2007 NISSAN 350Z light

EC-18
PRECAUTIONS
Revision: 2006 November2007 350Z
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NBS00029
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Battery ServiceNBS0002A
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Procedures without Cowl Top CoverNBS006TI
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
On Board Diagnostic (OBD) System of Engine and A/TNBS0002B
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to 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 MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up 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-
locking type harness connector. For description and how to disconnect, refer to PG-76, "
HAR-
NESS CONNECTOR" .

Be sure to route and secure the harnesses properly after work. The interference of the harness
with a bracket, etc. may cause the MIL to light up due to the short circuit.
PIIB3706J

PRECAUTIONS
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Revision: 2006 November2007 350Z

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
PrecautionNBS0002C

Always use a 12 volt battery as power source.

Do not attempt to disconnect battery cables while engine is
running.

Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect battery
ground 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
disconnect battery ground cable.

Do not 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.
Engine operation can vary slightly when the terminal is dis-
connected. However, this is not an indication of a malfunc-
tion. Do not 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 freeze frame data
–System readiness test (SRT) codes
–Test values

When connecting ECM harness connector (A), fasten (B) it
securely with a lever as far as it will go as shown in the fig-
ure.

When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.

Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.
SEF289H
1: ECM
C : Loosen
PBIB3532E
PBIB3528E
PBIB0090E

EC-20
PRECAUTIONS
Revision: 2006 November2007 350Z

Keep engine control system harness at least 10 cm (4 in) away from adjacent harness, to prevent
engine control system malfunctions 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 Refer-
ence Value inspection and make sure ECM functions prop-
erly. Refer to EC-103, "
ECM Terminals and Reference Value"
.

Handle mass air flow sensor carefully to avoid damage.

Do not clean mass air flow sensor with any type of deter-
gent.

Do not disassemble electric throttle control actuator.

Even a slight leak in the air intake system can cause seri-
ous incidents.

Do not shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).

After performing each TROUBLE DIAGNOSIS, perform DTC
Confirmation Procedure or Overall Function Check.
The DTC should not be displayed in the DTC Confirmation
Procedure if the repair is completed. The Overall Function
Check should be a good result if the repair is completed.

When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.

Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM's
transistor. Use a ground other than ECM terminals, such as
the ground.
MEF040D
SEF217U
SEF348N

EC-30
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2006 November2007 350Z
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS0002M
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET indicator in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Clutch pedal is depressed or gear position is changed to the neutral position (M/T models)

Selector lever is changed to N, P, R position (A/T models)

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

VDC/TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD clutch switch (M/T models) Clutch pedal operation
ASCD steering switch ASCD steering switch operation
Park/neutral position (PNP) switch Gear position
Wheel sensor. Vehicle speed*
TCM (A/T models) Powertrain revolution*

EC-46
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2006 November2007 350Z
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)PFP:25386
DescriptionNBS0002Y

If the security indicator lights up with the ignition switch in the ON position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-III using NATS program card. Refer to BL-150, "
NVIS (NISSAN VEHICLE IMMOBILIZER
SYSTEM-NATS)" .

Confirm no self-diagnostic results of NVIS (NATS) is displayed before touching “ERASE” in
“SELF-DIAG RESULTS” mode with CONSULT-III.

When replacing ECM, initialization of NVIS (NATS) system and registration of all NVIS (NATS) igni-
tion key IDs must be carried out with CONSULT-III using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NVIS
(NATS) initialization and all NVIS (NATS) ignition key ID registration, refer to CONSULT-III Opera-
tion Manual, IVIS/NVIS.

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionNBS0002Z
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×: Applicable —: Not applicable
*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode.
(Refer to EC-89, "
Fail-safe Chart" .)
Two Trip Detection LogicNBS00030
When a malfunction is detected for the 1st time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd
trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
×: Applicable —: Not applicable
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.
Emission-related diagnostic information Diagnostic service
Diagnostic Trouble Code (DTC) Service $03 of SAE J1979
Freeze Frame data Service $02 of SAE J1979
System Readiness Test (SRT) code Service $01 of SAE J1979
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of SAE J1979
1st Trip Freeze Frame data
Test values and Test limits Service $06 of SAE J1979
Calibration ID Service $09 of SAE J1979
DTC 1st trip DTCFreeze Frame
data1st trip Freeze
Frame dataSRT status SRT code Test value
CONSULT-III××××××—
GST×××—×××
ECM×× *— —×——
ItemsMIL DTC 1st trip DTC
1st trip 2nd trip
1st trip
displaying2nd trip
displaying1st trip
displaying2nd trip
display-
ing BlinkingLighting
upBlinkingLighting
up
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected×———— —×—
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected——×——×——
One trip detection diagnoses
(Refer to EC-48, "
EMISSION-
RELATED DIAGNOSTIC INFOR-
MATION ITEMS" .)—×——×———
Except above — — —×—××—

