2007 TOYOTA SIENNA relay

2GR-FE FUEL – FUEL SYSTEMFU–7
FU
ON-VEHICLE INSPECTION
1. INSPECT FOR FUEL PUMP OPERATION AND FUEL
LEAK
(a) Check fuel pump operation.
(1) Connect the intelligent tester to the DLC3.
(2) Turn the engine switch on (IG) and push the
intelligent tester main switch on.
NOTICE:
Do not start the engine.
(3) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / FUEL
PUMP / SPD.
(4) Check for pressure in the fuel inlet tube from
the fuel line. Check that sound of fuel flowing in
the fuel tank can be heard. If no sound can be
heard, check the integration relay, fuel pump,
ECM and wiring connector.
(b) Check for fuel leaks (*1).
(1) Check that there are no fuel leaks anywhere on
the system after performing maintenance. If
there is a fuel leak, repair or replace parts as
necessary.
(c) Turn the engine switch off.
(d) Disconnect the intelligent tester from the DLC3.
2. CHECK FUEL PRESSURE
(a) Discharge the fuel system pressure (See page FU-
1).
(b) Using a voltmeter, measure the battery voltage.
Standard voltage:
11 to 14 V
(c) Disconnect the cable from the negative (-) battery
terminal.
(d) Disconnect the fuel hose from the fuel main tube
(See page FU-1).

2GR-FE FUEL – FUEL SYSTEMFU–1
FU
FUEL SYSTEM
PRECAUTION
1. PRECAUTION
(a) Before inspecting and repairing the fuel system,
disconnect the cable from the negative (-) battery
terminal.
(b) Do not smoke or work near fire when handling the
fuel system.
(c) Keep gasoline away from rubber or leather parts.
2. DISCHARGE FUEL SYSTEM PRESSURE (*1)
CAUTION:
• Perform the following procedures to prevent fuel
from spilling out before removing any fuel system
parts.
• Pressure will still remain in the fuel line even after
performing the following procedures. When
disconnecting the fuel line, cover it with a shop
rag or a piece of cloth to prevent fuel from
spraying or coming out.
(a) Remove the circuit opening relay from the engine
room relay block.
(b) Start the engine.
(c) After the engine stops, turn the engine switch off.
HINT:
DTC P0171/25 (fuel problem) may be detected.
(d) Crank the engine again. Check that the engine does
not start.
(e) Remove the fuel tank cap to discharge pressure
from the fuel tank.
(f) Disconnect the cable from the negative (-) battery
terminal.
(g) Reinstall the circuit opening relay.
3. FUEL SYSTEM
(a) When disconnecting the high pressure fuel line, a
large amount of gasoline will spill out, so observe
the following procedures:
(1) Discharge the fuel system pressure(*1).
(2) Disconnect the fuel pump tube (See page FU-
30).
(3) Drain the fuel that remains in the fuel pump tube.
(4) To protect the disconnected fuel pump tube from
damage and contamination, cover it with a
plastic bag.
(5) Put a container under the connectors.
A075349E01
B000679E07

2GR-FE FUEL – FUEL SYSTEMFU–7
FU
ON-VEHICLE INSPECTION
1. INSPECT FOR FUEL PUMP OPERATION AND FUEL
LEAK
(a) Check fuel pump operation.
(1) Connect the intelligent tester to the DLC3.
(2) Turn the engine switch on (IG) and push the
intelligent tester main switch on.
NOTICE:
Do not start the engine.
(3) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / FUEL
PUMP / SPD.
(4) Check for pressure in the fuel inlet tube from
the fuel line. Check that sound of fuel flowing in
the fuel tank can be heard. If no sound can be
heard, check the integration relay, fuel pump,
ECM and wiring connector.
(b) Check for fuel leaks (*1).
(1) Check that there are no fuel leaks anywhere on
the system after performing maintenance. If
there is a fuel leak, repair or replace parts as
necessary.
(c) Turn the engine switch off.
(d) Disconnect the intelligent tester from the DLC3.
2. CHECK FUEL PRESSURE
(a) Discharge the fuel system pressure (See page FU-
1).
(b) Using a voltmeter, measure the battery voltage.
Standard voltage:
11 to 14 V
(c) Disconnect the cable from the negative (-) battery
terminal.
(d) Disconnect the fuel hose from the fuel main tube
(See page FU-1).

ST–142GR-FE STARTING – STARTER RELAY
ST
STARTER RELAY
ON-VEHICLE INSPECTION
1. INSPECT STARTER RELAY
(a) Using an ohmmeter, measure the resistance
between each terminal.
Standard resistance
If the result is not as specified, replace the starter
relay assembly.
B060778E26Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5Below 1
(when battery voltage is applied to
terminals 1 and 2)

