o2 sensor TOYOTA HIGHLANDER 2001 Service Repair Manual

E74082
Multiplex Communication System
Power Window Master SW with ECUBody ECU
D12
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW
Front LH
D13
Door Key Lock and Unlock
SW Front RH
Door Lock Motor Front RH
Door Unlock Detection
SW Front RHD14
Door Lock Motor Rear LH
Door Unlock Detection SW
Rear LHB15
Back Door Lock Motor
Back Door Unlock
Detection SWD15
Door Lock Motor
Rear RH
Door Unlock Detection
SW Rear RH
Passenger Side J/B
Instrument Panel J/B7
P5
16
P5
3
P58
P5 IB21
GR Y5
IF3O6
B10 MPX1
10
B9
11
B10
17
B12MPX2
LSWP
LSWA LSSR
E1
2BR
LGBR
3
IA1
15
BH1B
BR7
BC1
GR
4
LSSR
E V
4
S
E
3 8
BG3 B A
AA A
BB
B J12
J/C
BB1 6
1GR
LSSR
E LSSR
E
56 BRIN22
W-B2
IN1W-B
IAW-B4L 10
4M6
14
1D4
1EW-BW-B
BB1
11
W-B
BAJ14
J/CA
BE13 BC1W-B
BB MPX1
MPX2
LSW
LSWE
23
W-B
W-B 05-1604
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DOOR LOCK POSITION CIRCUIT
CIRCUIT DESCRIPTION
This circuit detects the state of the door lock detection sensor and sends it to the multiplex network body
ECU.
WIRING DIAGRAM
05IQF-02

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- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SFI SYSTEM (2AZ-FE)
DEFINITION OF TERMS
TermDefinition
Monitor descriptionDescription of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).
Related DTCsA group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic.
Typical enabling condition
Preconditions that allow the ECM to detect malfunctions.
With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction
threshold(s).
Sequence of operation
The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-
tion.
When a sensor is being monitored, the next sensor or component will not be monitored until the current sensor
monitoring is finished.
Required sensor/compo-
nentsThe sensors and components that are used by the ECM to detect malfunctions.
Frequency of operation
The number of times that the ECM checks for malfunctions per driving cycle.
ºOnce per driving cycleº means that the ECM detects the malfunction only one time during a single driving cycle.
ºContinuousº means that the ECM detects the malfunction every time an enabling condition is met.
DurationThe minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a
DTC. This timing begins after the ºtypical enabling conditionsº are met.
Malfunction thresholdsBeyond this value, the ECM will conclude that there is a malfunction and set a DTC.
MIL operation
MIL illumination timing after a defect is detected.
ºImmediateº means that the ECM illuminates the MIL the instant the ECM determines that there is a malfunction.
º2 driving cyclesº means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd
driving cycle.

I38593
*1
*2
*3
I38594
*1
*2
*3
*4
- DIAGNOSTICSNAVIGATION SYSTEM
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Position information/*4
DisplayContents
PositionLatitude and longitude information on the current position is displayed.
Date information/*5
DisplayContents
DateThe date/time information obtained from GPS signal is displayed in Greenwich
mean time (GMT). The last 4 digits are displayed.
(c) Vehicle Signal Check Screen
Vehicle signal
DisplayContents
REV/*1REV signal ON/OFF state is displayed.
SPD/*2SPD signal condition is displayed.
Sensor signal
DisplayContents
Gyro sensor/*3Gyro sensor output condition is displayed (when the vehicle runs straight or is sta-
tionary, the voltage is approximately 2.5 V).
HINT:
Signals are updated once per second only when vehicle sensor signals are changed.
(d) Parts Information Screen
Screen description
DisplayContents
Navigation Manufacturer/*1Navigation ECU manufacturer is displayed.
Navigation Version No./*2Navigation ECU version is displayed.
Disc Manufacturer/*3Map disc manufacturer is displayed.
Disc Version No./*4Map disc version is displayed.

