2007 TOYOTA SIENNA battery capacity

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–259
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page ES-19).
CONDITIONING FOR SENSOR TESTING
HINT:
Perform the operation with the engine speeds and durations described below prior to checking the
waveforms of the A/F and HO2 sensors. This is in order to activate the sensors sufficiently to obtain the
appropriate inspection results.
The monitor will run whenever these DTCs are not
presentP0011, P0012 (VVT System 1-Advance, Retard), P0021, P0022 (VVT System 2-
Adavance, Retard), P0031, P0032, P0051, P0052 (A/F Sensor Heater Sensor 1),
P0037, P0038, P0057, P0058 (O2 Sensor heater Sensor 2), P0100, P0101, P0102,
P0103 (MAF Sensor), P0115, P0116, P0117, P0118 (ECT Sensor), P0120, P0121,
P0122, P0123, P0220, P0222, P0223 , P2135 (TP Sensor), P0125 (Insufficient ECT
for Closed Loop), P0136, P0156 (O2 Sensor 2), P0171,P0172 (Fuel System),
P0300, P0301, P0302, P0303, P0304, P0305, P0306 (Misfire), P0335 (CKP
Sensor), P0340 (CMP Sensor), P0351, P0352, P0353, P0354, P0355, P0356
(Ignitor), P0500 (VSS), P2196, P2198 (A/F Sensor (Rationality)), P2A00, P2A03 (A/
F Sensor (Slow Response))
Battery voltage 11 V or more
IAT -10
C (14F) or more
ECT 75
C (167F) or more
Atmospheric pressure 0.75 or more
Idle OFF
Engine RPM Less than 3200 rpm
A/F sensor Activated
Fuel system status Closed loop
Engine load 10 to 70%
All of the following conditions are met Conditions 1, 2 and 3
1. Mass air flow rate 5 to 60 g/sec.
2. Front catalyst temperature (estimated) 600 to 750
C (1112 to 1382F)
3. Rear catalyst temperature (estimated) 100 to 900
C (212 to 1652F)
Rear HO2S monitor Completed
Shift position 4th or more
Oxygen Storage Capacity (OSC) of catalyst Less than 0.046 g (0.000101 lb)

ES–1182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
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 furthest away from the engine assembly.
MONITOR DESCRIPTION
The sensing position of the Heated Oxygen (HO2) sensor has a zirconia element which is used to detect
the oxygen concentration in the exhaust gas. If the zirconia element is at the appropriate temperature,
and the difference between the oxygen concentrations surrounding the inside and outside surfaces of the
sensor is large, the zirconia element generates voltage signals. In order to increase the oxygen
concentration detecting capacity of the zirconia element, the ECM supplements the heat from the exhaust
with heat from a heating element inside the sensor.
Heated oxygen sensor heater range check (P0037, P0038, P0057 and P0058):
The ECM monitors the current applied to the O2 sensor heater to check the heater for malfunctions. If the
current is below the threshold value, the ECM will determine that there is an open circuit in the heater. If
the current is above the threshold value, the ECM will determine that there is a short circuit in the heater.
Example:
The ECM sets DTC P0038 or P0058 when the current in the HO2 sensor heater is more than 2 A.
Conversely, when the heater current is less than 0.3 A, DTC P0037 or P0057 is set.
Heated oxygen sensor heater performance (P0141 and P0161):
After the accumulated heater ON time exceeds 100 seconds, the ECM calculates the heater resistance
using the battery voltage and the current applied to the heater. If the resistance is above the threshold
value, the ECM will determine that there is a malfunction in the HO2S heater and set DTC P0141 and
P0161.
MONITOR STRATEGY
DTC No. DTC Detection Condition Trouble Area
P0037
P0057Heated Oxygen (HO2) sensor heater current is less
than 0.3 A (1 trip detection logic)• Open in HO2 sensor heater circuit
• HO2 sensor heater
• EFI relay
•ECM
P0038
P0058Heated Oxygen (HO2) sensor heater current is more
than 2 A (1 trip detection logic)• Open in HO2 sensor heater circuit
• HO2 sensor heater
• EFI relay
•ECM
P0141
P0161Cumulative heater resistance correction value exceeds
the acceptable threshold (2 trip detection logic)• HO2 sensor
•ECM
Related DTCsP0037: Heated oxygen sensor heater (bank 1) open/short (Low electrical current)
P0038: Heated oxygen sensor heater (bank 1) open/short (High electrical current)
P0057: Heated oxygen sensor heater (bank 2) open/short (Low electrical current)
P0058: Heated oxygen sensor heater (bank 2) open/short (High electrical current)
P0141: Heated oxygen sensor heater performance (bank 1 sensor 2)
P0161: Heated oxygen sensor heater performance (bank 2 sensor 2)
Required Sensors / Components (Main) Heated oxygen sensor heater (bank 1 and 2)
Required Sensors / Components (Related) Vehicle speed sensor
Frequency of Operation Continuous
Duration0.5 seconds: P0037 and P0057
1 second: P0038 and P0058
10 seconds: P0141 and P0161
MIL OperationImmediate: P0037, P0038, P0057 and P0058
2 driving cycles: P0141 and P0161
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