2001 NISSAN ALMERA ECU

SEF032X
Without CONSULT-II
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminals 63 (HO2S2 sig-
nal) and engine ground.
4) Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V at least once.
If the voltage is above 0.68V at step 4, step 5 is not nec-
essary.
5) Check the voltage when revving up to 6,000 rpm under no
load. Or keep vehicle at idling for 10 minutes, then check the
voltage. Or check the voltage when coasting from 80 km/h (50
MPH) in 3rd gear position (M/T), D position with ªODº OFF
(A/T).
The voltage should be below 0.56V at least once.
CAUTION:
+Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
+Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 (REAR)QG
Component Inspection (Cont'd)
EC-468

Diagnostic ProcedureNJEC1246
1 CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set the voltmeter probe between ECM terminals 3 [HO2S2 HTR (B1) signal] and ground.
4. Check the voltage under the following conditions.
SEF241Z
OK or NG
OK©INSPECTION END
NG©GO TO 2.
2 CHECK POWER SUPPLY
1. Turn ignition switch ªOFFº.
2. Disconnect heated oxygen sensor 2 (rear) harness connector.
SEF160Z
3. Turn ignition switch ªONº.
4. Check voltage between terminal 2 and ground.
SEF218W
OK or NG
OK©GO TO 4.
NG©GO TO 3.
HEATED OXYGEN SENSOR 2 HEATER (REAR)QG
Diagnostic Procedure
EC-472

JEF369Y
13. Install the front chain case.
a. Install the tension guide to the back side of the front chain
case.
+If the front chain case is tilted, the tension guide may fall off.
Therefore, when installing the front chain case, hold it verti-
cally.
JEF370Y
b. Apply Three Bond 1207C (KP510 00150) to both ends of the
arch area of the oil pump (contact surface of rear chain case)
as shown in the figure.
c. Install the front chain case.
+Align the dowel pin of the oil pump case to the pin hole, then
install it.
+Install bolts 6, 10, and 11 (shown in the figure) with the rubber
washer to the front chain case.
JEF352Y
d. Tighten the mounting bolts in the numerical order shown in the
figure.
e. After all bolts are tightened, tighten the mounting bolts in the
numerical order shown in the figure again.
14. Install the fuel injection pump rear bracket.
+Tighten all the bolts temporarily, then tighten them securely
with the mounting face securely contacting the fuel injection
pump and the pump bracket.
JEF351Y
15. Connect the fuel injection pump harness connector.
+Insert the harness connector securely until the stopper locks.
+Push the connector half way first, then press the stopper until
it locks, so that the connector is connected together.
16. Connect the fuel hoses.
+When the hoses are disconnected at the fuel gallery side,
insert until the hoses contact the valve, then install the clamp
securely.
17. Install other parts in the reverse order of removal.
BASIC SERVICE PROCEDUREYD
Electronic Control Fuel Injection Pump (Cont'd)
EC-624

Relationship Between MI, DTC, CONSULT-II and Driving PatternsNJEC0628S07
SEF879Y
*1: When a malfunction is detected,
MI will light up.
*2: When the same malfunction is
detected in two consecutive driv-
ing patterns, MI will stay lit up.
*3: MI will go off after vehicle is driven
three times without any malfunc-
tions.*4: When a malfunction is detected
for the first time, the DTC will be
stored in ECM.
*5: The DTC will not be displayed any
longer after vehicle is driven 40
times without the same malfunc-
tion. (The DTC still remain in
ECM.)*6: Other screens except SELF-DIAG-
NOSTIC RESULTS & DATA
MONITOR (AUTO TRIG) cannot
display the malfunction. DATA
MONITOR (AUTO TRIG) can dis-
play the malfunction at the
moment it is detected.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONYD
Malfunction Indicator (MI) (Cont'd)
EC-631

DescriptionNJEC0637Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er's complaint often do not recur on DTC visits. Realize also that the most frequent cause of I/I occurrences
is poor electrical connections. Because of this, the conditions under which the incident occurred may not be
clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the spe-
cific problem area.
COMMON I/I REPORT SITUATIONSNJEC0637S01
STEP in Work Flow Situation
II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than ª0º.
III The symptom described by the customer does not recur.
IV DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for XXXX does not indicate the problem area.
Diagnostic ProcedureNJEC0638
1 INSPECTION START
Erase DTCs. Refer to ªHOW TO ERASE DTCº, EC-627.
©GO TO 2.
2 CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to GI-22, ªGROUND INSPECTIONº.
OK or NG
OK©GO TO 3.
NG©Repair or replace.
3 SEARCH FOR ELECTRICAL INCIDENT
Perform GI-22, ªIncident Simulation Testsº.
OK or NG
OK©INSPECTION END
NG©Repair or replace.
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTYD
Description
EC-665

