ECU NISSAN TEANA 2008 Service Manual

EC-274
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1572 ASCD BRAKE SWITCH
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> Go to EC-274, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
2. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> Go to EC-274, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856755
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
VHCL SPEED SE More than 30 km/h (19 mph)
Selector lever Suitable position
Driving locationDepress the brake pedal for more than 5
seconds so as not to come off from the
above-mentioned vehicle speed.
Monitor item Condition Indication
BRAKE SW1 Brake pedalSlightly depressed OFF
Fully released ON
ECM
Condition Voltage +−
Connector Terminal Connector Terminal
E1611 0
(ASCD brake switch signal)E16 112 Brake pedalSlightly depressed Approx. 0V
Fully released Battery voltage

ECM
EC-357
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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ECU DIAGNOSIS
ECM
Reference ValueINFOID:0000000003856868
VALUES ON THE DIAGNOSIS TOOL
Remarks:
l Specification data are reference values.
l Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.
Monitor Item Condition Values/Status
ENG SPEED Run engine and compare CONSULT-III value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-124, "
Description".
B/FUEL SCHDL See EC-124, "
Description".
A/F ALPHA-B1 See EC-124, "
Description".
A/F ALPHA-B2 See EC-124, "
Description".
COOLAN TEMP/S  Engine: After warming up More than 70°C (158°F)
A/F SEN1 (B1)  Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
A/F SEN1 (B2)  Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load0 - 0.3 V ←→ Approx. 0.6 -
1.0 V
HO2S2 (B2) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load0 - 0.3 V ←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadLEAN ←→ RICH
HO2S2 MNTR (B2) Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadLEAN ←→ RICH
VHCL SPEED SE Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
speedometer indication
BATTERY VOLT  Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
ACCEL SEN 2*
1 Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V

EC-358
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
TP SEN 1-B1 Ignition switch: ON
(Engine stopped)
 Selector lever: DAccelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1*
1 Ignition switch: ON
(Engine stopped)
 Selector lever: DAccelerator pedal: Fully released More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
INT/A TEMP SE  Ignition switch: ONIndicates intake air tempera-
ture
START SIGNAL  Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW  Ignition switch: ONSelector lever: P or N ON
Selector lever: Except above OFF
PW/ST SIGNAL Engine: After warming up, idle the
engineSteering wheel: Not being turned OFF
Steering wheel: Being turned ON
LOAD SIGNAL  Ignition switch: ONRear window defogger switch: ON
and/or
Lighting switch: 2nd positionON
Rear window defogger switch and lighting
switch: OFFOFF
IGNITION SW  Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW Engine: After warming up, idle the
engineHeater fan switch: ON ON
Heater fan switch: OFF OFF
BRAKE SW  Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
INJ PULSE-B2 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 7° - 17° BTDC
2,000 rpm 25° - 45° BTDC
CAL/LD VALUE Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 5% - 35%
2,500 rpm 5% - 35%
MASS AIRFLOW Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 2.0 - 6.0 g·m/s
2,500 rpm 7.0 - 20.0 g·m/s
PURG VOL C/V Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)0%
2,000 rpm — Monitor Item Condition Values/Status

ECM
EC-359
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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INT/V TIM (B1) Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 30°CA
INT/V TIM (B2) Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 30°CA
INT/V SOL (B1) Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 0% - 2%
2,000 rpm Approx. 0% - 50%
INT/V SOL (B2) Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadIdle 0% - 2%
2,000 rpm Approx. 0% - 50%
VIAS S/V-1 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadWhen revving engine up to 5,000 rpm
quicklyOFF →ON → OFF
VIAS S/V-2 Engine: After warming up
 Selector lever: P or N
 Air conditioner switch: OFF
No loadWhen revving engine up to 5,000 rpm
quicklyOFF →ON → OFF
AIR COND RLY Engine: After warming up, idle the
engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
ENGINE MOUNT  Engine: After warming upBelow 950 rpm IDLE
Above 950 rpm TRVL
FUEL PUMP RLY For 1 second after turning ignition switch: ON
 Engine running or crankingON
 Except above OFF
THRTL RELAY  Ignition switch: ON ON
COOLING FAN Engine: After warming up, idle the
engine
 Air conditioner switch: OFFEngine coolant temperature: 97°C
(206°F) or lessOFF
Engine coolant temperature: Between
98°C (208°F) and 99°C (210
°F)LOW
Engine coolant temperature: Between
100°C (212°F) and 104°C (219°F)MID
Engine coolant temperature: 105°C
(221°F) or moreHI
HO2S2 HTR (B1) Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadON
 Engine speed: Above 3,600 rpm OFF
HO2S2 HTR (B2) Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadON
 Engine speed: Above 3,600 rpm OFF
I/P PULLY SPD  Vehicle speed: More than 20km/h (12 MPH)Almost the same speed as
the tachometer indication
VEHICLE SPEED Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
the speedometer indication Monitor Item Condition Values/Status

