2008 NISSAN TEANA ESP

EC-324
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
COOLING FAN
DescriptionINFOID:0000000003856827
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to EC-60, "
System Diagram".
Component Function CheckINFOID:0000000003856828
1.CHECK COOLING FAN FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percent.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-11, "
Diagnosis
Description".
2. Check that cooling fan operates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-324, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856829
1.CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2, -3.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
Cooling fan speedCooling fan motor terminals
(+) (−)
Middle (MID)1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
High (HI) 1 and 2 3 and 4
Cooling fan relay
Ground Voltage
Connector Terminal
E57
(cooling fan relay-2)2
Ground Battery voltage 5
E59
(cooling fan relay-3)2
5

EC-392
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by ISO 15031-6.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: The troubleshooting for this DTC needs CONSULT-III.
*5: When the fail-safe operations for both self-diagnoses occur, the MI illuminates.
*6: When the ECM is in the mode that displays SRT status, MI may flash. For the details, refer to “How to Display SRT Status”.
How to Set SRT CodeINFOID:0000000003856873
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
WITH CONSULT-III
Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table
on “SRT Item”.
WITHOUT CONSULT-III
The most efficient driving pattern in which SRT codes can be properly set is explained below. The driving pat-
tern should be performed one or more times to set all SRT codes.
STEP MOTR FNC P1778 1778 — 2×TM-100
VIAS S/V-1 P1800 1800 — 2 —EC-285
VIAS S/V-2 P1801 1801 — 2 —EC-288
BRAKE SW/CIRCUIT P1805 1805 — 2 —EC-291
ETC MOT PWR-B1 P2100 2100 — 1×EC-294
ETC FNCTN/CIRC-B1 P2101 2101 — 1×EC-296
ETC MOT PWR P2103 2103 — 1×EC-294
ETC MOT-B1 P2118 2118 — 1×EC-300
ETC ACTR-B1 P2119 2119 — 1×EC-302
APP SEN 1/CIRC P2122 2122 — 1×EC-304
APP SEN 1/CIRC P2123 2123 — 1×EC-304
APP SEN 2/CIRC P2127 2127 — 1×EC-307
APP SEN 2/CIRC P2128 2128 — 1×EC-307
TP SENSOR-B1 P2135 2135 — 1×EC-311
APP SENSOR P2138 2138 — 1×EC-314
A/F SENSOR1 (B1) P2A00 2A00 — 2×EC-318
A/F SENSOR1 (B2) P2A03 2A03 — 2×EC-318
Items
(CONSULT-III screen terms)DTC*
1
SRT code Trip MIReference
page CONSULT-III
GST*
2ECM*3

ECM
EC-395
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
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ItemOBD-
MIDSelf-diagnostic test item DTCTest value and
Te s t l i m i t
(GST display)
Description
TIDUnit and
Scaling
ID
HO2S01HAir fuel ratio (A/F) sensor 1
(Bank 1)P0131 83H 0BHMinimum sensor output voltage for test
cycle
P0131 84H 0BHMaximum sensor output voltage for test
cycle
P0130 85H 0BHMinimum sensor output voltage for test
cycle
P0130 86H 0BHMaximum sensor output voltage for test
cycle
P0133 87H 04HResponse rate: Response ratio (Lean to
Rich)
P0133 88H 04HResponse rate: Response ratio (Rich to
Lean)
P2A00 89H 84H The amount of shift in air fuel ratio
P2A00 8AH 84H The amount of shift in air fuel ratio
P0130 8BH 0BH Difference in sensor output voltage
P0133 8CH 83H Response gain at the limited frequency
02HHeated oxygen sensor 2
(Bank 1)P0138 07H 0CHMinimum sensor output voltage for test
cycle
P0137 08H 0CHMaximum sensor output voltage for test
cycle
P0138 80H 0CH Sensor output voltage
P0139 81H 0CH Difference in sensor output voltage
03HHeated oxygen sensor 3
(Bank 1)P0143 07H 0CHMinimum sensor output voltage for test
cycle
P0144 08H 0CHMaximum sensor output voltage for test
cycle
P0146 80H 0CH Sensor output voltage
P0145 81H 0CH Difference in sensor output voltage

EC-396
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
HO2S05HAir fuel ratio (A/F) sensor 1
(Bank 2)P0151 83H 0BHMinimum sensor output voltage for test
cycle
P0151 84H 0BHMaximum sensor output voltage for test
cycle
P0150 85H 0BHMinimum sensor output voltage for test
cycle
P0150 86H 0BHMaximum sensor output voltage for test
cycle
P0153 87H 04HResponse rate: Response ratio (Lean to
Rich)
P0153 88H 04HResponse rate: Response ratio (Rich to
Lean)
P2A03 89H 84H The amount of shift in air fuel ratio
P2A03 8AH 84H The amount of shift in air fuel ratio
P0150 8BH 0BH Difference in sensor output voltage
P0153 8CH 83H Response gain at the limited frequency
06HHeated oxygen sensor 2
(Bank 2)P0158 07H 0CHMinimum sensor output voltage for test
cycle
P0157 08H 0CHMaximum sensor output voltage for test
cycle
P0158 80H 0CH Sensor output voltage
P0159 81H 0CH Difference in sensor output voltage
07HHeated oxygen sensor 3
(Bank2)P0163 07H 0CHMinimum sensor output voltage for test
cycle
P0164 08H 0CHMaximum sensor output voltage for test
cycle
P0166 80H 0CH Sensor output voltage
P0165 81H 0CH Difference in sensor output voltage
CATA-
LYST21HThree way catalyst function
(Bank1)P0420 80H 01H O2 storage index
P0420 82H 01HSwitching time lag engine exhaust index
value
P2423 83H 0CHDifference in 3rd O2 sensor output volt-
age
P2423 84H 84H O2 storage index in HC trap catalyst
22HThree way catalyst function
(Bank2)P0430 80H 01H O2 storage index
P0430 82H 01HSwitching time lag engine exhaust index
value
P2424 83H 0CHDifference in 3rd O2 sensor output volt-
age
P2424 84H 84H O2 storage index in HC trap catalyst ItemOBD-
MIDSelf-diagnostic test item DTCTest value and
Te s t l i m i t
(GST display)
Description
TIDUnit and
Scaling
ID

