2003 NISSAN TEANA ignition

EC-52
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TROUBLE DIAGNOSIS

TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionBBS005BZ
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the Work Flow on EC-53, "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on EC-57, "
Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
MEF036D
SEF233G
SEF234G

EC-60
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TROUBLE DIAGNOSIS

Symptom Matrix ChartBBS005C2
SYSTEM — BASIC ENGINE CONTROL SYSTEM
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 pump circuit 11232 22 3 2EC-295
Fuel pressure regulator system334444444 4EC-49
Fuel injector circuit 11232 22 2EC-289
Evaporative emission system 334444444 4EC-27
Air Positive crankcase ventilation sys-
tem334444444 41EC-30
Incorrect idle speed adjustment 33 1111 1EC-40
Electric throttle control actuator 112332222 2 2EC-197
,
EC-200
,
EC-207
,
EC-213
IgnitionIncorrect ignition timing adjustment33111 11 1EC-40
Ignition circuit 11222 22 2EC-329
Main power supply and ground circuit 22333 33 23EC-106
Mass air flow sensor circuit 11222 22 2EC-124
Engine coolant temperature sensor circuit 11222322312EC-131
Throttle position sensor circuit 12 22222 2EC-136
,
EC-157
,
EC-229
,
EC-231
,
EC-265
Accelerator pedal position sensor circuit3212 2EC-233
,
EC-251
,
EC-258
,
EC-272
Heated oxygen sensor 1 circuit 1232 22 2EC-143
,
EC-150
,
EC-301
Knock sensor circuit 2 2 3EC-164
Crankshaft position sensor (POS) circuit 2 2EC-169
Camshaft position sensor (PHASE) circuit 2 2EC-176
Vehicle speed signal circuit 2 3 3 3EC-183
Power steering pressure sensor circuit 2 3333EC-185

TROUBLE DIAGNOSIS
EC-73
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2R/LHeated oxygen sensor 2
heater[Engine is running]

Engine speed: Below 3,800 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 load0 - 1.0V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed: Above 3,800 rpmBATTERY VOLTAGE
(11 - 14V)
3 G/WThrottle control motor relay
power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4LThrottle control motor
(Close)[Ignition switch: ON]

Engine stopped

Shift lever: D

Accelerator pedal: Fully released0 - 14V
5YThrottle control motor
(Open)[Ignition switch: ON]

Engine stopped

Shift lever: D

Accelerator pedal: Fully depressed0 - 14V
12 WPower steering pressure
sensor[Engine is running]

Steering wheel: Being turned0.5 - 4.0V
[Engine is running]

Steering wheel: Not being turned0.4 - 0.8V
13 WCrankshaft position
sensor (POS)[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idleApproximately 3.0V
[Engine is running]

Engine speed: 2,000 rpmApproximately 3.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB1104E
PBIB1105E
PBIB0527E
PBIB0528E

TROUBLE DIAGNOSIS
EC-75
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22
23
41
42R/Y
R/B
LG/R
R/WFuel injector No. 3
Fuel injector No. 1
Fuel injector No. 4
Fuel injector No. 2[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
24 O/BHeated oxygen sensor 1
heater[Engine is running]

Warm-up condition

Engine speed: Below 3,600 rpmApproximately 7.0V
[Engine is running]

Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
29 BSensor ground
[Camshaft position sensor
(PHASE)][Engine is running]

Warm-up condition

Idle speedApproximately 0V
30 BSensor ground
[Crankshaft position sensor
(POS)][Engine is running]

Warm-up condition

Idle speedApproximately 0V
34 L/YIntake air temperature sen-
sor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
35 W/B Heated oxygen sensor 1[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm0 - Approximately 1.0V
(Periodically change)
46 BR/WSensor power supply
(Refrigerant pressure sen-
sor)[Ignition switch: ON]Approximately 5V
47 GSensor power supply
(Throttle position sensor)[Ignition switch: ON]Approximately 5V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0529E
PBIB0530E
PBIB0519E

EC-76
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TROUBLE DIAGNOSIS

49 W Throttle position sensor 1[Ignition switch: ON]

Engine stopped

Shift lever: D

Accelerator pedal: Fully releasedMore than 0.36V
[Ignition switch: ON]