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- DIAGNOSTICSSFI SYSTEM (2AZ-FE)(From August, 2004)
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DATA LIST/ACTIIVE TEST/SYSTEM CHECK/SYSTEM CHECK
1. DATA LIST
HINT:
Using the hand-held tester DATA LIST allows switch, sensor, actuator and other item values to be read with-
out removing any parts. Reading the DATA LIST early in troubleshooting is one way to shorten labor time.
NOTICE:
In the table below, the values listed under ºNormal Conditionº are reference values. Do not depend
solely on the these reference values when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn ON the hand-held tester or the OBD II scan tool.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
(g) According to the display on tester, read the ºDATA LISTº.
Hand-held Tester DisplayMeasurement Item/Range
(Display)Normal Condition*Diagnostic Note
INJECTORInjection period/
Minimum: 0 ms, Maximum: 32.64 msIdling: 1.92 to 3.37 ms-
IGN ADVANCEIgnition timing advance/
Minimum: -64 deg., Maximum: 63.5 deg.Idling: BTDC 5 to 15 deg.-
CALC LOADCalculated load by ECM/
Minimum: 0 %, Maximum: 100 %
Idling: 3.3 to 26.7 %

Racing without load (2500 rpm):
12.0 to 14.7 %
-
MAFAir flow rate from MAF meter/
Minimum: 0 gm/s, Maximum: 655 gm/s

Idling:
0.58 to 4.67 gm/second

Racing without load (2,500 rpm):
3.33 to 9.17 gm/second
If value is approximately 0.0 gm/s:

Mass air flow meter power
source circuit open

VG circuit open or short
If value is 160.0 gm/s or more:

EVG circuit open
ENGINE SPDEngine Speed/
Minimum: 0 rpm, Maximum: 16,383 rpmIdling:
550 to 750 rpm-
COOLANT TEMPCoolant temperature/
Minimum: -40C, Maximum: 140CAfter warming up: 80 to 95°C
(176 to 203°F)

If value is -40C (-40F): sensor
circuit is open

If value is 140C (284F) or
more:
sensor circuit is shorted
INTAKE AIRIntake air temperature/
Minimum: -40C, Maximum: 140CEquivalent to ambient temperature
(after cold soak)

If value is -40C (-40F): sensor
circuit is open

If value is 140C (284F) or
more:
sensor circuit is shorted
THROTTLE POSAbsolute throttle position sensor/
Minimum: 0 %, Maximum: 100 %
Throttle fully closed: 6 to 16 %

Throttle fully open: 64 to 98 %Read value with ignition switch ON
(do not start engine)
CTP SWClosed throttle position switch/
ON or OFF
Throttle fully closed: ON

Throttle open: OFF-
VEHICLE SPDVehicle speed/
Minimum: 0 km/h, Maximum: 255 km/hVehicle stopped: 0 km/h (0 mph)Speed indicated on speedometer
ACCEL POS #1
Accelerator pedal position sensor No.1
output voltage/
Minimum: 0 V, Maximum: 5 V
Accelerator released:
0.5 to 1.1 V

Accelerator depressed:
2.6 to 4.5 V
Read value with ignition switch ON
(do not start engine)
ACCEL POS #2
Accelerator pedal position sensor No. 2
output voltage/
Minimum: 0 V, Maximum: 5 V
Accelerator released:
1.2 to 2.0 V

Accelerator depressed:
3.4 to 5.3 V
Read value with ignition switch ON
(do not start engine)

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Hand-held Tester DisplayDiagnostic Note Normal Condition* Measurement Item/Range
(Display)
THROTTLE POS #2Throttle position sensor No. 2 output volt-
age/ Minimum: 0 V, Maximum: 5 V
Throttle fully closed: 2.1 to 3.1 V

Throttle fully open: 4.5 to 5.5 VRead value with ignition switch ON
(do not start engine)
THROTTLE TARGTTarget position of throttle valve/
Minimum: 0 V, Maximum: 5 VIdling: 0.4 to 1.1 VRead value with ignition switch ON
(do not start engine)
THROTTLE OPN DUTYThrottle actuator opening duty ratio/
Minimum: 0 %, Maximum: 100 %Throttle fully closed: 0 %

When accelerator pedal is de-
pressed, duty ratio is increased

Read value with ignition switch
ON (do not start engine)
THROTTLE CLS DUTYThrottle actuator closed duty ratio/
Minimum: 0 %, Maximum: 100 %Throttle fully open: 0 %

