b) Measure the resistance between terminals.
OK:
Resistance: 5.0 to 5.6 at 20◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo