2003 NISSAN ALMERA N16 Engine Control

EC-360
[QG (WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
DTC P1805 BRAKE SWITCH
PFP:25320
DescriptionEBS00KCL
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor ModeEBS00KCM
Specification data are reference values.
On Board Diagnosis LogicEBS00KCN
The MI will not light up for this self-diagnosis.
FALI-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureEBS00KCO
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-II.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-362, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW
●Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805Brake switchA brake switch signal is not sent to ECM for
an extremely long time while the vehicle is
driving.
●Harness or connectors
(Stop lamp switch circuit is open or shorted.)
●Stop lamp switch
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Driving condition
When engine is idling Normal
When accelerating Poor acceleration
SEF058Y

INJECTOR CIRCUIT
EC-375
[QG (WITH EURO-OBD)]
C
D
E
F
G
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MA
EC
INJECTOR CIRCUITPFP:16600
Component DescriptionEBS00KCX
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the needle valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeEBS00KCY
Specification data are reference values.
SEF375Z
MONITOR ITEM CONDITION SPECIFICATION
B/FUEL SCHDL
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 1.5 - 3.0 msec
2,000 rpm 1.2 - 3.0 msec
INJ PULSE-B1
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 2.0 - 3.5 msec
2,000 rpm 1.5 - 3.5 msec

FUEL PUMP CIRCUIT
EC-381
[QG (WITH EURO-OBD)]
C
D
E
F
G
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MA
EC
FUEL PUMP CIRCUITPFP:17042
DescriptionEBS00KD3
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and cam-
shaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the
engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump
operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel
pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
COMPONENT DESCRIPTION
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor ModeEBS00KD4
Specification data are reference values.
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
*
Fuel pump control Fuel pump relay
Battery
Battery voltage
*
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and crankingOperates.
When engine is stoppedStops in 1.5 seconds.
Except as shown aboveStops.
MBIB0046E
MONITOR ITEM CONDITION SPECIFICATION
FUEL PUMP RLY
●For 1 seconds after turning ignition switch ON
●Engine running or crankingON
●Except above conditions OFF

EVAPORATIVE EMISSION SYSTEM
EC-399
[QG (WITH EURO-OBD)]
C
D
E
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EC
EVAPORATIVE EMISSION SYSTEMPFP:14950
DescriptionEBS00KDJ
SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel
system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the
vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the
engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the
engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is
proportionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and
idling.
PBIB0491E

INDEX FOR DTC
EC-407
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
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K
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MA
EC
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: The trouble shooting for this DTC needs CONSULT-II.
DTC No. IndexEBS00KE1
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on the
identification plate. Refer to GI-39.
NOTE:
If DTC U1000 or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-492, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
×: Applicable —: Not applicable NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000———
SENSOR POWER/CIRC P1229 1229 1×EC-624
TP SEN 1/CIRC P0222 0222 1×EC-530
TP SEN 1/CIRC P0223 0223 1×EC-530
TP SEN 2/CIRC P1223 1223 1×EC-607
TP SEN 2/CIRC P1224 1224 1×EC-607
TP SENSOR P0221 0221 1×EC-524
Items
(CONSULT-II screen terms)DTC
*1
TripMI lighting
upReference page
CONSULT-
II
*2ECM*3
DTC*1Items
(CONSULT-II screen terms)TripMI lighting
upReference page
CONSULT-II
*2ECM*3
No DTC
Flashing*4NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.—
Flashing*4EC-433
U1000
1000*5CAN COMM CIRCUIT 1×EC-492
U1001
1001*5CAN COMM CIRCUIT 2 —EC-492
P0000 0000NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.———
P0102 0102 MAF SEN/CIRCUIT 1×EC-495
P0103 0103 MAF SEN/CIRCUIT 1×EC-495
P0117 0117 ECT SEN/CIRCUIT 2×EC-501
P0118 0118 ECT SEN/CIRCUIT 2×EC-501
P0132 0132 HO2S1 (B1) 2×EC-506
P0134 0134 HO2S1 (B1) 2×EC-512
P0138 0138 HO2S2 (B1) 2×EC-518
P0221 0221 TP SENSOR 1×EC-524
P0222 0222 TP SEN 1/CIRC 1×EC-530
P0223 0223 TP SEN 1/CIRC 1×EC-530
P0226 0226 APP SENSOR 1×EC-536
P0227 0227 APP SEN 1/CIRC 1×EC-543
P0228 0228 APP SEN 1/CIRC 1×EC-543
P0327 0327 KNOCK SEN/CIRC-B1 2 —EC-550
P0328 0328 KNOCK SEN/CIRC-B1 2 —EC-550

EC-408
[QG (WITHOUT EURO-OBD)]
INDEX FOR DTC
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: The troubleshooting for this DTC needs CONSULT-II.P0335 0335 CKP SEN/CIRCUIT 2×EC-554
P0340 0340 CMP SEN/CIRC-B1 2×EC-561
P0605 0605 ECM 1 or 2× or —EC-568
P1065 1065 ECM BACK UP/CIRC 2×EC-571
P1121 1121 ETC ACTR 1 or 2×EC-575
P1122 1122 ETC FUNCTION/CIRC 1×EC-578
P1124 1124 ETC MOT PWR 1×EC-585
P1126 1126 ETC MOT PWR 1×EC-585
P1128 1128 ETC MOT 1×EC-591
P1217 1217 ENG OVER TEMP 1×EC-596
P1223 1223 TP SEN 2/CIRC 1×EC-607
P1224 1224 TP SEN 2/CIRC 1×EC-607
P1225 1225 CTP LEARNING 2 —EC-613
P1226 1226 CTP LEARNING 2 —EC-615
P1227 1227 APP SEN 2/CIRC 1×EC-617
P1228 1228 APP SEN 2/CIRC 1×EC-617
P1229 1229 SENSOR POWER/CIRC 1×EC-624
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 —EC-431
P1805 1805 BRAKE SW/CIRCUIT 1×EC-628
DTC*1Items
(CONSULT-II screen terms)TripMI lighting
upReference page
CONSULT-II
*2ECM*3

EC-410
[QG (WITHOUT EURO-OBD)]
PRECAUTIONS
●Do not disassemble ECM.
●If battery cable is disconnected, the memory will return to
the initial ECM values.
The ECM will now start to self-control at its initial values.
Engine operation can vary slightly when the cable is dis-
connected. However, this is not an indication of a malfunc-
tion. Do not replace parts because of a slight variation.
●When connecting ECM harness connector, fasten it
securely with a lever as far as it will go as shown at right.
●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.
●Keep engine control system harness at least 10 cm (4 in)
away from adjacent harness, to prevent engine control sys-
tem 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-458, "
ECM Terminals and Reference Value"
.
●Handle mass air flow sensor carefully to avoid damage.
●Do not disassemble mass air flow sensor.
●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).
PBIB1164E
MBIB0145E
PBIB0090E
MEF040D

EC-412
[QG (WITHOUT EURO-OBD)]
PRECAUTIONS
●Do not depress accelerator pedal when starting.
●Immediately after starting, do not rev up engine unneces-
sarily.
●Do not rev up engine just prior to shutdown.
●When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
–Keep the antenna as far as possible from the electronic
control units.
–Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
–Adjust the antenna and feeder line so that the standing-
wave radio can be kept smaller.
–Be sure to ground the radio to vehicle body.
Wiring Diagrams and Trouble DiagnosisEBS00KE5
When you read wiring diagrams, refer to the following:
●GI-12
●EL-11 for power distribution circuit
When you perform trouble diagnosis, refer to the following:
●GI-32
●GI-22
SEF709Y
SEF708Y