When accelerator pedal is quick
released, duty ratio is increased

Read value with ignition switch
ON (do not start engine)
THROTTLE MOTWhether or not throttle actuator control is
permitted/ ON or OFFIdling: ONRead value with ignition switch ON
(do not start engine)
+BM
Whether or not electric throttle control
system power is input/
ON or OFF
Idling: ON-
VAPOR PRESS
Vapor Pressure/
Minimum: 97.175 kPa, Maximum:
103.425 kPa
Usable range: 60 to 110 kPaPressure inside of fuel tank as
read by vapor pressure sensor
O2S B1 S2
Oxygen sensor output voltage of the
bank 1 sensor 2/
Minimum: 0 V, Maximum: 1.275 V
Idling: 0.1 to 0.9 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables technician to check volt-
age output of each sensor
AFS B1 S1
A/F sensor output voltage of the bank 1
sensor 1/
Minimum: 0 V, Maximum: 7.999 V
Idling: 2.8 to 3.8 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables technician to check volt-
age output of each sensor
ACCEL IDL POS
Whether or not accelerator pedal position
sensor is detecting idle/
ON or OFF
Idling: ON'
THROTTLE IDL POS
Whether or not throttle position sensor is
detecting idle/
ON or OFF
Idling: ON'
FAIL #1Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON'
FAIL #2Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON'
THROTTLE INITIAL
Throttle fully closed
(learned value)
Minimum: 0 V, Maximum: 5 V
0.5 to 0.9 V'
ACCEL LEARN VAL
Accelerator fully closed
(learned value)
Minimum: 0 V, Maximum: 5 V
0.4 to 0.8 V'
THROTTLE MOTThrottle motor current
Minimum: 0 A, Maximum: 20 AIdling: 0 to 3.0 A'
SHORT FT #1Short term fuel trim of bank 1/
Minimum: -100 %, Maximum: 100 %0 ± 20 %
This item is short-term fuel com-
pensation used to maintain air-fuel
ratio at stoichiometric air-fuel ratio
LONG FT #1Long term fuel trim of bank 1/
Minimum: -100 %, Maximum: 100 %0 ± 20 %
This item is overall, long-term fuel
compensation that helps to main-
tain air-fuel ratio at stoichiometric
air fuel ratio (steadies long term
deviations of short-term fuel trim
from central value).
TOTAL FT #1Total fuel trim of bank 1/
Minimum: 0.5, Maximum: 1.496Idling: 0.5 to 1.4-

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)(From August, 2004)
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Hand-held Tester DisplayDiagnostic Note Normal Condition* Measurement Item/Range
(Display)
AF FT B1 S1
Short term fuel trim associated with bank
1, sensor 1/
Minimum: 0, Maximum: 1.999

Value less than 1 (0.000 to
0.999) = LEAN

Stoichiometric Air-Fuel Ratio=1

Value greater than 1 (1.001 to
1.999) = RICH
-
FUEL SYS #1
Fuel system status (Bank 1) /
OL or CL or OL DRIVE or
OL FAULT or CL FAULT
Idling after warming up: CL

OL (Open Loop) : Has not yet sa-
tisfied conditions to go closed
loop

CL (Closed Loop) : Using heated
oxygen sensor(s) as feed back
for fuel control

OL DRIVE: Open loop due to
driving conditions (fuel enrich-
ment)

OL FAULT: Open loop due to de-
tected system fault

CL FAULT: Closed loop but one
of heated oxygen sensors, which
is used for fuel control, is mal-
functioning
FC IDLIdle fuel cut/ ON or OFFFuel cut operation: ON
FC IDL = ON when throttle valve
is fully closed and engine speed is
over 1,500 rpm
MILMIL status/ ON or OFFMIL ON: ON-
STARTER SIGStarter signal/ ON or OFFCranking: ON-
A/C SIGA/C signal/ ON or OFFA/C ON: ON-
PNP SW [NSW]PNP switch signal/ ON or OFFP or N position: ON-
ELECT LOAD SIGElectrical load signal/ ON or OFFDefogger switch ON: ON-
STOP LIGHT SWStop lamp switch/ ON or OFF
Brake pedal depressed: ON