EC-48
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2006 November2007 350Z
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.
Emission-related Diagnostic InformationNBS00031
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
×: Applicable —: Not applicable Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-III screen terms)DTC*
1
SRT codeTest value/
Te s t l i m i t
(GST only)TripMIL lighting
upReference
page CONSULT-III
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*5—— 1×EC-151
CAN COMM CIRCUIT U1001
1001*5—— 2 —EC-151
CONTROL UNIT(CAN) U1010 1010 — —1 (A/T)× (A/T)
EC-1542 (M/T) — (M/T)
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000—— —
Flashing*
7EC-63
INT/V TIM CONT-B1 P0011 0011 — — 2×EC-156
EXH/V TIM CONT-B1 P0014 0014 — — 2×EC-160
INT/V TIM CONT-B2 P0021 0021 — — 2×EC-156
EXH/V TIM CONT-B2 P0024 0024 — — 2×EC-160
A/F SEN1 HTR (B1) P0031 0031 —×2×EC-165
A/F SEN1 HTR (B1) P0032 0032 —×2×EC-165
HO2S2 HTR (B1) P0037 0037 —×2×EC-173
HO2S2 HTR (B1) P0038 0038 —×2×EC-173
A/F SEN1 HTR (B2) P0051 0051 —×2×EC-165
A/F SEN1 HTR (B2) P0052 0052 —×2×EC-165
HO2S2 HTR (B2) P0057 0057 —×2×EC-173
HO2S2 HTR (B2) P0058 0058 —×2×EC-173
INT/V TIM V/CIR-B1 P0075 0075 — — 2×EC-183
EX V/T MGT/RTDR-B1 P0078 0078 — — 2×EC-190
INT/V TIM V/CIR-B2 P0081 0081 — — 2×EC-183
EX V/T MGT/RTDR-B2 P0084 0084 — — 2×EC-190
MAF SEN/CIRCUIT-B1 P0101 0101 — — 2×EC-197
MAF SEN/CIRCUIT-B1 P0102 0102 — — 1×EC-208
MAF SEN/CIRCUIT-B1 P0103 0103 — — 1×EC-208
MAF SEN/CIRCUIT-B2 P010B 010B — — 2×EC-197
MAF SEN/CIRCUIT-B2 P010C 010C — — 1×EC-208
MAF SEN/CIRCUIT-B2 P010D 010D — — 1×EC-208
IAT SEN/CIRCUIT-B1 P0112 0112 — — 2×EC-218
IAT SEN/CIRCUIT-B1 P0113 0113 — — 2×EC-218
ECT SEN/CIRC P0117 0117 — — 1×EC-223
ECT SEN/CIRC P0118 0118 — — 1×EC-223
TP SEN 2/CIRC-B1 P0122 0122 — — 1×EC-229
TP SEN 2/CIRC-B1 P0123 0123 — — 1×EC-229

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: 2006 November2007 350ZECT SENSOR P0125 0125 — — 2×EC-239
IAT SENSOR-B1 P0127 0127 — — 2×EC-243
THERMSTAT FNCTN P0128 0128 — — 2×EC-246
A/F SENSOR1 (B1) P0130 0130 —×2×EC-248
A/F SENSOR1 (B1) P0131 0131 —×2×EC-257
A/F SENSOR1 (B1) P0132 0132 —×2×EC-266
A/F SENSOR1 (B1) P0133 0133××2×EC-275
HO2S2 (B1) P0137 0137××2×EC-287
HO2S2 (B1) P0138 0138××2×EC-298
HO2S2 (B1) P0139 0139××2×EC-313
A/F SENSOR1 (B2) P0150 0150 —×2×EC-248
A/F SENSOR1 (B2) P0151 0151 —×2×EC-257
A/F SENSOR1 (B2) P0152 0152 —×2×EC-266
A/F SENSOR1 (B2) P0153 0153××2×EC-275
HO2S2 (B2) P0157 0157××2×EC-287
HO2S2 (B2) P0158 0158××2×EC-298
HO2S2 (B2) P0159 0159××2×EC-313
FUEL SYS-LEAN-B1 P0171 0171 — — 2×EC-324
FUEL SYS-RICH-B1 P0172 0172 — — 2×EC-334
FUEL SYS-LEAN-B2 P0174 0174 — — 2×EC-324
FUEL SYS-RICH-B2 P0175 0175 — — 2×EC-334
FTT SENSOR P0181 0181 — — 2×EC-344
FTT SEN/CIRCUIT P0182 0182 — — 2×EC-348
FTT SEN/CIRCUIT P0183 0183 — — 2×EC-348
EOT SENSOR P0196 0196 — — 2×EC-352
EOT SEN/CIRCUIT P0197 0197 — — 2×EC-239
EOT SEN/CIRCUIT P0198 0198 — — 2×EC-239
TP SEN 1/CIRC-B1 P0222 0222 — — 1×EC-361
TP SEN 1/CIRC-B1 P0223 0223 — — 1×EC-361
TP SEN 2/CIRC-B2 P0227 0227 — — 1×EC-229
TP SEN 2/CIRC-B2 P0228 0228 — — 1×EC-229
MULTI CYL MISFIRE P0300 0300 — — 2×EC-371
CYL 1 MISFIRE P0301 0301 — — 2×EC-371
CYL 2 MISFIRE P0302 0302 — — 2×EC-371
CYL 3 MISFIRE P0303 0303 — — 2×EC-371
CYL 4 MISFIRE P0304 0304 — — 2×EC-371
CYL 5 MISFIRE P0305 0305 — — 2×EC-371
CYL 6 MISFIRE P0306 0306 — — 2×EC-371
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 —EC-379
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-379
KNOCK SEN/CIRC-B2 P0332 0332 — — 2 —EC-379
KNOCK SEN/CIRC-B2 P0333 0333 — — 2 —EC-379
Items
(CONSULT-III screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)TripMIL lighting
upReference
page CONSULT-III
GST*
2ECM*3