Page 90 of 720
EC-90
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL 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 MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands
the driver to repair the malfunction.
Symptom Matrix ChartNBS0003G
SYSTEM — BASIC ENGINE CONTROL SYSTEM
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
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-691
Fuel pressure regulator system334444444 4EC-80
Fuel injector circuit 11232 22 2EC-686
Evaporative emission system 334444444 4EC-33
Air Positive crankcase ventilation sys-
tem
334444444 41EC-44
Incorrect idle speed adjustment 1 1 1 1 1EC-71
Electric throttle control actuator 112332222 2 2EC-561,
EC-580
IgnitionIncorrect ignition timing adjustment33111 11 1EC-71
Ignition circuit 11222 22 2EC-698
Power supply and ground circuit22333 33 23EC-142
Page 94 of 720
EC-94
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
Engine Control Component Parts LocationNBS0003I
1. IPDM E/R 2. Mass air flow sensor (with intake air
temperature sensor) (bank 1)3. Refrigerant pressure sensor
4. Cooling fan motor-2 5. Intake valve timing control solenoid
valve6. Exhaust valve timing control magnet
retarder
7. Cooling fan motor-1 8. Mass air flow sensor (with intake air
temperature sensor) (bank 2)9. Ignition coil (with power transistor)
and spark plug (bank 2)
10. Electric throttle control actuator
(bank 2)11. A/F sensor 1 (bank 2) 12. Exhaust valve timing control position
sensor
13. Camshaft position sensor (PHASE) 14. Fuel injector (bank 2) 15. Engine coolant temperature sensor
16. Knock sensor 17. EVAP canister purge volume con-
trol solenoid valve18. Fuel injector (bank 1)
19. Ignition coil (with power transistor)
and spark plug (bank 1)20. EVAP service port 21. A/F sensor 1 (bank 1)
22. Crankshaft position sensor (POS) 23. Electric throttle control actuator
(bank 1)
PBIB3474E
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EC-96
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
1. Ignition coil No.5 (with power tran-
sistor)2. Ignition coil No.3 (with power tran-
sistor)3. Ignition coil No.1 (with power tran-
sistor)
4. Condenser 5. Fuel injector No.3 6. Fuel injector No.1
7. Fuel injector No.2 8. Fuel injector No.4 9. Ignition coil No.2 (with power tran-
sistor)
10. Ignition coil No.4 (with power tran-
sistor)11. ignition coil No.6 (with power tran-
sistor)12. Fuel injector No.6
13. Fuel injector No.5 14. Knock sensor (bank 1) 15. Knock sensor (bank 2)
1. Engine coolant temperature sensor 2. A/F sensor 1 (bank 1) 3. Crankshaft position sensor
:Vehicle front
1. Cooling fan motor-1 2. Cooling fan motor-2
:Vehicle front
PBIB3520E
PBIB3521E
PBIB3509E
Page 104 of 720
![NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-104
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
2GThrottle control motor
(Open) (bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully de](/manual-img/5/762/w960_762-103.png "NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-104
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
2GThrottle control motor
(Open) (bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully de")
EC-104
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
2GThrottle control motor
(Open) (bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully depressed0 - 14V
[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released0 - 14V
3R/WThrottle control motor relay
power supply (bank 1)[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4BRThrottle control motor
(Close) (bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: In the middle of releasing
operation0 - 14V
5GY/LA/F sensor 1 heater
(bank 2)[Engine is running]
Warm-up condition
Idle speed
(More than 140 seconds after starting
engine)2.9 - 8.8
6 L/ORExhaust valve timing control
magnet retarder (bank 1)[Engine is running]
Warm-up condition
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Around 2,500 rpm while the engine speed is
rising7 - 12V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB3539E
PBIB3540E
PBIB3541E
PBIB3538E
PBIB3542E
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7Y/RExhaust valve timing control
magnet retarder (bank 2)[Engine is running]
Warm-up condition
Idle speedBATTERY](/manual-img/5/762/w960_762-104.png "NISSAN 350Z 2007 Z33 Engine Control Workshop Manual TROUBLE DIAGNOSIS
EC-105
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7Y/RExhaust valve timing control
magnet retarder (bank 2)[Engine is running]
Warm-up condition
Idle speedBATTERY")
TROUBLE DIAGNOSIS
EC-105
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7Y/RExhaust valve timing control
magnet retarder (bank 2)[Engine is running]
Warm-up condition
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Around 2,500 rpm while the engine speed is
rising7 - 12V
8 B/P ECM ground[Engine is running]
Idle speedBody ground
11
12
15
16
19
20GY
LG/R
PU
G/B
L/R
Y/BIgnition signal No. 4
Ignition signal No. 3
Ignition signal No. 5
Ignition signal No. 2
Ignition signal No. 6
Ignition signal No. 1[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.0 - 0.2V
[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm0.1 - 0.4V
