2008 NISSAN TEANA sensor

ENGINE CONTROL SYSTEM SYMPTOMS
EC-401
< SYMPTOM DIAGNOSIS >[VQ25DE, VQ35DE]
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1 - 6: The numbers refer to the order of inspection.
(continued on the next figure)
SYSTEM — ENGINE MECHANICAL & OTHER
Crankshaft position sensor (POS) circuit 2 2EC-218
Camshaft position sensor (PHASE) circuit 3 2EC-222
Vehicle speed signal circuit 2 3 3 3EC-234
Power steering pressure sensor circuit 2 3 3EC-236
ECM 22333333333EC-238,
EC-240
Intake valve timing control solenoid valve cir-
cuit32 13223 3EC-146
PNP signal circuit 3 3 3 3 3EC-245
VIAS control solenoid valve 1 circuit 1EC-285
VIAS control solenoid valve 2 circuit 1EC-288
Refrigerant pressure sensor circuit 2 3 3 4EC-348
Electrical load signal circuit 3EC-329
Air conditioner circuit 223333333 3 2HAC-159
ABS actuator and electric unit (control unit) 4BRC-80
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

EC-402
< SYMPTOM DIAGNOSIS >[VQ25DE, VQ35DE]
ENGINE CONTROL SYSTEM SYMPTOMS
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
Fuel Fuel tank
5
5FL-9
Fuel piping 5 5 5 5 5 5FL-4
Va p o r l o c k—
Valve deposit
5 555 55 5—
Poor fuel (Heavy weight gasoline,
Low octane)—
Air Air duct
55555 5EM-26
Air cleanerEM-26
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)
5555EM-26
Electric throttle control actuatorEM-29
Air leakage from intake manifold/
Collector/GasketEM-29,
EM-32
Cranking Battery
111111
11PG-109
Generator circuitCHG-20
Starter circuit 3STR-5,
STR-6
Signal plate 6EM-104
PNP signal 4TM-48,
TM-214
Engine Cylinder head
55555 55 5EM-97
Cylinder head gasket 4 3
Cylinder block
66666 66 64
EM-110
Piston
Piston ring
Connecting rod
Bearing
Crankshaft

EC-406
< PRECAUTION >[VQ25DE, VQ35DE]
PRECAUTIONS
CAUTION:
 Always turn the ignition switch OFF and disconnect the negative battery cable before any repair or
inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause
the MI to illuminate.
 Always connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to illuminate due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
 Certain systems and components, especially those related to OBD, may use a new style slide-lock-
ing type harness connector. For description and how to disconnect, refer to PG-96, "
Description".
 Always to route and secure the harnesses properly after work. The interference of the harness with a
bracket, etc. may cause the MI to illuminate due to the short circuit.
 Always connect rubber tubes properly after work. A misconnected or disconnected rubber tube may
cause the MI to illuminate due to the malfunction of the EVAP system or fuel injection system, etc.
 Always erase the unnecessary malfunction information (repairs completed) from the ECM and TCM
(Transmission control module) before returning the vehicle to the customer.
General PrecautionsINFOID:0000000003856881
Always use a 12 volt battery as power source.
Never attempt to disconnect battery cables while engine is
running.
Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is
turned OFF.
Before removing parts, turn ignition switch OFF and then dis-
connect battery ground cable.
Never disassemble ECM.
If a battery cable is disconnected, the memory will return to the ECM value.
The ECM will now start to self-control at its initial value. Thus, engine operation can vary slightly in
this case. However, this is not an indication of a malfunction. Never replace parts because of a slight
variation.
If the battery is disconnected, the following emission-related diagnostic information will be lost
within 24 hours.
-Diagnostic trouble codes
-1st trip diagnostic trouble codes
-Freeze frame data
-1st trip freeze frame data
-System readiness test (SRT) codes
-Test values
When connecting ECM harness connector, fasten (B) it
securely with a lever (1) as far as it will go as shown in the fig-
ure.
SEF289H
2: ECM
A : Loosen
PBIB2947E