Brake pedal released: OFF-
PS OIL PRESS SWPower steering signal/ ON or OFF

While turning steering wheel: ON

While not turning steering wheel:
OFFIdle-up control is performed when
PS is ON
PS SIGNALPower steering signal/
ON or OFFWhen steering wheel is turnedThis signal is usually ON until Igni-
tion switch is turned OFF
FUEL PUMP / SPDFuel pump / speed status /
ON/H or OFF/M,LIdling: ON-
A/C MAG CLUTCHA/C magnet clutch status /
ON or OFFA/C magnet clutch ON: ON-
EVAP VSVEVAP VSV status control /
ON or OFFVSV operating: ONEVAP VSV is controlled by ECM
(ground side duty control)
VVT CTRL B1VVT control status (Bank 1) /
ON or OFFVVT system operation: ON-
IGNITIONIgnition counter/ Minimum: 0,
Maximum: 4000 to 400-
CYL #1, #2, #3, #4Misfire ratio of cylinder 1 to 4/
Minimum: 0 %, Maximum: 50 %0 %This item is displayed in only idling
MISFIRE LOADEngine load for first misfire range/
Minimum: 0 g/rev, Maximum: 3.98 g/rev.Misfire 0: 0 g/rev.'
MISFIRE RPMEngine RPM for first misfire range/
Minimum: 0 rpm, Maximum: 6,375 rpmMisfire 0: 0 rpm'
FC TAUFuel Cut TAU: Fuel cut during very light
load/ ON or OFFFuel cut operating: ON
Fuel cut is being performed under
very light load to prevent engine
combustion from becoming incom-
plete
CHECK MODECheck mode/ ON or OFFCheck mode ON: ONSee page 05-40

05-46
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)(From August, 2004)
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HINT:
*: If no conditions are specifically stated for ºldlingº, the shift lever is in the N or P position, the A/C switch
is OFF and all accessory switches are OFF.
2. ACTIVE TEST
HINT:
Performing the hand-held tester ACTIVE TEST allows relay, VSV, actuator and other items to be operated
without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to shorten
labor time. The DATA LIST can be displayed during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn ON the hand-held tester or the OBD II scan tool.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(g) According to the display on tester, perform the ºACTIVE TEST.
Hand-held Tester DisplayTest DetailsDiagnostic Note
INJ VOL
[Test Details]
Control injection volume
Minimum: -12.5 %, Maximum: 25 %
[Vehicle Condition]
Engine speed: 3000 rpm or less
All injectors are tested at once

Injection volume is gradually
changed between -12.5 and 25
%
A/F CONTROL
[Test Details]
Control injection volume
-12.5 or 25 % (change the injection volume -12.5 % or 25 %)
[Vehicle Condition]
Engine speed: 3000 rpm or less
Following A/F CONTROL proce-
dure enables technician to check
and graph voltage outputs of both
A/F sensor and heated oxygen
sensor
For displaying the graph, enter
ºACTIVE TEST / A/F CONTROL /
USER DATAº, select ºAFS B1S1
and O2S B1S2º by pressing ºYESº
and push ºENTERº, Then press
ºF4º
EVAP VSV (ALONE)
[Test Details]
Activate EVAP VSV control
ON or OFF
-
A/C MAG CLUTCH
[Test Details]
Control A/C magnet clutch
ON or OFF
-
FUEL PUMP / SPD
[Test Details]
Control fuel pump
ON or OFF
-
VCUUM PUMP (ALONE)
[Test Details]
Vacuum pump
ON or OFF
-
VENT VALVE (ALONE)
[Test Details]
Vent valve
ON or OFF
-
VVT CTRL B1
[Test Details]
Activate VVT system (Bank 1)
ON or OFF
ON: Rough idle or engine stall

OFF: Normal engine speed
TC/TE1
[Test Details]
Connect TC and TE1
ON or OFF
-
FC IDL PROHBT
[Test Details]
Control idle fuel cut prohibit
ON or OFF
-