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–67
AX
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor,
intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement
condition of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the
ECM memory to detect a mechanical problems of the shift solenoid valve DSL, valve body and torque
converter clutch.
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on the speed sensor (NT), speed sensor (NC),
engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear
selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm
(NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input
turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up"
by applying control voltage to the shift solenoid DSL. When the DSL is turned on, it applies pressure to the
lock-up relay valve and locks the torque converter clutch.
If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not
requested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system
performance. The ECM will turn on the MIL and store the DTC.
HINT:
Example:
When any of the following is met, the system judges it as a malfunction.
• There is a difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock-up.
(Engine speed is at least 100 rpm greater than input turbine speed.)
• There is no difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock-up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
MONITOR STRATEGY
DTC P0741Torque Converter Clutch Solenoid Performance
(Shift Solenoid Valve DSL)
DTC No. DTC Detection Condition Trouble Area
P0741Lock-up does not occur when driving in the lock-up
range (normal driving at 80 km/h [50 mph]), or lock up
remains ON in the lock-up OFF range.
(2-trip detection logic)• Shift solenoid valve DSL remains open or closed
• Valve body is blocked
• Torque converter clutch
• Automatic transaxle (clutch, brake or gear etc.)
• Line pressure is too low
Related DTCsP0741:
Shift solenoid valve DSL/OFF malfunction
Shift solenoid valve DSL/ON malfunction
Required sensors/ComponentsShift solenoid valve DSL, Speed sensor (NT), Speed sensor (NC),
Crankshaft position sensor (NE), Throttle position sensor (VPA1),
Mass air flow sensor (MAF), Transmission temperature sensor
(THO1), Engine coolant temperature sensor (ECT)
Frequency of operation Continuous
DurationOFF malfunction (A)
Continuous.
OFF malfunction (B)
1 sec.
OFF malfunction (C)
3.5 sec.
ON malfunction
1.8 sec.

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–69
AX
INSPECTION PROCEDURE
HINT:
Using the intelligent tester to perform ACTIVE TEST allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing ACTIVE TEST
early in troubleshooting is one way to save diagnostic time. DATA LIST information can be displayed while
performing ACTIVE TEST.
1. PERFORM ACTIVE TEST
(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 / ACTIVE TEST".
(g) According to the display on the tester, perform the "ACTIVE TEST".
HINT:
• This test can be conducted when the vehicle speed is 60 km/h (37 mph) or more.
• This test can be conducted in the 5th gear.
(h) Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
HINT:
• When changing the accelerator pedal opening angle while driving, if the engine speed does
not change, lock-up is on.
• Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the
pedal will close the throttle valve and lock-up may be turned off.)
Tester Display Test Part Control Range Diagnostic Note
LOCK UP[Test Details]
Control the shift solenoid DSL to set the automatic
transaxle to the lock-up condition.
[Vehicle Condition]
• Throttle valve opening angle: Less than 35 %
• Vehicle Speed: 60 km/h (37 mph) or more, and
5th gearON/OFFPossible to check the DSL
operation.
G029214E02

AX–74U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OFF malfunction:
ON malfunction:
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met: OFF malfunction or ON malfunction
OFF malfunction:
2 detections are necessary per driving cycle:
1st detection; temporary flag ON
2nd detection; pending fault code ON
ON malfunction:
INSPECTION PROCEDURE
HINT:
Using the intelligent tester to perform ACTIVE TEST allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing ACTIVE TEST
early in troubleshooting is one way to save diagnostic time. DATA LIST information can be displayed while
performing ACTIVE TEST.
1. PERFORM ACTIVE TEST
(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 / ACTIVE TEST / SHIFT".
(g) According to the display on the tester, perform the "ACTIVE TEST".
HINT:
While driving, the shift position can be forcibly changed with the intelligent tester.
Shift solenoid valve SL3 circuit Not circuit malfunction
Shift solenoid valve S4 circuit Not circuit malfunction
Shift solenoid valve SR circuit Not circuit malfunction
Shift solenoid valve DSL circuit Not circuit malfunction
Electronic throttle systemNot circuit malfunction
ECM selected gear1st
Vehicle speedLess than 40 km/h (24.9 mph)
Throttle valve opening angle4.5% or more at engine speed 1,900 rpm
(Varies with engine speed)
ECM selected gear2nd
Throttle valve opening angle4.5% or more at engine speed 1,900 rpm
(Varies with engine speed)
Input (turbine) speed/Intermediate shaft speed 1.49 to 1.63
Input (turbine) speed/Intermediate shaft speed 2.72 to 2.86

AX–82U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OFF malfunction (A):
OFF malfunction (B):
ON malfunction (A):
ON malfunction (B):
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met: OFF malfunction (A) and (B), or ON malfunction (A) and
(B)
2 detections are necessary per driving cycle:
1st detection; temporary flag ON
2nd detection; pending fault code ON
OFF malfunction (A):
OFF malfunction (B):
ON malfunction (A):
ON malfunction (B):
INSPECTION PROCEDURE
HINT:
Using the intelligent tester to perform ACTIVE TEST allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing ACTIVE TEST
early in troubleshooting is one way to save diagnostic time. DATA LIST information can be displayed while
performing ACTIVE TEST.
1. PERFORM ACTIVE TEST
(a) Warm up the engine.
(b) Turn the ignition switch off.
Shift solenoid valve S4 circuit Not circuit malfunction
Shift solenoid valve SR circuit Not circuit malfunction
Shift solenoid valve DSL circuit Not circuit malfunction
Electronic throttle systemNot circuit malfunction
ECM selected gear5th
Throttle valve opening angle 5% or more
Vehicle speed10 km/h (6.2 mph) or more
ECM lock-up commandON
ECM selected gear3rd, 4th or 5th
Throttle valve opening angle 10% or more
Vehicle speed 25 to 100 km/h (15.5 to 62.1 mph)
ECM selected gear4th or 5th
Throttle valve opening angle4.5% or more at engine speed 1,900 rpm
(Varies with engine speed)
ECM selected gear4th
Throttle valve opening angle 5% or more
Vehicle speed10 km/h (6.2 mph) or more
Intermediate shaft speed/Output speed 1.44 to 1.58
Difference between engine speed and input (turbine) speed Less than 35 rpm
Input (turbine) speed/Intermediate shaft speed 0.64 to 0.74
Intermediate shaft speed/Output speed 1.02 to 1.16