coolant capacity TOYOTA SIENNA 2007 Service Repair Manual

PREPARATION – 2GR-FE COOLINGPP–15
PP
COOLANT
Capacity Classification
11.3 liters (12.0 US qts, 10.0 Imp. qts) Use only "TOYOTA Super Long Life Coolant" or similar high quality
ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate
coolant with long-life hybrid organic acid technology (coolant with
long-life hybrid organic acid technology consists of a combination of
low phosphates and organic acids).

ES–2582GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its
efficiency. The first sensor, an Air Fuel ratio (A/F) sensor, sends pre-catalyst A/F ratio information to the
ECM. The second sensor, a heated oxygen sensor (O2S), sends post-catalyst information to the ECM.
The ECM compares these 2 signals to judge the efficiency of the catalyst and the catalyst's ability to store
oxygen. During normal operation, the TWC stores and releases oxygen as needed. The capacity to store
oxygen results in a low variation in the post-TWC exhaust stream.
If the catalyst is functioning normally, the waveform of the heated oxygen sensor slowly switches between
RICH and LEAN. If the catalyst is deteriorated, the waveform will alternate frequently between RICH and
LEAN. As the catalyst efficiency degrades, its ability to store oxygen is reduced and the catalyst output
becomes more variable. When running the monitor, the ECM compares sensor 1 signals (A/F sensor)
over a specific amount of time to determine catalyst efficiency. The ECM begins by calculating the signal
length for both sensors (for the rear oxygen sensor, the ECM uses the output voltage signal length). If the
oxygen sensor output voltage signal length is greater than the threshold (threshold is calculated based on
the A/F sensor signal length), the ECM concludes that the catalyst is malfunctioning. The ECM will turn on
the MIL and a DTC will be set.
HINT:
• Bank 1 refers to the bank that includes cylinder No. 1.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Sensor 1 refers to the sensor closest to the engine assembly.
• Sensor 2 refers to the sensor farthest away from the engine assembly.
MONITOR STRATEGY
DTC P0420Catalyst System Efficiency Below Threshold
(Bank 1)
DTC P0430Catalyst System Efficiency Below Threshold
(Bank 2)
DTC No. DTC Detection Condition Trouble Area
P0420Oxygen Storage Capacity (OSC) value is smaller than
standard value under active air-fuel ratio control (2 trip
detection logic)• Gas leakage from exhaust system
• A/F sensor (bank 1 sensor 1)
• HO2 sensor (bank 1 sensor 2)
• Exhaust manifold (TWC)
P0430OSC value is smaller than standard value under active
air-fuel ratio control (2 trip detection logic)• Gas leakage from exhaust system
• A/F sensor (bank 2 sensor 1)
• HO2 sensor (bank 2 sensor 2)
• Exhaust manifold (TWC)
Related DTCsP0420: Catalyst Deterioration
P0430: Catalyst Deterioration
Required Sensors / Components (Main) TWC
Required Sensors / Components (Related)A/F sensor, heated oxygen sensor, intake air temperature sensor, mass air flow
meter, crankshaft position sensor and engine coolant temperature sensor
Frequency of Operation Once per driving cycle
Duration Approximately 30 seconds
MIL Operation 2 driving cycles
Sequence of Operation None

