TOYOTA SIENNA 2007 Service Repair Manual

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–45
AX
DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
MONITOR DESCRIPTION
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/
neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that engine can be started
only when the shift lever is in the P or N position
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D).
The ECM determines that there is a problem with the switch or related parts if in receives more than 1
position signal simultaneously. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
DTC P0705Transmission Range Sensor Circuit Malfunc-
tion (PRNDL Input)
DTC No. DTC Detection Condition Trouble Area
P0705(A) Any 2 or more signals of the following are ON
simultaneously (2-trip detection logic)
• P input signal is ON.
• N input signal is ON.
• R input signal is ON.
• D input signal is ON.
• 3 input signal is ON.
• 2 input signal is ON.
(B) Any 2 or more signals of the following are ON
simultaneously (2-trip detection logic)
• NSW (STAR) input signal is ON.
• R input signal is ON.
• D input signal is ON.
• 3 input signal is ON.
• 2 input signal is ON.
(C) All switches are OFF simultaneously for NSW
(STAR), P, R, N, D, 3, 2 positions (2-trip detection
logic).
(D) Both 1 and 2 conditions are met (2-trip detection
logic)
1. One of the following conditions are met
(a) NSW (STAR) input signal is ON.
(b) P input signal is ON.
(c) N input signal is ON.
(d) R input signal is ON.
2. One of the following conditions are met
(a) 4 input signal is ON.
(b) L input signal is ON.• Short in park/neutral position switch circuit
• Park/neutral position switch
•ECM
Related DTCs P0705: Park/neutral position switch/Verify switch input
Required sensors/Components Park/neutral position switch
Frequency of operation Continuous
DurationCondition (A), (B), (D)
2 sec.
Condition (C)
60 sec.
MIL operation 2 driving cycles
Sequence of operation None

AX–46U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL ENABLING CONDITIONS
All:
TYPICAL MALFUNCTION THRESHOLDS
1. One of the following conditions are met: Condition (A), (B), (C) and (D)
Condition (A):
Condition (B):
Condition (C):
Condition (D):
Both of the following conditions (1) or (2) are met:
COMPONENT OPERATING RANGE
The monitor will run whenever this DTC is not present. None
Ignition switchON
Battery voltage10.5 V or more
Number of the following signal input at the same time 2 or more
P switchON
N switchON
R switchON
D switchON
3 switchON
2 switchON
Number of the following signal input at the same time 2 or more
NSW (STAR) switchON
R switchON
D switchON
3 switchON
2 switchON
NSW (STAR) switchOFF
P switchOFF
N switchOFF
R switchOFF
D switchOFF
3 switchOFF
2 switchOFF
(1) One of the following conditions are met -
NSW (STAR) switchON
P switchON
R switchON
N switchON
(2) One of the following conditions are met -
4 shift position switchON
L shift position switchON
Park/neutral Position switch The park/neutral position switch sends only one signal to the ECM.

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–47
AX
WIRING DIAGRAM
C160583E01

AX–48U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
INSPECTION PROCEDURE
(a) Disconnect the park/neutral position switch connector.
(b) Measure resistance according to the value(s) in the table
below when the shift lever is moved to each position.
Standard resistance
NG
OK
(a) Connect the park/neutral position switch connector.
(b) Disconnect the transmission control switch connector of
shift lock control unit assembly.
(c) Measure resistance according to the value(s) in the table
below when the shift lever is moved to each position.
Standard resistance
NG
OK
1INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
C110340E20
Shift Position Tester Connection Specified Condition
P
2 - 6 and 4 - 5Below 1
Except P 10 k or higher
R
2 - 1Below 1
Except R 10 k or higher
N
2 - 9 and 4 - 5Below 1
Except N 10 k or higher
D and 4
2 - 7Below 1
Except D and 4 10 k or higher
3
2 - 3Below 1
Except 3 10 k or higher
2 and L
2 - 8Below 1
Except 2 and L 10 k or higher
REPLACE PARK/NEUTRAL POSITION
SWITCH ASSEMBLY
2INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY
G025493E01
Shift Position Tester Connection Specified Condition
D 2 - 9 Below 1
410 k or higher
D 3 - 9 10 k
or higher
4
Below 1
2 5 - 10 Below 1
L10 k or higher
2 4 - 10 10 k
or higher
L
Below 1
REPLACE SHIFT LOCK CONTROL UNIT
ASSEMBLY

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–49
AX
(a) Connect the transmission control switch connector of
shift lock control unit assembly.
(b) Turn the ignition switch to the ON position, and measure
the voltage according to the value(s) in the table below
when the shift lever is moved to each position.
Standard voltage
HINT:
*: The voltage will drop slightly due to lighting up of the
back up light.
NG
OK
3CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
C131058E03
Shift Position Tester Connection Specified Condition
P and N
E10-8 (NSW (STAR)) - Body groundBelow 1 V
Except P and N11 to 14 V
P
E5-23 (P) - Body ground11 to 14 V
Except PBelow 1 V
N
E5-22 (N) - Body ground11 to 14 V
Except NBelow 1 V
R
E5-11 (R) - Body ground11 to 14 V
*
Except RBelow 1 V
D and 4
E5-21 (D) - Body ground11 to 14 V
Except D and 4Below 1 V
4
E5-20 (4) - Body ground11 to 14 V
Except 4Below 1 V
3
E5-19 (3) - Body ground11 to 14 V
Except 3Below 1 V
2 and L
E5-10 (2) - Body ground11 to 14 V
Except 2 and LBelow 1 V
L
E5-9 (L) - Body ground11 to 14 V
Except LBelow 1 V
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE ECM

