cooling NISSAN TEANA 2008 Workshop Manual

COOLING FAN
EC-325
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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2.DETECT MALFUNCTIONING PART
Check the following.
 40A fusible link (letter K)
 10A fuse (No.42)
 IPDM E/R harness connector E10
 Harness for open or short between cooling fan relay-2 and battery
 Harness for open or short between cooling fan relay-3 and battery
 Harness for open or short between cooling fan relay-2 and IPDM E/R
 Harness for open or short between cooling fan relay-3 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors.
3. Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1. Disconnect cooling fan motor-1 harness connector.
2. Check the voltage between cooling fan motor-1 harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 40A fusible link (letter M)
 Harness for open or short between cooling fan motor-1 and battery
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN MOTOR CIRCUIT-I
1. Disconnect cooling fan motor-2 harness connector.
2. Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.
Cooling fan relay IPDM E/R
Continuity
Connector Terminal Connector Terminal
E57
(cooling fan relay-2)1E1142
Existed
E59
(cooling fan relay-3)1E1034
Cooling fan motor-1
Ground Voltage
Connector Terminal
E3011
Ground Battery voltage
2

EC-326
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 Harness for open or short between cooling fan motor-1 and cooling fan relay-2
 Harness for open or short between cooling fan motor-1 and cooling fan relay-3
 Harness for open or short between cooling fan motor-2 and cooling fan relay-2
 Harness for open or short between cooling fan motor-2 and cooling fan relay-3
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN MOTOR CIRCUIT-II
1. Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 Harness for open or short between cooling fan motor-1 and IPDM E/R
 Harness for open or short between cooling fan motor-2 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK COOLING FAN MOTOR CIRCUIT-III
1. Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
Cooling fan relay Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E57
(cooling fan relay-2)3E302
(Cooling fan motor-2)2
Existed 7E301
(Cooling fan motor-1)3
E59
(cooling fan relay-3)3E302
(Cooling fan motor-2)1
7E301
(Cooling fan motor-1)4
IPDM E/R Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E1035E301
(Cooling fan motor-1)4
Existed
38E302
(Cooling fan motor-2)1

COOLING FAN
EC-327
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
11 .CHECK COOLING FAN MOTOR CIRCUIT-IV
1. Check the continuity between cooling fan motor-2 harness connector and ground.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK COOLING FAN RELAYS-2 AND -3
Refer to EC-328, "
Component Inspection (Cooling Fan Relay)".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Replace malfunctioning cooling fan relay.
13.CHECK COOLING FAN MOTORS-1 AND -2
Refer to EC-327, "
Component Inspection (Cooling Fan Motor)".
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace malfunctioning cooling fan motor.
14.CHECK INTERMITTENT INCIDENT
Perform GI-35, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness connectors.
Component Inspection (Cooling Fan Motor)INFOID:0000000003856830
1.CHECK COOLING FAN MOTOR
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor harness connector.
3. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor
Ground Continuity
Connector Terminal
E57
(cooling fan relay-2)6
Ground Existed
E59
(cooling fan relay-3)6
Cooling fan motor-2
Ground Continuity
Connector Terminal
E3023
Ground Existed
4

EC-328
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay)INFOID:0000000003856831
1.CHECK COOLING FAN RELAY
1. Disconnect cooling fan relays -2, -3 harness connectors.
2. Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan relay.
ConditionTe r m i n a l s
(+) (−)
Cooling fan motorA1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
B 1, 2 3, 4
Terminals Conditions Continuity
3 and 5
6 and 712 V direct current supply between terminals 1 and 2 Existed
No current supply Not existed
SEF745U

EC-348
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
DescriptionINFOID:0000000003856862
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function CheckINFOID:0000000003856863
1.CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-348, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856864
1.CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
PBIB2657E
ECM
Voltage (V)
Connector+–
Te r m i n a l Te r m i n a l
F839
(Refrigerant pressure sensor signal)40
(Sensor ground)1.0 - 4.0
Refrigerant pressure sensor
Ground Voltage (V)
Connector Terminal
E300 1 Ground Approx. 5

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

ECM
EC-387
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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DTC RELATED ITEM
Engine operating condi-
tion in fail-safe modeDetected items RemarksReference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cutMalfunction indicator
circuitWhen there is an open circuit on MI circuit, the ECM cannot warn the
driver by illuminating MI when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MI circuit is open by
means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MI
circuit are detected and demands the driver to repair the malfunction.EC-346
DTC No. Detected items Engine operating condition in fail-safe mode
P0011
P0021Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START40°C (104°F)
Approx. 4 minutes or more after
engine starting80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0500 Vehicle speed sensor The cooling fan operates (Highest) while engine is running.
P0605 ECM (When ECM calculation function is a malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1805 Brake switch ECM controls the electric throttle control actuator by regulating the throttle opening to a
small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
P2100
P2103Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control
functionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

ENGINE CONTROL SYSTEM SYMPTOMS
EC-403
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1 - 6: The numbers refer to the order of inspection.Va l v e
mecha-
nismTiming chain
55555 55 5EM-65
CamshaftEM-84
Intake valve timing controlEM-65
Intake valve
3EM-97
Exhaust valve
Exhaust Exhaust manifold/Tube/Muffler/
Gasket
55555 55 5EM-34
, EX-
4Three way catalyst
Lubrica-
tionOil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler
55555 55 5LU-7
, LU-
10, LU-11,
LU-13
Oil level (Low)/Filthy oilLU-7
Cooling
Radiator/Hose/Radiator filler cap
55555 55 45CO-12,
CO-12
Thermostat 5CO-23
Water pumpCO-18
Water galleryCO-2
Cooling fan
5CO-16
Coolant level (Low)/Contaminat-
ed coolantCO-8
NVIS (NISSAN Vehicle Immobilizer System —
NATS)11SEC-14
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA

EM-34
< ON-VEHICLE REPAIR >
EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded ViewINFOID:0000000003802258
Removal and InstallationINFOID:0000000003802259
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.
1. Remove following parts:
 Air duct (inlet), air cleaner case (upper) with mass air flow sensor and air duct assembly: Refer to EM-
26, "Exploded View".
 Engine cover: Refer to EM-24, "
Exploded View".
 Front wiper arm: Refer to WW-105, "
Exploded View".
 Extension cowl top: Refer to EXT-20, "
Exploded View".
2. Remove exhaust front tube. Refer to EX-5, "
Exploded View".
1. Gasket 2. Exhaust manifold (bank 1) 3. Exhaust manifold cover (bank 1)
4. Air fuel ratio sensor 1 (bank 1) 5. Ring gasket 6. Three way catalyst (bank 1)
7. Three way catalyst support (bank 1) 8. Heated oxygen sensor 2 (bank 1) 9. Air fuel ratio sensor 1 (bank 2)
10. Exhaust manifold cover (bank 2) 11. Exhaust manifold (bank 2) 12. Ring gasket
13. Three way catalyst (bank 2) 14. Three way catalyst support (bank 2) 15. Heated oxygen sensor 2 (bank 2)
A. To oil pan (upper) B. Upper mark
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA2235GB

EM-66
< ON-VEHICLE REPAIR >
TIMING CHAIN
 Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate an unusualness. Noise
will stop after hydraulic pressure rises.
 Warm up engine thoroughly to check there is no leakage of fuel, or any oil/fluids including engine oil and
engine coolant.
 Bleed air from lines and hoses of applicable lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage