2003 NISSAN TEANA warning light

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-37
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When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
trouble on engine control system.
Therefore, when Electrical controlled throttle and part of the ECM related diagnoses are continuously detected
as NG for 5-trips, ECM warns the driver that engine control system has trouble and MI circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MI circuit are detected and demands the
driver to repair the trouble.
MI Flashing without DTC
If the ECM is in Diagnostic Test Mode II, MI may flash when engine is running. In this case, check ECM diag-
nostic test mode. EC-37, "
HOW TO SWITCH DIAGNOSTIC TEST MODE" .
How to switch the diagnostic test (function) modes, and details of the above functions are described later, EC-
37 .
The following emission-related diagnostic information is cleared when the ECM memory is erased.

Diagnostic trouble codes

1st trip diagnostic trouble codes

Freeze frame data

1st trip freeze frame data

Others
HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
Diagnostic Test
ModeKEY and ENG.
StatusFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MI will light up to inform the driver that
a malfunction has been detected.
The following malfunctions will light up or blink the MI in
the 1st trip.

One trip detection diagnoses
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs and 1st trip DTCs to be read.
Engine running HEATED OXYGEN SENSOR 1
MONITORThis function allows the fuel mixture condition (lean or
rich), monitored by heated oxygen sensor 1, to be read.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

PRECAUTIONS
EC-351
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
BBS004XC
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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.
On Board Diagnostic (OBD) System of EngineBBS004XD
The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) 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 MI to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI 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-71, "
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 MI to light up due to the short circuit.

Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM
before returning the vehicle to the customer.
PrecautionBBS004XE

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 negative
battery 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 negative battery cable.
SEF289H

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-377
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–1st trip freeze frame data
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
Malfunction Indicator (MI)BBS005AX
DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
If the MI does not light up, refer to DI-35, "
WARNING LAMPS"
or see EC-763 .
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.
When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
trouble on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses is 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 fail-safe function.
The fail-safe function also operate when above diagnoses except MI circuit are detected and demands the
driver to repair the trouble.
SAT652J
Diagnostic Test
ModeKEY and ENG
StatusFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MI will light up to inform the driver that
a malfunction has been detected.
One trip detection diagnosis will light up or blink the MI in
the 1st trip.
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs and 1st trip DTCs to be read.
Engine running HEATED OXYGEN SENSOR 1
MONITORThis function allows the fuel mixture condition (lean or
rich), monitored by heated oxygen sensor 1, to be read.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

PRECAUTIONS
GI-3
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PRECAUTIONSPFP:00001
DescriptionBAS0006Z
Observe the following precautions to ensure safe and proper servicing. These precautions are not
described in each individual section.
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
BAS00070
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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 NATS (NISSAN ANTI-THEFT SYSTEM)BAS00071
NATS will immobilize the engine if someone tries to start it without the registered key of NATS.
Both of the originally supplied ignition key IDs have been NATS registered.
The security indicator is located on the instrument panel. The indicator blinks when the immobilizer system is
functioning.
Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.

When NATS detects trouble, the security indicator lamp lights up while ignition switch is in "ON" position.
This lighting up indicates that the anti-theft is not functioning, so prompt service is required.

When servicing NATS (trouble diagnoses, system initialization and additional registration of other NATS
ignition key IDs), CONSULT-II hardware and CONSULT-II NATS software is necessary.
Regarding the procedures of NATS initialization and NATS ignition key ID registration, refer to CONSULT-
II operation manual, NATS.
Therefore, CONSULT-II NATS software (program card and operation manual) must be kept strictly con-
fidential to maintain the integrity of the anti-theft function.

When servicing NATS (trouble diagnoses, system initialization and additional registration of other NATS
ignition key IDs), it may be necessary to re-register original key identification. Therefore, be sure to
receive all keys from vehicle owner. A maximum of four or five key IDs can be registered into NATS.

When failing to start the engine first time using the key of NATS, start as follows.
1. Leave the ignition key in "ON" position for approximately 5 seconds.
2. Turn ignition key to "OFF" or "LOCK" position and wait approximately 5 seconds.
3. Repeat step 1 and 2 again.
4. Restart the engine while keeping the key separate from any others on key-chain.

CONSULT-II CHECKING SYSTEM
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CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionBAS0007K

CONSULT-II is a hand-held type tester. When it is connected with a diagnostic connector equipped on the
vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various
kinds of diagnostic tests.