EC-398
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
FUEL
SYSTEM81HFuel injection system function
(Bank 1)P0171 or P0172 80H 2FH Long-term fuel trim
P0171 or P0172 81H 24H The number of lambda control clamped
82HFuel injection system function
(Bank 2)P0174 or P0175 80H 2FH Long-term fuel trim
P0174 or P0175 81H 24H The number of lambda control clamped
MISFIRE A1H Multiple Cylinder MisfiresP0301 80H 24HMisfiring counter at 1000 revolution of
the first cylinder
P0302 81H 24HMisfiring counter at 1000 revolution of
the second cylinder
P0303 82H 24HMisfiring counter at 1000 revolution of
the third cylinder
P0304 83H 24HMisfiring counter at 1000 revolution of
the fourth cylinder
P0305 84H 24HMisfiring counter at 1000 revolution of
the fifth cylinder
P0306 85H 24HMisfiring counter at 1000 revolution of
the sixth cylinder
P0307 86H 24HMisfiring counter at 1000 revolution of
the seventh cylinder
P0308 87H 24HMisfiring counter at 1000 revolution of
the eighth cylinder
P0300 88H 24HMisfiring counter at 1000 revolution of
the multiple cylinders
P0301 89H 24HMisfiring counter at 200 revolution of the
first cylinder
P0302 8AH 24HMisfiring counter at 200 revolution of the
second cylinder
P0303 8BH 24HMisfiring counter at 200 revolution of the
third cylinder
P0304 8CH 24HMisfiring counter at 200 revolution of the
fourth cylinder
P0305 8DH 24HMisfiring counter at 200 revolution of the
fifth cylinder
P0306 8EH 24HMisfiring counter at 200 revolution of the
fifth cylinder
P0307 8FH 24HMisfiring counter at 200 revolution of the
fifth cylinder
P0308 90H 24HMisfiring counter at 200 revolution of the
fifth cylinder
P0300 91H 24HMisfiring counter at 1000 revolution of
the single cylinder
P0300 92H 24HMisfiring counter at 200 revolution of the
single cylinder
P0300 93H 24HMisfiring counter at 200 revolution of the
multiple cylinders ItemOBD-
MIDSelf-diagnostic test item DTCTest value and
Te s t l i m i t
(GST display)
Description
TIDUnit and
Scaling
ID

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

EM-22
< ON-VEHICLE MAINTENANCE >
COMPRESSION PRESSURE
COMPRESSION PRESSURE
InspectionINFOID:0000000003802245
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-411, "
Inspection".
3. Disconnect fuel pump fuse to avoid fuel injection during measurement. Refer to EC-20,
"ComponentPartsLocation".
4. Remove engine cover. Refer to EM-24, "
Exploded View".
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-49, "
Exploded View".
6. Connect engine tachometer (not required in use of CONSULT-III).
7. Install compression gauge with an adapter (commercial service
tool) onto spark plug hole.
 Use the adapter whose picking up end inserted to spark plug
hole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.
8. With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and the engine rpm. Perform these steps to check each
cylinder.
CAUTION:
Always use a fully charged battery to obtain the specified engine speed.
 If the engine speed is out of the specified range, check battery liquid for proper gravity. Check the
engine speed again with normal battery gravity.
 If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
 If some cylinder has low compression pressure, pour small amount of engine oil into the spark plug hole
of the cylinder to recheck it for compression.
- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-
ton rings and replace if necessary.
- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
 If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
9. After inspection is completed, install removed parts.
PBIC0900E
a: φ20 mm (0.79 in)
JPBIA0171ZZ
Compression pressure : Refer to EM-135, "GeneralSpecification".

FUEL INJECTOR AND FUEL TUBE
EM-45
< ON-VEHICLE REPAIR >
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5. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-8, "
Draining" or EM-28, "Exploded View".
CAUTION:
Perform this step when the engine is cold.
6. Remove intake manifold collector. Refer to EM-28, "
Exploded View".
7. When separating fuel feed hose and fuel tube connection, disconnect quick connector as follows:
a. Remove quick connector cap from quick connector.
b. Disconnect quick connector from fuel tube as follows:
CAUTION:
Disconnect quick connector by using the quick connector release [SST: — (J-45488)], not by pick-
ing out retainer tabs.
i. With the sleeve side of quick connector release facing to quick connector, install the quick connector
release onto fuel tube.
ii. Insert the quick connector release (A) into quick connector (2)
until sleeve (B) contacts and goes no further. Hold quick connec-
tor release on that position.
CAUTION:
Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.
iii. Draw and pull out quick connector straight from fuel tube (1).
CAUTION:
 Pull quick connector (E) holding position (D) as shown in
the figure.
 Never pull with lateral force applied. O-ring inside quick connector may be damaged.
 Prepare container and cloth beforehand as fuel will leak out.
 Avoid fire and sparks.
 Keep parts away from heat source. Especially, be careful when welding is performed around
them.
 Never expose parts to battery electrolyte or other acids.
 Never bend or twist connection between quick connector and fuel feed hose (with damper) dur-
ing installation/removal.
 To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags, etc. (A) or something similar.
8. Disconnect harness connector from fuel injector.
C : Insert and retain
JPBIA0033ZZ
JPBIA0035ZZ