05EXA-04
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DATA LIST/ACTIVE TEST
1. DATA LIST
HINT:
Using the hand-held tester DATA LIST allows switch, sensor, actuator and other item values to be read with-
out removing any parts. Reading the DATA LIST early in troubleshooting is one way to shorten labor time.
NOTICE:
In the table below, the values listed under ºNormal Conditionº are reference values. Do not depend
solely on these reference values when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn ON the hand-held tester.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
(g) According to the display on tester, read the ºDATA LISTº.
Hand-held Tester DisplayMeasurement Item/Range
(Display)Normal Condition *Diagnostic Note
INJECTOR
Injection period of the No. 1 cylin-
der/
Minimum: 0 ms, Maximum: 32.64
ms
Idling: 1.5 to 2.8 ms'
IGN ADVANCE
Ignition timing advance for No. 1
cylinder/
Minimum: -64 deg., Maximum:
63.5 deg.
Idling: BTDC 5 to 25°'
CALC LOADCalculated load by ECM/
Minimum: 0 %, Maximum: 100 %
Idling: 10.4 to 15.6 %

Running without load (2,500
rpm): 12.1 to 18.2 %
'
MAF
Air flow rate from MAF meter/
Minimum: 0 gm/s, Maximum: 655
gm/s
Idling: 2.0 to 3.7 gm/s

Running without load (2,500
rpm): 2.4 to 4.3 gm/s
If value is approximately 0.0 gm/s:

Mass air flow meter power
source circuit open

VG circuit open or short
If value is 160.0 gm/s or more:

E2G circuit open
ENGINE SPD
Engine speed/
Minimum: 0 rpm, Maximum:
16,383 rpm
Idling: 580 to 750 rpm'
COOLANT TEMP
Coolant temperature/
Minimum: -40C, Maximum:
140CAfter warming up: 80 to 97°C
(176 to 207°F)
If value is -40C (-40F): sensor
circuit is open
INTAKE AIR
Intake air temperature/
Minimum: -40C, Maximum:
140CEquivalent to ambient temp.
(after cold soak)
circuit is oen

If value is 140C (284F or
more): sensor circuit is shorted
THROTTLE POSAbsolute throttle position sensor/
Minimum: 0 %, Maximum: 100 %
Throttle fully closed: 10 to 24 %

Throttle fully open: 64 to 96 %Read value with ignition switch ON
(do not start engine)
CTP SWClosed throttle position switch/
ON or OFF
Throttle fully closed: ON

Throttle open: OFF'
VEHICLE SPD
Vehicle speed/
Minimum: 0 km/h, Maximum: 255
km/h
Actual vehicle speedSpeed indicated on speedometer
ACCEL POS #1
Accelerator pedal position sensor
No.1 output voltage/
Minimum: 0 V, Maximum: 5 V
Accelerator pedal released:
0.5 to 1.1 V

Accelerator pedal depressed:
2.6 to 4.5 V
Read value with ignition switch ON
(do not start engine)

- DIAGNOSTICSSFI SYSTEM (3MZ-FE)(From August, 2004)
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Hand-held Tester DisplayDiagnostic Note Normal Condition * Measurement Item/Range
(Display)
ACCEL POS #2
Accelerator pedal position sensor
No. 2 output voltage/
Minimum: 0 V, Maximum: 5 V
Accelerator pedal released:
1.2 to 2.0 V

Accelerator pedal depressed:
3.4 to 5.3 V
Read value with ignition switch ON
(do not start engine)
THROTTLE POS #2
Throttle position sensor No. 2 out-
put voltage/ Minimum: 0 V, Maxi-
mum: 5 V
Throttle fully closed: 2.1 to 3.1 V

Throttle fully open: 4.5 to 5.5 VRead value with ignition switch ON
(do not start engine)
THROTTLE TARGTTarget position of throttle valve/
Minimum: 0 V, Maximum: 5 VIdling: 0.4 to 1.1 V'
THROTTLE OPN DUTYThrottle motor opening duty ratio/
Minimum: 0 %, Maximum: 100 %Throttle fully closed: 0 %

When accelerator pedal is de-
pressed, duty ratio is increased

Read value with ignition switch
ON
(do not start engine)
THROTTLE CLS DUTYThrottle motor closed duty ratio/
Minimum: 0 %, Maximum: 100 %Throttle fully open: 0 %

