NISSAN TEANA 2008 Service Manual

EC-380
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
JCBWM0569GB

ECM
EC-381
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
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K
L
MA
EC
N
P O
JCBWM0570GB

EC-382
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
JCBWM0571GB

ECM
EC-383
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
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K
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MA
EC
N
P O
JCBWM0572GB

EC-384
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
JCBWM0573GB

ECM
EC-385
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
JCBWM0574GB

EC-386
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
Fail safe
INFOID:0000000003856870
NON DTC RELATED ITEM
JCBWM0575GB

ECM
EC-387
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
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G
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MA
EC
N
P O
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.

EC-388
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
ECM
DTC Inspection Priority Chart
INFOID:0000000003856871
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
P2119 Electric throttle control ac-
tuator(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator because of regulating the throttle open-
ing to 20 degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driver, it slows down gradually by fuel cut. After the vehicle
stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.
P2122
P2123
P2127
P2128
P2138Accelerator pedal position
sensorThe 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. DTC No. Detected items Engine operating condition in fail-safe mode
Priority Detected items (DTC)
1  U1000 U1001 CAN communication line
 P0102 P0103 Mass air flow sensor
 P0112 P0113 Intake air temperature sensor
 P0117 P0118 Engine coolant temperature sensor
 P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
 P0327 P0328 P0332 P0333 Knock sensor
 P0335 Crankshaft position sensor (POS)
 P0340 P0345 Camshaft position sensor (PHASE)
 P0500 Vehicle speed sensor
 P0605 P0607 ECM
 P0643 Sensor power supply
 P0705 P0850 Park/Neutral position (PNP) switch
 P1550 P1551 P1552 P1553 P1554 Battery current sensor
 P1610 - P1615 NATS
 P1700 CVT control system
 P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

ECM
EC-389
< ECU DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
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MA
EC
N
P O
DTC IndexINFOID:0000000003856872
×:Applicable —: Not applicable
2  P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater
 P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
 P0075 P0081 Intake valve timing control solenoid valve
 P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
 P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
 P0444 EVAP canister purge volume control solenoid valve
 P0550 Power steering pressure sensor
 P0603 ECM power supply
 P0710 P0715 P0720 P0740 P0744 P0745 P0746 P0776 P0778 P0840 P0845 P1740 CVT related sensors, solenoid valves
and switches
 P1217 Engine over temperature (OVERHEAT)
 P1720 Vehicle speed sensor
 P1777 P1778 CVT step motor
 P1800 P1801 VIAS control solenoid valve
 P1805 Brake switch
 P2100 P2103 Throttle control motor relay
 P2101 Electric throttle control function
 P2118 Throttle control motor
3  P0011 P0021 Intake valve timing control
 P0171 P0172 P0174 P0175 Fuel injection system function
 P0300 - P0306 Misfire
 P0420 P0430 Three way catalyst function
 P1212 TCS communication line
 P1564 ASCD steering switch
 P1572 ASCD brake switch
 P1574 ASCD vehicle speed sensor
 P1715 Primary speed sensor
 P2119 Electric throttle control actuator Priority Detected items (DTC)
Items
(CONSULT-III screen terms)DTC*
1
SRT code Trip MIReference
page CONSULT-III
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*4—1×EC-135
CAN COMM CIRCUIT U1001
1001*4—2 —EC-135
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000——
Flashing*6—
INT/V TIM CONT-B1 P0011 0011 — 2 —EC-136
INT/V TIM CONT-B2 P0021 0021 — 2 —EC-136
A/F SEN1 HTR (B1) P0031 0031 — 2×EC-140
A/F SEN1 HTR (B1) P0032 0032 — 2×EC-140
HO2S2 HTR (B1) P0037 0037 — 2×EC-143
HO2S2 HTR (B1) P0038 0038 — 2×EC-143
A/F SEN1 HTR (B2) P0051 0051 — 2×EC-140
A/F SEN1 HTR (B2) P0052 0052 — 2×EC-140
HO2S2 HTR (B2) P0057 0057 — 2×EC-143
HO2S2 HTR (B2) P0058 0058 — 2×EC-143
INT/V TIM V/CIR-B1 P0075 0075 — 2×EC-146
INT/V TIM V/CIR-B2 P0081 0081 — 2×EC-146
MAF SEN/CIRCUIT-B1 P0102 0102 — 1×EC-149
MAF SEN/CIRCUIT-B1 P0103 0103 — 1×EC-149