EC-360
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
IDL A/V LEARN  Engine: RunningIdle air volume learning has not been per-
formed yet.YET
Idle air volume learning has already been
performed successfully.CMPLT
ENG OIL TEMP  Engine: After warming up More than 70°C (158°F)
TRVL AFTER MIL  Ignition switch: ONVehicle has traveled after MI has illumi-
nated.0 - 65,535 km
(0 - 40,723 miles)
A/F S1 HTR (B1) Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)4 - 100%
A/F S1 HTR (B2) Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)4 - 100%
AC PRESS SEN Engine: Idle
 Both A/C switch and blower fan switch: ON (Compressor operates)1.0 - 4.0 V
VHCL SPEED SE Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
the speedometer indication
SET VHCL SPD  Engine: Running ASCD: OperatingThe preset vehicle speed is
displayed
MAIN SW  Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW  Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW  Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch: Re-
leasedOFF
SET SW  Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
BRAKE SW1
(ASCD brake switch) Ignition switch: ONBrake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2
(Stop lamp switch) Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
VHCL SPD CUT  Ignition switch: ON NON
LO SPEED CUT  Ignition switch: ON NON
AT OD MONITOR  Ignition switch: ON OFF
AT OD CANCEL  Ignition switch: ON OFF
CRUISE LAMP  Ignition switch: ONMAIN switch: Pressed at the 1st time →
at the 2nd timeON → OFF
SET LAMP MAIN switch: ON
 When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)ASCD: Operating ON
ASCD: Not operating OFF
ALT DUTY  Engine: Idle 0 - 80%
A/F ADJ-B1  Engine: Running−0.330 - 0.330
A/F ADJ-B2  Engine: Running−0.330 - 0.330
BAT CUR SEN Engine speed: Idle
 Battery: Fully charged*
2
 Selector lever: P or N
 Air conditioner switch: OFF
No loadApprox. 2,600 - 3,500 mV Monitor Item Condition Values/Status

ECM
EC-361
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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N
P O*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to PG-3, "
How to Handle Battery".
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
 ECM is located in the engine room left side near battery. For this inspection, remove passenger side instru-
ment lower panel.
 Specification data are reference values.
 Pulse signal is measured by CONSULT-III.
ALT DUTY SIG Power generation voltage variable control: Operating ON
 Power generation voltage variable control: Not operating OFF Monitor Item Condition Values/Status
PBIA9221J
Terminal No. Description
ConditionVa l u e
(Approx.)
+-– Signal nameInput/
Output
1
(P/B)
11 2
(B)Fuel injector No. 6
Output[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idleBATTERY VOLTAGE
(11 - 14 V)
3
(L/W)Fuel injector No. 5
29
(LG/R)Fuel injector No. 4
30
(R/Y)Fuel injector No. 3
[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14 V)
31
(R/W)Fuel injector No. 2
32
(R/B)Fuel injector No. 1
2
(G/W)11 2
(B)Throttle control motor relay
power supplyInput [Ignition switch: ON]BATTERY VOLTAGE
(11 - 14 V)
4
(BR/Y)11 2
(B)A/F sensor 1 heater
(Bank 1)Output[Engine is running]
 Warm-up condition
 Idle speed
(More than 140 seconds after
starting engine)2.9 - 8.8 V
JMBIA0047GB
JMBIA0048GB
JMBIA0902GB

EC-362
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
5
(L)11 2
(B)Throttle control motor (Open) Output[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully de-
pressed0 - 14 V
[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully re-
leased0 - 14 V
6
(P)11 2
(B)Throttle control motor (Close) Output[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully re-
leased0 - 14 V
8
(SB)11 2
(B)A/F sensor 1 heater (Bank 2) Output[Engine is running]
 Warm-up condition
 Idle speed
(More than 140 seconds after
starting engine)2.9 - 8.8 V
9
(L/B)
11 2
(B)Ignition signal No. 3
Output[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle0 - 0.2 V
10
(G/R)Ignition signal No. 2
11
(Y/R)Ignition signal No. 1
18
(GR/R)Ignition signal No. 6
[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpm0.1 - 0.4 V
19
(P)Ignition signal No. 5
21
(W)Ignition signal No. 4
12
(B)— ECM ground — — — Terminal No. Description
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
OutputJMBIA0031GB
JMBIA0032GB
JMBIA1125GB
JMBIA0030GB
JMBIA0035GB
JMBIA0036GB