17 PHeated oxygen sensor 2
heater (bank 1)[Engine is running]
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 load.0 - 14V
[Ignition switch: ON]
Engine stopped
[Engine is running]
Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
18 W/GIntake valve timing control
solenoid valve (bank 1)[Engine is running]
Warm-up condition
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm7 - 12V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB3542E
PBIB3543E
PBIB3544E
PBIB3545E
PBIB3546E
Page 106 of 720
![NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-106
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
21 GY/REVAP canister purge vol-
ume control solenoid valve[Engine is running]
Idle speed
Accelerator pedal: Not depressed even
slightly, af](/manual-img/5/762/w960_762-105.png "NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-106
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
21 GY/REVAP canister purge vol-
ume control solenoid valve[Engine is running]
Idle speed
Accelerator pedal: Not depressed even
slightly, af")
EC-106
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
21 GY/REVAP canister purge vol-
ume control solenoid valve[Engine is running]
Idle speed
Accelerator pedal: Not depressed even
slightly, after engine starting.BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)BATTERY VOLTAGE
(11 - 14V)
22 L/W Fuel pump relay[Ignition switch: ON]
For 1 second after turning ignition switch ON
[Engine is running]0 - 1.5V
[Ignition switch: ON]
More than 1 second after turning ignition
switch ON.BATTERY VOLTAGE
(11 - 14V)
24 BR/YECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
25 OR Throttle control motor relay[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]0 - 1.0V
29 G/WIntake valve timing control
solenoid valve (bank 2)[Engine is running]
Warm-up condition
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm7 - 12V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB3547E
PBIB3548E
PBIB3546E
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30 YThrottle position sensor 1
(bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Ac](/manual-img/5/762/w960_762-106.png "NISSAN 350Z 2007 Z33 Engine Control Workshop Manual TROUBLE DIAGNOSIS
EC-107
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Revision: 2006 November2007 350Z
30 YThrottle position sensor 1
(bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Ac")
TROUBLE DIAGNOSIS
EC-107
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Revision: 2006 November2007 350Z
30 YThrottle position sensor 1
(bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully releasedMore than 0.36V
[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully depressedLess than 4.75V
31 L/GThrottle position sensor 1
(bank 2)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully releasedMore than 0.36V
[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully depressedLess than 4.75V
33 PU/WHeated oxygen sensor 2
heater (bank 2)[Engine is running]
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 load.0 - 14V
[Ignition switch: ON]
Engine stopped
[Engine is running]
Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
34 LThrottle position sensor 2
(bank 1)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully releasedLess than 4.75V
[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully depressedMore than 0.36V
35 L/YThrottle position sensor 2
(bank 2)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully releasedLess than 4.75V
[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully depressedMore than 0.36V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB3545E
Page 108 of 720
![NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-108
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
37 LG/BCrankshaft position sensor
(POS)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at](/manual-img/5/762/w960_762-107.png "NISSAN 350Z 2007 Z33 Engine Control Workshop Manual EC-108
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
37 LG/BCrankshaft position sensor
(POS)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at")
EC-108
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
37 LG/BCrankshaft position sensor
(POS)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.4.0 - 5.0V
[Engine is running]
Engine speed: 2,000 rpm4.0 - 5.0V
40 RSensor ground
[Throttle position sensor
(bank 1)][Engine is running]
Warm-up condition
Idle speed0V
43 OR/LSensor power supply
[Throttle position sensor
(bank 2)][Ignition switch: ON]5V
44 BSensor power supply
[Throttle position sensor
(bank 1)][Ignition switch: ON]5V
46 R/BSensor power supply
[Crankshaft position sensor
(POS)][Ignition switch: ON]5V
47 Y/GSensor ground
[Crankshaft position sensor
(POS)][Engine is running]
Warm-up condition
Idle speed0V
48 W/LSensor ground
[Throttle position sensor
(bank 2)][Engine is running]
Warm-up condition
Idle speed0V
49 L/BThrottle control motor
(Close) (bank 2)[Ignition switch: ON]
Engine stopped
Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: In the middle of releasing
operation0 - 14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB3549E
PBIB3550E
PBIB3541E