PRECAUTIONS
EC-407
< PRECAUTION >[VQ25DE, VQ35DE]
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When connecting or disconnecting pin connectors into or
from ECM, never damage pin terminals (bends or break).
Check that there are not any bends or breaks on ECM pin ter-
minal, when connecting pin connectors.
Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.
Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
of ICs, etc.
Keep engine control system parts and harness dry.
Before replacing ECM, perform ECM Terminals and Reference
Value inspection and check ECM functions properly. Refer to
EC-357, "
Reference Value".
Handle mass air flow sensor carefully to avoid damage.
Never clean mass air flow sensor with any type of detergent.
Never disassemble electric throttle control actuator.
Even a slight leak in the air intake system can cause serious
incidents.
Never shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
After performing each TROUBLE DIAGNOSIS, perform DTC
Confirmation Procedure or Component Function Check.
The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Component Func-
tion Check should be a good result if the repair is completed.
PBIB0090E
MEF040D
SAT652J

EC-410
< PREPARATION >[VQ25DE, VQ35DE]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000003943273
Commercial Service ToolsINFOID:0000000003943274
Tool name Description
Fuel tube adapter Measuring fuel pressure
PBIB3043E
Tool name Description
Quick connector re-
leaseRemoves fuel tube quick connectors in engine
room
Socket wrench Removes and installing engine coolant tempera-
ture sensor
Oxygen sensor thread
cleanerReconditions the exhaust system threads before
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for Zirco-
nia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Tita-
nia Oxygen Sensor
Anti-seize lubricant
i.e.: (Permatex
TM
133AR or equivalent
meeting MIL specifica-
tion MIL-A-907)Lubricates oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
PBIC0198E
S-NT705
AEM488
S-NT779

EC-414
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ25DE, VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Idle SpeedINFOID:0000000003856889
Ignition TimingINFOID:0000000003856890
Calculated Load ValueINFOID:0000000003856891
Mass Air Flow SensorINFOID:0000000003856892
*: Engine is warmed up to normal operating temperature and running under no load.Condition Specification
No load (in P or N position) 600 ± 50 rpm
Condition Specification
No load (in P or N position) 12 ± 5° BTDC
Condition Specification (Using CONSULT-III or GST)
At idle10 – 35 %
At 2,500 rpm10 – 35 %
Supply voltageBattery voltage (11 – 14 V)
Output voltage at idle (in N position) 0.9 – 1.2 V*
Mass air flow (Using CONSULT-III or GST)2.0 – 6.0 g·m/sec at idle*
7.0 – 20.0 g·m/sec at 2,500 rpm*

PREPARATION
EM-9
< PREPARATION >
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Commercial Service ToolINFOID:0000000003802235
KV10112100
(BT8653-A)
Angle wrenchTightening bolts for connecting rod bearing
cap, cylinder head, etc. in angle
KV10117100
(J3647-A)
Heated oxygen sensor wrenchLoosening or tightening air fuel ratio sensor 1
For 22 mm (0.87 in) width hexagon nut
KV10114400
(J38365)
Heated oxygen sensor wrenchLoosening or tightening heated oxygen sen-
sor 2
a: 22 mm (0.87 in)
—
(J-45488)
Quick connector releaseRemoving fuel tube quick connectors in en-
gine room
(Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210) Tool number
(SPX North America No.)
Tool nameDescription
NT014
NT379
NT636
PBIC0198E
(SPX North America No.)
Tool nameDescription
(—)
Power toolLoosening bolts and nuts
(—)
Tube presserPressing the tube of liquid gasket
PBIC0190E
NT052

PREPARATION
EM-11
< PREPARATION >
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(—)
Valve guide driftRemoving and installing valve guide
Intake and Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.
(—)
Valve guide reamer(1): Reaming valve guide inner hole
(2): Reaming hole for oversize valve guide
Intake and Exhaust:
d
1: 6.0 mm (0.236 in) dia.
d
2: 10.2 mm (0.402 in) dia.
a: (J-43897-18)
b: (J-43897-12)
Oxygen sensor thread cleanerReconditioning the exhaust system threads
before installing a new air fuel ratio sensor and
heated oxygen sensor (Use with anti-seize lu-
bricant shown below.)
a: J-43897-18 [18 mm (0.71 in) dia.] for zir-
conia heated oxygen sensor and air fuel
ratio sensor
b: J-43897-12 [12 mm (0.47 in) dia.] for tita-
nia heated oxygen sensor
(—)
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)Lubricating air fuel ratio sensor and oxygen
sensor threads cleaning tool when recondi-
tioning exhaust system threads (SPX North America No.)
Tool nameDescription
NT015
NT016
AEM488
AEM489