CEL501
ReplacementNJEL0010For removal and installation of spiral cable, refer to RS-32,
RS-29, ª Installation Ð Air Bag Module and Spiral Cableº.
+Each switch can be replaced without removing combination
switch base.
CEL406
+To remove combination switch base, remove base attaching
screw.
SEL151V
+Before installing the steering wheel, align the steering wheel
guide pins with the screws which secure the combination
switch as shown in the left figure.
COMBINATION SWITCH
Replacement
EL-58

SEL450XA
RemovalNJEL0060S02011. Remove cowl top seal rubber and cowl top cover.
2. Remove wiper motor connector.
3. Remove 3 screws that secure wiper motor and wiper frame.
4. Detach wiper motor from wiper linkage at ball joint.
5. Remove wiper linkage.
Be careful not to break ball joint rubber boot.
InstallationNJEL0060S0202+Grease ball joint portion before installation.
1. Installation is the reverse order of removal.
GEL013-A
Washer Nozzle AdjustmentNJEL0061+Adjust washer nozzle with suitable tool as shown in the figure
at left.
Adjustable range:±10É (In any direction)
FRONT WIPER AND WASHER
Removal and Installation (Cont'd)
EL-223

System Description/Sedan=NJEL0381Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
+through 15A fuse (No. 32, located in the fusible link and fuse block)
+to audio unit terminal 9
+to CD auto changer terminal 32.
With the ignition switch in the ACC or ON position, power is supplied
+through 10A fuse [No. 1, located in the fuse block (J/B)]
+to audio unit terminal 3,
+to CD auto changer terminal 36
Ground is supplied through the case of the audio unit.
Audio signals are supplied
+through audio unit terminals 7, 10, 11, 12, 13, 14, 15, 16
+to terminals 1 and 2 of front door speaker LH and RH,
+to terminals 1 and 2 of rear door speaker LH and RH and
+to terminals 1 and 2 of pillar tweeter LH and RH (with 6 speakers)
When the navigation system is triggered,
power is supplied
+through navi control unit terminal 46
+to speaker relay terminal 2
Ground is supplied
+through navi control unit terminal 44
+to speaker relay terminal 1
With power and ground supplied, the relay is energized, and then audio signal is interrupted to front door
speaker RH (LHD models) or LH (RHD models), and pillar tweeter RH (LHD models) or LH (RHD models)
For detailed, refer to ªNAVIGATION SYSTEMº.
NATS AUDIO LINKNJEL0381S04DescriptionNJEL0381S0401The link with the NATS IMMU implies that the audio unit can basically only be operated if connected to the
matching NATS IMMU to which the audio unit was initially fitted on the production line.
Since radio operation is impossible after the link with the NATS is disrupted theft of the audio unit is basically
useless since special equipment is required to reset the audio unit.
Initialization process for audio units that are linked to the NATS IMMU
New audio units will be delivered to the factories in the ªNEWº state, i.e. ready to be linked with the vehicle's
NATS. When the audio unit in ªNEWº state is first switched on at the factory, it will start up communication
with the vehicle's immobiliser control unit (IMMU) and send a code (the ªaudio unit Codeº) to the IMMU. The
IMMU will then store this code, which is unique to each audio unit, in its (permanent) memory.
Upon receipt of the code by the IMMU, the NATS will confirm correct receipt of the audio unit code to the audio
unit. Hereafter, the audio unit will operate as normal.
During the initialisation process, ªNEWº is displayed on the audio unit display. Normally though, communica-
tion between audio unit and IMMU takes such a short time (300 ms) that the audio unit seems to switch on
directly without showing ªNEWº on its display.
Normal operation
Each time the audio unit is switched on afterwards, the audio unit code will be verified between the audio unit
and the NATS before the audio unit becomes operational. During the code verification process, ªWAITº is
shown on the audio unit display. Again, the communication takes such a short time (300 ms) that the audio
unit seems to switch on directly without showing ªWAITº on its display.
When the radio is locked
In case of a audio unit being linked with the vehicle's NATS (immobilizer system), disconnection of the link
between the audio unit and the IMMU will cause the audio unit to switch into the lock (ªSECUREº) mode in
which the audio unit is fully inoperative. Hence, repair of the audio unit is basically impossible, unless the audio
unit is reset to the ªNEWº state for which special decoding equipment is required.
Clarion has provided their authorized service representatives with so called ªdecoder boxesº which can bring
the audio unit back to the ªNEWº state, enabling the audio unit to be switched on after which repair can be
AUDIO
System Description/Sedan
EL-258