TOYOTA SIENNA 2007 Service Repair Manual

CO–42GR-FE COOLING – COOLING FAN SYSTEM
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SYSTEM DIAGRAM
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2GR-FE COOLING – COOLING FAN SYSTEMCO–5
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ON-VEHICLE INSPECTION
1. INSPECT COOLING FAN SYSTEM
(a) Put the vehicle in the following conditions:
(1) The engine switch is off.
(2) The coolant temperature is less than 95
C
(203
F).
(3) The battery voltage is between 9 and 14 V.
(4) The A/C switch is OFF.
(b) Clamp the 400 A probe of an ammeter over the M+
wire of each cooling fan motor.
(c) Turn the ignition switch to the ON position and wait
for approximately 10 seconds. Check that the fan
stops.
(d) Start the engine. Check that the fan stops with the
engine idling.
HINT:
• Make sure that the radiator engine coolant
temperature is less than 95
C (203F).
• Turn the A/C switch OFF.
(e) Check that the fan operates when the A/C switch is
turned ON (MAX COOL and the magnetic clutch is
operating).
Standard current
HINT:
The coolant temperature is less than 95
C (203F).
(f) Check that the fan operates when the engine
coolant temperature sensor connector is
disconnected.
Standard current
Item Specified Condition
No. 1 cooling fan motor 5 to 14 A
No. 2 cooling fan motor 4 to 12 A
Item Specified Condition
No. 1 cooling fan motor 5 to 19 A
No. 2 cooling fan motor 4 to 16 A

CO–62GR-FE COOLING – COOLING FAN SYSTEM
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(g) After the engine is warmed up, check that the fan
operates as shown in the illustration.
HINT:
• The coolant temperature at which the fan starts
operating is approximately 95
C (203F).
• This system can also be checked using the
intelligent tester.
• Select the following menu items: Powertrain /
Engine / Data List / Initial Engine Coolant Temp.
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2GR-FE COOLING – RADIATORCO–29
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REMOVAL
1. REMOVE V-BANK COVER SUB-ASSEMBLY (See
page EM-28)
2. REMOVE NO. 1 ENGINE UNDER COVER (See page
EM-26)
3. DRAIN ENGINE COOLANT (See page CO-6)
4. REMOVE NO. 2 AIR CLEANER INLET (See page EM-
28)
5. REMOVE BATTERY (See page EM-26)
6. REMOVE FRONT BUMPER ASSEMBLY (See page
ET-3)
7. REMOVE FRONT BUMPER ENERGY ABSORBER
8. REMOVE NO. 1 AIR CLEANER INLET (See page EM-
28)
9. DISCONNECT RADIATOR RESERVE TANK HOSE OR
PIPE
(a) Disconnect the radiator reserve tank hose or pipe
from the radiator.
10. DISCONNECT NO. 1 RADIATOR HOSE
(a) Disconnect both connections of the No. 1 radiator
hose from the radiator.
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CO–302GR-FE COOLING – RADIATOR
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11. DISCONNECT NO. 2 RADIATOR HOSE
(a) Disconnect the No. 2 radiator hose from the
radiator.
12. REMOVE HOOD LOCK RELEASE LEVER
PROTECTOR
(a) Disengage the 4 claws and remove the hood lock
release lever protector.
13. REMOVE HOOD LOCK ASSEMBLY
(a) With Hood Courtesy Switch:
(1) Disconnect the connector.
(b) Remove the 3 bolts.
(c) Disconnect the cable and remove the hood lock
assembly.
14. REMOVE HOOD LOCK SUPPORT SUB-ASSEMBLY
(a) Disconnect the ambient temperature sensor
connector.
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2GR-FE COOLING – RADIATORCO–31
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(b) Detach the clamp.
(c) Disconnect the low pitched horn and high pitched
horn connectors.
(d) Remove the 2 bolts and hood lock support sub-
assembly.
15. DISCONNECT COOLING FAN ECU CONNECTOR
(a) Disconnect the cooling fan ECU connector.
(b) Detach the clamp.
16. REMOVE RADIATOR UPPER SUPPORT SUB-
ASSEMBLY
(a) Remove the 4 bolts and radiator upper support sub-
assembly.
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CO–322GR-FE COOLING – RADIATOR
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17. DISCONNECT NO. 2 OIL COOLER OUTLET TUBE
SUB-ASSEMBLY
(a) Disconnect the No. 1 oil cooler inlet and No. 1 oil
cooler outlet hoses from the No. 2 oil cooler outlet
tube sub-assembly.
(b) Disconnect the No. 1 transmission oil cooler hoses
from the radiator.
(c) Remove the 2 bolts and No. 2 oil cooler outlet tube
sub-assembly.
18. REMOVE HEADLIGHT ASSEMBLY RH
(a) Use the same procedures for the RH side and LH
side.
HINT:
See page LI-69
19. REMOVE RADIATOR SIDE DEFLECTOR RH
(a) Disengage the 3 claws and remove the radiator side
deflector RH.
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2GR-FE COOLING – RADIATORCO–33
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20. REMOVE HEADLIGHT BRACKET RH
(a) Remove the 3 nuts and headlight bracket RH.
21. REMOVE PRESSURE FEED TUBE ASSEMBLY
(a) Remove the 2 bolts.
22. REMOVE RADIATOR SUPPORT CUSHION
(a) Remove the 2 radiator support cushions from the
No. 1 radiator support.
23. REMOVE NO.1 RADIATOR SUPPORT
(a) Detach the clamp.
(b) Remove the 6 bolts and No. 1 radiator support.
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CO–342GR-FE COOLING – RADIATOR
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24. REMOVE RADIATOR ASSEMBLY WITH FAN
SHROUD AND FAN MOTOR
(a) Remove the 2 bolts and separate the condenser
assembly from the radiator assembly with fan
shroud and fan motor.
(b) Remove the radiator assembly with fan shroud and
fan motor from the body.
25. REMOVE FAN SHROUD WITH FAN MOTOR
(a) Remove the 2 bolts and fan shroud with fan motor
from the radiator.
26. REMOVE RADIATOR SUPPORT LOWER
(a) Remove the 2 radiator support lowers from the
radiator assembly.
27. REMOVE NO. 2 RADIATOR SUPPORT
(a) Remove the 2 bolts and No. 2 radiator support from
the radiator.
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2GR-FE COOLING – RADIATORCO–35
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28. DISCONNECT INLET SUB-ASSEMBLY
(a) Disconnect the inlet hose from the radiator.
(b) Remove the bolt and inlet sub-assembly from the
radiator.
DISASSEMBLY
1. REMOVE RADIATOR WATER INLET
(a) Remove the 2 bolts and radiator water inlet.
2. REMOVE DRAIN PLUG
(a) Remove the drain plug and air drain plug.
(b) Remove the 2 O-rings.
3. REMOVE LOWER RADIATOR TANK
(a) Install the claw to the overhaul handle, inserting it in
the hole in Part A as shown in the illustration.
SST 09230-01010 (09231-01010, 09231-01030)
(b) While squeezing the handle, adjust the stopper bolt
so that dimension B is as specified below.
Dimension B:
0.2 to 0.3 mm (0.008 to 0.012 in.)
NOTICE:
If the stopper bolt is not adjusted, the claw may
be damaged.
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