Refer to “CONSULT-II Software Operation Manual” for more information.
Function and System Application BAS0007L
x: Applicable
*1:Nissan Anti-Theft System
Nickel Metal Hydride Battery Replacement BAS0007M
CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WARNING:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble or dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Diagnostic test
modeFunction
ENGINE
A/T
TRANSMISSION
AIR BAG
METER A/C AMP
IPDM E/R
BCM
ABS
ABS (Including VDC)
INTELLIGENT KEY
NATS
*1
HEADLAMP LEVELIZER
ADAPTIVE LIGHT
AUTO DRIVE POS.
REARVIEW CAMERA
Work supportThis mode enables a technician to adjust some devices faster
and more accurately by following the indications on CONSULT-
II.xxx- - - x - xx - xxxx
Self-diagnostic
resultsSelf-diagnostic results can be read and erased quickly. xxxxxxxxxx x xxx-
Trouble diagnos-
tic recordCurrent self-diagnostic results and all trouble diagnostic
records previously stored can be read.---x------ - ----
Data monitor Input/Output data in the ECU can be read. x x x - x xxxxx - xxxx
CAN diagnosis
support monitorThe condition of CAN communication line can be indicated. x x x - x xxxxx - - xx-
Active testDiagnostic Test Mode in which CONSULT-II drives some actua-
tors apart from the ECUs and also shifts some parameters in a
specified range.x- - - - xxxxx - xxx-
ECU (ECM/TCM)
part numberECU (ECM/TCM) part number can be read. x x x - - - - x x x - x x x x
ECU discrimi-
nated No.Classification number of a replacement ECU can be read to
prevent an incorrect ECU from being installed.---x------ - ----
Function testThis mode can show results of self-diagnosis of ECU with either
“OK” or “NG”. For engines, more practical tests regarding sen-
sors/switches and/or actuators are available.xxxx---xx- - ----
Control unit ini-
tializationAll registered ignition key IDs in NATS components can be ini-
tialized and new IDs can be registered.---------- x ----
DTC work sup-
portThe operating condition to confirm Diagnosis Trouble Codes
can be selected. -x-------- - ----
CALIB data Characteristic information can be read. - - x - ------ - ----
Configuration - - - - - - - x - - - - x - - -

TROUBLE DIAGNOSIS
LAN-51
[CAN]
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LAN

CAN Communication Signal ChartBKS002DP
Refer to LAN-15, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
TYPE 1/TYPE 2
NOTE:
Refer to LAN-41, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
Signals
ECM
ADP
BCM
M&A
DISP
TCM
ABS
IPDM-E
A/C compressor request signal T R
Accelerator pedal position signal T R
Closed throttle position signal T R
Cooling fan speed request signal T R
Engine and A/T integrated control signalTR
RT
Engine coolant temperature signal T R
Engine speed signal T R
Fuel consumption monitor signalTR
TR
Malfunction indicator signal T R
Wide open throttle position signal T R
A/C switch signal R T
Blower fan motor switch signal R T
Buzzer output signal T R
Door switch signal R T R R
Front fog light request signal T R R
Front wiper request signal T R
High beam request signal T R R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Oil pressure switch signalRT
TR
Position light request signal T R R
Rear fog status signal T R
Rear window defogger switch signal T R
Sleep wake up signal T R R
Turn indicator signal T R
3rd position switch signal T R
A/C switch/indicator signalRT
TR
Distance to empty signal T R
Fuel level low warning signal T R
Stop lamp switch signal T R

LAN-52
[CAN]
TROUBLE DIAGNOSIS

*: P range only
TYPE 3
NOTE:
Refer to LAN-41, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive Vehicle speed signalRT
RRR T R
A/T CHECK indicator lamp signal R T
A/T position indicator lamp signal
R
*RT
Output shaft revolution signal R T
ABS warning lamp signal R T
Brake warning lamp signal R T
Front wiper stop position signal R T
High beam status signal R T
Low beam status signal R T
Rear window defogger control signal R R R TSignals
ECM
ADP
BCM
M&A
DISP
TCM
ABS
IPDM-E
SignalsECM
ADP
AFS
BCM
I-KEY
M&A
STRG
DISP
TCM
ABS
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T R R
Closed throttle position signal T R
Cooling fan speed request signal TR
Engine and A/T integrated control signalTR
RT
Engine coolant temperature signal T R
Engine speed signal T R R
Fuel consumption monitor signalTR
TR
Malfunction indicator signal T R
Wide open throttle position signal T R
A/C switch signal R T
Blower fan motor switch signal R T
Buzzer output signalTR
TR
Door lock/unlock status signal T R
Door switch signal R T R R R
Front fog light request signal T R R
Front wiper request signal T R
High beam request signal T R R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T

TROUBLE DIAGNOSIS
LAN-53
[CAN]
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*: P range onlyLow beam request signal T R
Oil pressure switch signalRT
TR
Position light request signal T R R
Rear fog status signal T R
Rear window defogger switch signal T R
Sleep wake up signalTRR R
RT
Turn indicator signal T R
Door lock/unlock/trunk open request signal R T
Hazard warning lamp request signal R T
Ignition knob switch signal R T
Key warning signal T R
Starter permission signal R T
3rd position switch signal T R
A/C switch/indicator signalRT
TR
Distance to empty signal T R
Fuel level low warning signal T R
Stop lamp switch signal T R
Vehicle speed signalRT
RRRRR T R
Steering angle sensor signal R T R
A/T CHECK indicator lamp signal R T
A/T position indicator lamp signal
R
*RR T
Output shaft revolution signal R T
ABS warning lamp signal R T
Brake warning lamp signal R T
SLIP indicator lamp signal R T
VDC OFF indicator lamp signal R T
VDC operation signalRT
Front wiper stop position signal R T
High beam status signal R R T
Low beam status signal R R T
Rear window defogger control signal R R R TSignals
ECM
ADP
AFS
BCM
I-KEY
M&A
STRG
DISP
TCM
ABS
IPDM-E