2003 NISSAN TEANA sensor

EC-690
[VQ]
FUEL PUMP

FUEL PUMPPFP:17042
DescriptionBBS0056P
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for 1 second after the ignition switch is turned ON to improve engine start-
ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows that
the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when the
ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeBBS0056Q
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump control Fuel pump relay
Battery Battery voltage*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveSto ps.
PBIB2259E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY

For 1 second after turning ignition switch ON

Engine running or crankingON

Except above conditions OFF

EC-694
[VQ]
FUEL PUMP

7. CHECK CONDENSER POWER SUPPLY CIRCUIT-II
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and condenser terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E11, E253

Harness connectors B202, E104

Harness for open or short between IPDM E/R and condenser
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK CONDENSER GROUND CIRCUIT
1. Check harness continuity between condenser terminal 2 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10. CHECK CONDENSER
Refer to EC-695, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace condenser.
11 . CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect harness connectors E104, B202
3. Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
4. Check harness continuity between “fuel level sensor unit and
fuel pump” terminal 1 and harness connector B202 terminal 1,
“fuel level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.Continuity should exist.
Continuity should exist.
Continuity should exist.PBIB2121E

FUEL PUMP
EC-695
[VQ]
C
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EC

12. CHECK FUEL PUMP
Refer to EC-695, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace fuel pump.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness or connectors.
Component InspectionBBS0056T
FUEL PUMP
1. Disconnect fuel level sensor unit and fuel pump harness connector.
2. Check resistance between fuel level sensor unit and fuel pump
terminals 1 and 3.
CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals 1 and 2.
Removal and InstallationBBS0056U
FUEL PUMP
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" . Resistance: 0.2 - 5.0Ω [at 25°C (77°F)]
SEC918C
Resistance: Above 1 MΩ [at 25°C (77°F)]
PBIB0794E

EC-696
[VQ]
HO2S1

HO2S1PFP:22690
Component DescriptionBBS0055O
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1 to 0V.
CONSULT-II Reference Value in Data Monitor ModeBBS0055P
Specification data are reference values.
SEF463R
SEF288D
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)

Engine: After warming upMaintaining engine speed at 2,000
rpm0 - 0.3V ←→ Approx. 0.6 -
1.0V
HO2S1 MNTR (B1)
HO2S1 MNTR (B2)LEAN ←→ RICH
Changes more than 5 times
during 10 seconds.

EC-698
[VQ]
HO2S1

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
2OHeated oxygen sensor 1
heater (Bank 1)[Engine is running]

Warm-up condition

Engine speed: Below 3,600 rpmApproximately 5V
[Engine is running]

Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
35 WHeated oxygen sensor 1
(Bank 1)[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 BSensor ground
(Heated oxygen sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
PBIB0519E

EC-700
[VQ]
HO2S1

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureBBS0055R
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
2. CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “HO2S1 MNTR (B1)” and “HO2S1 MNTR (B2)” in “DATA
MONITOR” mode with CONSULT-II.
3. Keep the engine speed at 2,000 rpm under no load, and make
sure that the monitors fluctuate between LEAN and RICH more
than 5 times in 10 seconds.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
24 R/LHeated oxygen sensor 1
heater (Bank 2)[Engine is running]

Warm-up condition

Engine speed: Below 3,600 rpmApproximately 8V
[Engine is running]

Warm-up condition

Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
16 WHeated oxygen sensor 1
(Bank 2)[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 BSensor ground
(Heated oxygen sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
PBIB0519E
1 time: RICH → LEAN → RICH
2 time: RICH → LEAN → RICH → LEAN → RICH
PBIB0120E

HO2S1
EC-701
[VQ]
C
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EC

3. CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Set ECM in “DIAGNOSTIC TEST MODE II — HEATED OXYGEN SENSOR 1 MONITOR”.
Refer to EC-378, "
How to Set Diagnostic Test Mode II (Heated Oxygen Sensor 1 Monitor)" .
4. Keep the engine speed at 2,000 rpm under no load, and make
sure that the MI comes ON more than 5 times in 10 seconds.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-457, "
Ground Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace ground connections.
5. RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
>> GO TO 6.
SAT652J
PBIB2160E
Tightening torque: 50 N·m (5.1 kg-m, 37 ft-lb)
PBIB2144E

EC-702
[VQ]
HO2S1

6. CHECK FOR EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace.
7. CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
8. CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between ECM terminal 78 and HO2S1 terminal 4.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
SEC502D
Continuity should exist.
PBIB2468E