When accelerator pedal is re-
leased quickly, duty ratio is in-
creased

Read the value with ignition
switch ON
(do not start engine)
THROTTLE MOTWhether or not throttle motor con-
trol is permitted/ ON or OFFIdling: ONRead value with ignition switch ON
(do not start engine)
+BM
Whether or not electric throttle
control system power is inputted/
ON or OFF
Idling: ON'
ACCEL IDL POS
Whether or not accelerator pedal
position sensor is detecting idle/
ON or OFF
Idling: ON'
THROTTLE IDL POS
Whether or not throttle position
sensor is detecting idle/
ON or OFF
Idling: ON'
FAIL #1Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON'
FAIL #2Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON'
THROTTLE INITIAL
Throttle fully closed
(learned value)
Minimum: 0 V, Maximum: 5 V
0.5 to 0.9 V'
ACCEL LEARN VAL
Accelerator fully closed
(learned value)
Minimum: 0 V, Maximum: 5 V
0.4 to 0.8 V'
THROTTLE MOTThrottle motor current
Minimum: 0 A, Maximum: 20 AIdling: 0 to 3.0 A'
O2S B1 S2
Heated oxygen sensor output volt-
age for bank 1 sensor 2/
Minimum: 0 V, Maximum: 1.0 VDriving (31 mph, 50 km/h):
0.1 to 0.9 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
voltage output of each sensor
O2S B2 S2
Heated oxygen sensor output volt-
age for bank 2 sensor 2/
Minimum: 0 V, Maximum: 1.0 VDriving (31 mph, 50 km/h):
0.1 to 0.9 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
voltage output of each sensor
AFS B1 S1
A/F sensor output voltage for bank
1 sensor 1/
Minimum: 0 V, Maximum: 7.999 V
Idling 2.8 to 3.8 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
voltage output of each sensor

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Hand-held Tester DisplayDiagnostic Note Normal Condition * Measurement Item/Range
(Display)
AFS B2 S1
A/F sensor output voltage for bank
2 sensor 1/
Minimum: 0 V, Maximum: 7.999 V
Idling 2.8 to 3.8 V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
voltage output of each sensor
VAPOR PRESS
Vapor Pressure/
Minimum: -4.125 kPa, Maximum:
2.125 kPa
Fuel tank cap removed: 0 kPaPressure inside of fuel tank as
read by the vapor pressure sensor
SHORT FT #1
Short term fuel trim of bank 1/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %
This item is short-term fuel com-
pensation used to maintain air-fuel
ratio at stoichiometric air-fuel ratio
LONG FT #1
Long term fuel trim of bank 1/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %
This item is overall, long-term fuel
compensation that helps to main-
tain air-fuel ratio at stoichiometric
air-fuel ratio (steadies long term
deviations of short-term fuel trim
from central value)
TOTAL FT #1
Total fuel trim of bank 1:
Average value for fuel trim system
of bank 1/
Minimum: 0.5, Maximum: 1.496
Idling: 0.5 to 1.4'
SHORT FT #2
Short term fuel trim of bank 2/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %
This item is short-term fuel com-
pensation used to maintain air-fuel
ratio at stoichiometric air-fuel ratio
LONG FT #2
Long term fuel trim of bank 2/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %
This item is overall, long-term fuel
compensation that helps to main-
tain air-fuel ratio at stoichiometric
air-fuel ratio (steadies long term
deviation of short-term fuel trim
from central value)
TOTAL FT #2
Total fuel trim of bank 2:
Average value for fuel trim system
of bank 2/
Minimum: 0.5, Maximum: 1.496
Idling: 0.5 to 1.4'
O2FT B1 S2
Short term fuel trim associated
with the bank 1 sensor 2/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %Same as SHORT FT #1
O2FT B2 S2
Short term fuel trim associated
with the bank 2 sensor 2/
Minimum: -100 %, Maximum: 100
%
0 ± 20 %Same as SHORT FT #2
AF FT B1 S1
Short term fuel trim associated
with bank 1 sensor 1/
Minimum: 0, Maximum: 1.999

Value less than 1 (0.000 to
0.999) = Lean

Stoichiometric air-fuel ratio = 1

Value greater than 1 (1.001 to
1.999) = Rich
'
AF FT B2 S1
Short term fuel trim associated
with bank 2 sensor 1/
Minimum: 0, Maximum: 1.999
Lean: 0
AF FT B2 S1 < 1

Stoichiometric air-fuel ratio = 1

Rich: 1
AF FT B2 S1< 1.999
'