ECM
EC-363
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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13
(P/B)11 2
(B)Heated oxygen sensor 2 heat-
er (Bank 1)Output[Engine is running]
 Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load10 V
[Ignition switch: ON]
 Engine stopped
[Engine is running]
 Engine speed: Above 3,600
rpmBATTERY VOLTAGE
(11 - 14 V)
14
(GR)11 2
(B)Fuel pump relay Output[Ignition switch: ON]
 For 1 second after turning ig-
nition switch ON
[Engine is running]0 - 1.5 V
[Ignition switch: ON]
 More than 1 second after turn-
ing ignition switch ONBATTERY VOLTAGE
(11 - 14 V)
15
(O)11 2
(B)Throttle control motor relay Output[Ignition switch: ON → OFF]0 - 1.0 V → BATTERY VOLTAGE
(11 - 14 V) → 0 V
[Ignition switch: ON] 0 - 1.0 V
16
(B/Y)— ECM ground — — —
17
(R)11 2
(B)Heated oxygen sensor 2 heat-
er (Bank 2)Output[Engine is running]
 Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load10 V
[Ignition switch: ON]
 Engine stopped
[Engine is running]
 Engine speed: Above 3,600
rpmBATTERY VOLTAGE
(11 - 14 V)
24
(W/B)11 2
(B)ECM relay
(Self shut-off)Output[Engine is running]
[Ignition switch: OFF]
 A few seconds after turning
ignition switch OFF0 - 1.5 V
[Ignition switch: OFF]
 More than a few seconds after
turning ignition switch OFFBATTERY VOLTAGE
(11 - 14 V) Terminal No. Description
ConditionVa l u e
(Approx.)
+-– Signal nameInput/
Output
JMBIA0902GB
JMBIA0902GB

EC-364
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
25
(P/L)11 2
(B)EVAP canister purge volume
control solenoid valveOutput[Engine is running]
 Idle speed
 Accelerator pedal: Not de-
pressed even slightly, after
engine startingBATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
 Engine speed: About 2,000
rpm (More than 100 seconds
after starting engine)BATTERY VOLTAGE
(11 - 14 V)
26
(GR/B)11 2
(B)VIAS control solenoid valve 2 Output[Engine is running]
 Warm-up condition
 Idle speedBATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
 Warm-up condition
 When revving engine up to
5,000 rpm quicklyBATTERY VOLTAGE (11 - 14 V)
↓
0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
27
(V)11 2
(B)VIAS control solenoid valve 1 Output[Engine is running]
 Warm-up condition
 Idle speedBATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
 Warm-up condition
 When revving engine up to
5,000 rpm quicklyBATTERY VOLTAGE (11 - 14 V)
↓
0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
28
(BR/W)11 2
(B)Electronic controlled engine
mount control solenoid valveOutput[Engine is running]
 Idle speed0 - 1.0 V
[Engine is running]
 Engine speed: More than 950
rpmBATTERY VOLTAGE
(11 - 14 V)
33
(W)35
(B)Heated oxygen sensor 2
(Bank 1)Input[Engine is running]
 Revving engine from idle to
3,000 rpm quickly after the fol-
lowing conditions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load0 - 1.0 V
34
(W/L)35
(B)Heated oxygen sensor 2
(Bank 2)Input[Engine is running]
 Revving engine from idle to
3,000 rpm quickly after the fol-
lowing conditions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load0 - 1.0 V Terminal No. Description
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
Output
JMBIA0039GB
JMBIA0040GB

ECM
EC-365
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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P O35
(B)—Sensor ground
(Heated oxygen sensor 2)—— —
36
(B)—Sensor ground
(Throttle position sensor)—— —
37
(W)36
(B)Throttle position sensor 1 Input[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully re-
leasedMore than 0.36 V
[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully de-
pressedLess than 4.75 V
38
(R)36
(B)Throttle position sensor 2 Input[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully re-
leasedLess than 4.75 V
[Ignition switch: ON]
 Engine stopped
 Selector lever: D
 Accelerator pedal: Fully de-
pressedMore than 0.36 V
39
(R)40
(G)Refrigerant pressure sensor Input[Engine is running]
 Warm-up condition
 Both A/C switch and blower
fan motor switch: ON (Com-
pressor operates)1.0 - 4.0 V
40
(G)—Sensor ground
(Refrigerant pressure sensor)—— —
41
(O/B)48
(B/P)Power steering pressure sen-
sorInput[Engine is running]
 Steering wheel: Being turned0.5 - 4.5 V
[Engine is running]
 Steering wheel: Not being
turned0.4 - 0.8 V
42
(BR)44
(G/B)Battery current sensor Input[Engine is running]
 Battery: Fully charged*
2
 Idle speed2.6 - 3.5 V
44
(G/B)—Sensor ground
(Battery current sensor)—— —
45
(P)49
(L)A/F sensor 1 (Bank 1) Input [Ignition switch: ON] 2.2 V
46
(Y)52
(B/R)Engine coolant temperature
sensorInput [Engine is running]0 - 4.8 V
Output voltage varies with engine
coolant temperature.
47
(G)36
(B)Sensor power supply
(Throttle position sensor)— [Ignition switch: ON] 5 V
48
(B/P)—Sensor ground
(Power steering pressure
sensor)—— —
49
(L)11 2
(B)A/F sensor 1 (Bank 1) Input[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpm1.8 V
Output voltage varies with air fuel
ratio. Terminal No. Description
ConditionVa l u e
(Approx.)
+-– Signal nameInput/
Output