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–173
ES
TYPICAL ENABLING CONDITIONS
All:
Heated Oxygen Sensor Output Voltage (Output Voltage, High Voltage and Low Voltage):
Heated Oxygen Sensor Impedance (Low):
Heated Oxygen Sensor Impedance (High):
Heated Oxygen Sensor Output Voltage (Extremely High):
TYPICAL MALFUNCTION THRESHOLDS
Heated Oxygen Sensor Output Voltage (Output voltage):
Heated Oxygen Sensor Output Voltage (Low output voltage):
The monitor will run whenever these DTCs are not
presentP0031, P0032, P0051, P0052 (A/F Sensor Heater Sensor 1), P0100, P0101, P0102,
P0103 (MAF Sensor), P0110, P0112, P0113 (IAT Sensor), P0115, P0116, P0117,
P0118 (ECT Sensor), P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135
(TP Sensor), P0125 (Insufficient ECT for Closed Loop), P0171, P0172 (Fuel
System), P0300, P0301, P0302, P0303, P0304, P0305, P0306 (Misfire), P0335
(CKP Sensor), P0340 (CMP Sensor), P0500 (VSS), P2196, P2198 (A/F Sensor
(Rationality)), P2A00, P2A03 (A/F Sensor (Slow Response))
Active air-fuel ratio control Performing
Active air-fuel ratio control is performed when the
following conditions are met:-
Battery voltage 11 V or more
Engine coolant temperature 75
C (167F) or more
Idle OFF
Engine RPM Less than 3200 rpm
A/F sensor status Activated
Fuel system status Closed loop
Fuel-cut OFF
Engine load 10 to 70%
Shift position 4th or more
Battery voltage 11 V or more
Estimated HO2S temperature Less than 700
C (1292F)
ECM monitor Completed
DTC P0606 Not set
Battery voltage 11 V or more
Estimated HO2S temperature 450
C (842F) or more
DTC P0606 Not set
Battery voltage 11 V or more
Time after engine start 2 seconds or more
Either of the following conditions is met: 1 or 2
1. All of the following conditions (a), (b) and (c) are met -
(a) Commanded air-fuel ratio 14.3 or less
(b) Rear HO2 sensor voltage 0.21 to 0.59 V
(c) OSC (Oxygen Storage Capacity of Catalyst) 2.0 g (0.0044 lb) or more
2. All of the following conditions (d), (f) and (g) are met. -
(d) Commanded air-fuel ratio 14.9 or more
(f) Rear HO2 sensor voltage 0.21 to 0.59 V
(g) OSC 2.0 g (0.0044 lb) or more
All of the following conditions (a), (b) and (c) are met. -
(a) Commanded air-fuel ratio 14.3 or less

2GR-FE COOLING – COOLANTCO–7
CO
4. ADD ENGINE COOLANT
(a) Tighten the radiator drain cock plug by hand.
(b) Tighten the 2 cylinder block drain cock plugs.
Torque: 13 N*m (130 kgf*cm, 9 ft.*lbf) for
cylinder block drain cock plugs
(c) Remove the air drain cock plug from the water inlet
housing.
(d) Loosen the air drain plug at the top of the radiator 3
or 4 turns.
(e) Add TOYOTA Super Long Life Coolant (SLLC) to
the radiator inlet opening until coolant overflows
from the engine air drain cock hole. Then install the
air drain cock plug to the water inlet housing.
Torque: 13 N*m (130 kgf*cm, 9 ft.*lbf) for air
drain cock plug
(f) Continue to add TOYOTA Super Long Life Coolant
(SLLC) to the radiator inlet opening until coolant
overflows from the radiator air drain hole. Then
close the air drain plug at the top of the radiator.
HINT:
If the coolant level at the radiator inlet opening
drops after squeezing the No. 1 and No. 2 radiator
hoses, add coolant.
(g) Slowly fill the radiator with TOYOTA Super Long Life
Coolant (SLLC).
Standard capacity:
11.3 liters (12.0 US qts, 10.0 Imp. qts)
HINT:
• TOYOTA vehicles are filled with TOYOTA SLLC
at the factory. In order to avoid damage to the
engine cooling system and other technical
problems, only use TOYOTA SLLC or similar
high quality ethylene glycol based non-silicate,
non-amine, non-nitrite, non-borate coolant with
long-life hybrid organic acid technology (coolant
with long-life hybrid organic acid technology
consists of a combination of low phosphates and
organic acids).
• Contact your TOYOTA dealer for further details.
NOTICE:
Never use water as a substitute for engine
coolant.
(h) Slowly pour coolant into the radiator reservoir tank
until it reaches the FULL line.
(i) Squeeze the No. 1 and No. 2 radiator hoses several
times by hand, and then check the level of the
coolant.
If the coolant level is low, add coolant.
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