AX–50U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a
resistance value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1.
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes
higher, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes
down as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC P0710Transmission Fluid Temperature Sensor "A"
Circuit
DTC P0712Transmission Fluid Temperature Sensor "A"
Circuit Low Input
DTC P0713Transmission Fluid Temperature Sensor "A"
Circuit High Input
DTC No. DTC Detection Condition Trouble Area
P0710(a) and (b) are detected momentarily within 0.5 sec.
when neither P0712 nor P0713 is detected (1-trip
detection logic)
(a) ATF temperature sensor resistance is less than 79
.
(b) ATF temperature sensor resistance is more than
156 k
.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b)
or from (b) to (a)• Open or short in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
G031389E12

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–51
AX
MONITOR DESCRIPTION
These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor (TFT
sensor) circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to
an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and
the ECM detects an opens or shorts in the ATF temperature circuit. If the resistance value of the ATF
temperature is less than 79
*1or more than 156 k *2, the ECM interprets this as a fault in the ATF
sensor or wiring. The ECM will turn on the MIL and store the DTC.
*1: 150
C (302F) or more is indicated regardless of the actual ATF temperature.
*2: -40
C (-40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or intelligent tester display.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0710: Range check (Chattering)
P0712: Range check (Low resistance)
P0713: Range check (High resistance)
TYPICAL MALFUNCTION THRESHOLDS
P0710: Range check (Chattering)
P0712: Range check (Low resistance)
P0713: Range check (High resistance)
P0712ATF temperature sensor resistance is less than 79
for 0.5 sec. or more (1-trip detection logic)• Short in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
P0713ATF temperature sensor resistance is more than 156
k
when 15 minutes or more have elapsed after the
engine start
DTC is detected for 0.5 sec. or more (1-trip detection
logic)• Open in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
Related DTCsP0710: ATF temperature sensor/Range check (Chattering)
P0712: ATF temperature sensor/Range check (Low resistance)
P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/Components ATF temperature sensor (TFT sensor)
Frequency of operation Continuous
Duration 0.5 sec.
MIL operation Immediate
Sequence of operation None
The monitor will run whenever these DTCs are not present. None
The typical enabling condition is not available. -
The monitor will run whenever this DTC is not present. None
Time after engine start 15 min. or more
TFT (Transmission fluid temperature) sensor resistanceLess than 79
or
More than 156 k
TFT sensor resistanceLess than 79
TFT sensor resistance More than 156 k
DTC No. DTC Detection Condition Trouble Area

AX–52U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Using the intelligent tester to read the DATA LIST allows the values or states of switches, sensors,
actuators and other items to be read without removing any parts. This non-intrusive inspection can be
very useful because intermittent conditions or signals may be discovered before parts or wiring is
disturbed. Reading the DATA LIST information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the value listed under "Normal Condition" are reference values. Do not depend
solely on these reference values when deciding whether apart is faulty or not.
1. READ DATA LIST
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle
interface module) to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Turn on the tester.
(f) Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
(g) According to the display on the tester, read the "DATA LIST".
HINT:
When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150
C (302F),
there is a short circuit.
When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40
C (-40F),
there is an open circuit.
TFT sensor. Atmospheric temperature to approx. 130C (266F)
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
A/T OIL TEMP 1AT F Te m p . S e n s o r Va l u e /
min.: -40
C (-40F)
max.: 215
C (419F)• After Stall Test;
Approx. 80
C (176F)
• Equal to ambient temperature
when cold soakIf the value is "-40
C (-40F)" or
"215
C (419F)", ATF temp.
sensor circuit is opened or
shorted.
G039665E07

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–53
AX
Measure the resistance between terminal THO1 (THO) and body ground.
HINT:
If a circuit related to the ATF temperature sensor become open, P0713 is immediately set (in 0.5
second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
HINT:
If the resistance is out of the specified range with either
the ATF temperature shown in the table below, the
driveability of the vehicle may decrease.
NG
OK
(a) Connect the transmission wire connector to the
transaxle.
(b) Disconnect the ECM connectors.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(d) Measure the resistance according to the value(s) in the
table below.
Temperature Displayed Malfunction
-40
C (-40F) Open circuit
150
C (302F) or more Short circuit
1INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)
C113969E35
Tester Connection Specified Condition
1 (THO) - 7 (E2) 79
to 156 k
1 (THO) - Body ground 10 k or higher
7 (E2) - Body ground
ATF Temperature Specified Condition
10
C (50F) 5 to 8 k
25C (77F) 2.5 to 4.5 k
11 0C (230F) 0.22 to 0.28 k
REPAIR OR REPLACE TRANSMISSION
WIRE
2CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
G038618E15
Tester Connection Specified Condition
E10-24 (THO1) - E9-28 (E2) 79
to 156 k

AX–54U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
Standard resistance (Check for short)
NG
OK
Tester Connection Specified Condition
E10-24 (THO1) - Body ground
10 k
or higher
E9-28 (E2) - Body ground
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE ECM