Engine stopped

Shift lever: D

Accelerator pedal: Fully depressedLess than 4.75V
50 W Mass air flow sensor[Ignition switch: ON]Approximately 0.4V
[Engine is running]

Warm-up condition

Idle speed0.7 - 1.0V
[Engine is running]

Warm-up condition

Engine: Revving from idle to about 4,000
rpm0.7 - 1.0 to Approximately 2.4V
(Check for liner voltage rise in
response to engine being
increased to about 4,000 rpm.)
54 —Sensor ground
(Knock sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
57 BSensor ground
(IAT sensor/ PSP sensor/
Refrigerant pressure sen-
sor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
60
61
79
80L/R
Y/R
G/Y
G/RIgnition signal No. 3
Ignition signal No. 1
Ignition signal No. 4
Ignition signal No. 2[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle0 - 0.1V
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm0 - 0.2V
62 GIntake valve timing
control solenoid valve[Engine is running]

Warm-up condition

Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpmApproximately 4V - BATTERY
VOLTAGE (11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0521E
PBIB0522E
PBIB1790E

TROUBLE DIAGNOSIS
EC-77
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65 LG/BSensor power supply
(Power steering pressure
sensor)[Ignition switch: ON]Approximately 5V
66 BSensor ground
(Throttle position sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
67 BSensor ground
(Mass air flow sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
68 R Throttle position sensor 2[Ignition switch: ON]

Shift lever: D

Accelerator pedal: Fully releasedLess than 4.75V
[Ignition switch: ON]

Shift lever: D

Accelerator pedal: Fully depressedMore than 0.36V
69 W Refrigerant pressure sensor[Engine is running]

Warm-up condition

Both A/C switch and blower fan switch:
ON
(Compressor operates)1.0 - 4.0V
72 LGEngine coolant tempera-
ture sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with engine
coolant temperature.
73 B/WSensor ground
(Engine coolant tempera-
ture sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
74 BSensor ground
(Heated oxygen sensor)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
82 BSensor ground
(Accelerator pedal position
sensor 1)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
83 GSensor ground
(Accelerator pedal position
sensor 2)[Engine is running]

Warm-up condition

Idle speedApproximately 0V
85 O DATA link connector[Ignition switch: ON]

CONSULT-II: DisconnectedBATTERY VOLTAGE
(11 - 14V)
86 P CAN communication line[Ignition switch: ON]1.0 - 2.5V
90 R/WSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch: ON]Approximately 5V
91 PSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch: ON]Approximately 5V
94 L CAN communication line[Ignition switch: ON]2.5 - 4.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)

EC-78
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TROUBLE DIAGNOSIS

98 LGAccelerator pedal position
sensor 2[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.28 - 0.48V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressedMore than 2.0V
101 R/G Stop lamp switch[Ignition switch: OFF]

Brake pedal: Fully releasedApproximately 0V
[Ignition switch: OFF]

Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
102 G/W PNP switch[Ignition switch: ON]

Shift lever: P or NApproximately 0V
[Ignition switch: ON]

Except above positionBATTERY VOLTAGE
(11 - 14V)
103 W/LTachometer signal
output[Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle.10 - 11V
[Engine is running]

Engine speed is 2,000 rpm10 - 11V
104 O Throttle control motor relay[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]0 - 1.0V
106 WAccelerator pedal position
sensor 1[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.65 - 0.87V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressedMore than 4.3V
109 R Ignition switch[Ignition switch: OFF]0V
[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
111 W / BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF0 - 1.0V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
MBIB0053E
MBIB0054E

TROUBLE DIAGNOSIS
EC-79
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)113 B/R Fuel pump relay[Ignition switch: ON]

For 1 second after turning ignition switch
ON
[Engine is running]0 - 1.0V
[Ignition switch: ON]

More than 1 second after turning ignition
switch ONBATTERY VOLTAGE
(11 - 14V)
11 5
11 6B
BECM ground[Engine is running]

Idle speedBody ground
11 9
120R/G
R/GPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
121 W/LPower supply for ECM
(Back-up)[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)