sensor NISSAN ALMERA N15 1995 Service Manual

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)-
Dual AirBag System
Self-diagnosis DIAGNOSTIC PROCEDURE 1(@ without CONSULT)
Checking SRSoperation byusing" AIRBAG" warning lamp-
User mode

1. After turning ignition switchfrom"OFF" to"ON", "AIR
BAG" warning lampoperates.
2. Compare "AIRBAG" warning lampoperation tothe chart
below.

"AIR BAG" warning lampoperation -User mode -

IGN ON

i

ON
J
I

OFF ~~----------------
MRS095A
SRS
condition
No malfunction is
detected. No further actionisnec-
essary. Reference
item

ON
OFF
The
system hasproblem GotoDIAGNOSTIC PRO-
and needs tobe repaired CEDURE2,or 3(RS-33
as indicated. or34).

MRS096A

lGN ON

ON •
OFF
Jr--------------------

MRS097A

IGN ON

ON
OFF --------------------
MRS098A
Air
bag isdeployed. GotoCOLLISION DIAG-
NOSIS (RS-40).
Fuse, diagnosis sensor GotoDIAGNOSTIC PRO-
unit orharness ismal- CEDURE 4(RS-38).
functioning andneeds to
be repaired.
Diagnosis sensorunitor GotoDIAGNOSTIC PRO-
"AIR BAG" warning CEDURE5(RS-38).
lamp circuit isshorted or
open andneeds tobe
repaired.

NOTE:
If "AIR BAG" warning lampoperates differently fromtheoper-
ations shown above, referto"AIR BAG" warning lampopera-
tion -Diagnosis mode-,
DIAGNOSTIC PROCEDURE3,RS-34.
Then repair asnecessary.

RS-32

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)-
Dual AirBag System
Self-diagnosis (Cont'd)
CONSULT DIAGNOSTIC CODECHART

Diagnostic item
Explanation Repair
order
Recheck SRSateach replacement.
NO SELF DIAGNOSTIC
•No malfunction isdetected.

-

FAILURE INDICATED.
AIRBAG MODULE
•Driver's airbag module circuitisopen.

1.
Visually checkthewiring harness connec-
[OPEN) (includingthespiral cable)
tions.
AIRBAG MODULE
•Driver's airbag module circuitisshorted 2.
Replace thespiral cable.
3. Replace driver'sairbag module.
[VB-SHORT] tosome power supply circuit. (including
(Beforedisposing ofit,itmust be
the spiral cable)
deployed.)
AIRBAG MODULE
•Driver's airbag module circuitisshorted 4.
Replace thediagnosis sensorunit.
[GND-SHORT] toground. (including thespiral cable) 5.
Replace theairbag harness.
AIRBAG MODULE
•Driver's airbag module circuitsare
[SHORT] shortedtoeach other.
ASSIST A/BMODULE •Front passenger airbag module circuitis
1.

Visually checkthewiring harness connec-
[OPEN] open. tions.
ASSIST A/BMODULE
•Front passenger airbag module circuitis2.
Replace frontpassenger airbag module.
(Before disposing ofit,itmust be
[VB-SHORT] shortedtosome power supply circuit.
deployed.)
ASSIST A/BMODULE •Front passenger airbag module circuitis3.
Replace thediagnosis sensorunit.
[GND-SHORT) shortedtoground. 4.
Replace theairbag harness.
ASSIST A/BMODULE •Front passenger airbag module circuits
[SHORT] areshorted toeach other.
CONTROL UNIT
•Diagnosis sensorunitisout oforder.
1.
Visually
checkthewiring harness connec-
tions.
2. Replace thediagnosis sensorunit.
3. Replace theairbag harness.
4. Replace themain harness.

*
Follow theprocedures innumerical orderwhenrepairing malfunctioning parts.Confirm whether malfunction iseliminated
using theairbag warning lamp(inuser mode) orCONSULT eachtimerepair isfinished.
If
malfunction isstill observed, pro-
ceed tothe next step. When malfunction iseliminated, furtherrepairworkisnot required.
RS-36

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)
Dual AirBag System
Self-diagnosis
(Cont'd)

WARNING LAMPFLASH CODECHART

Warning Flashcode
@

Explanation Repair
order
lamp (#offlashes)
RecheckSRSateach replacement.

0
Nomalfunction isdetected.
-

2 The
driver's airbag module circuit
1.Visually checkthewiring harness connections.
is out oforder.
2.Replace thespiral cable.

D.
3.
Replace thedriver's airbag module.

E
(Before
disposing ofit,itmust bedeployed.)

(Ij

-
4.Replace thediagnosis sensorunit.

en

c
5.Replace theairbag harness.

c

ca
7
The
diagnosis sensorunitisout of 1.Visually checkthewiring harness connections.

~

order. 2.
Replace thediagnosis sensorunit.

C)

3.Replace theairbag harness.

«

OJ
.

4.Replace themain harness .

cr:

;:(
8
The
front passenger airbag module 1.Visually checkthewiring harness connections.
circuit isout oforder. 2.Replace thefront passenger airbag module.
(Before disposing of
it,it
must bedeployed.)
3. Replace thediagnosis sensorunit.
4. Replace theairbag harness.

* Follow theprocedures innumerical orderwhen repairing malfunctioning parts.Confirm whether malfunction iseliminaled
using theairbag warning lamp(inuser mode) orCONSULT eachtimerepair isfinished. Ifmalfunction isstill observed, pro-
ceed tothe next step. When malfunction iseliminated, furtherrepairworkisnol required.
RS-37
•

TROUBLEDIAGNOSES -Supplemental RestraintSystem(SRS)-
Dual AirBag System
Trouble Diagnoses forAir Bag Warning Lamp
DIAGNOSTIC PROCEDURE 4
SYMPTOM: "AIRBAG" warning lampdoesnotturn off.

{f

UP
SIDE
•

T

AIRBAG

EE3J
Is
air bag module deployed?

No

Is SRS "AirBag" fuse(10A) OK?
Yes Replace
airbag module
and diagnosis sensor
unit. Refer toCOLLISION
DIAGNOSIS, (RS-40).
Replace fuse.

I ~
SELECT SYSTEM
01

I
ENGINE
I

AIRBAG

MRS125A
00

Connect
CONSULT andtouch No
Replace diagnosis sensor
"START".
----....

unit.
• Is "AIRBAG" displayedon
CONSULT?
~Yes
Is harness connection betweenwarning No
Connect warning lamp
lamp anddiagnosis sensorunitOK?
~

anddiagnosis sensorunit
Yes properly.
Ifwarning lamp
still does notgooff,
replace harness.
[RePlace diagnosissensorunit.

DIAGNOSTIC PROCEDURE 5
SYMPTOM: "AIRBAG" warning lampdoesnotturn on.

{f
+

METER

UP
SIDE

EE3J

MRS127A
Is
warning lampfuseOK?
Yes
Is warning lampLEDOK?
Yes
Is harness connection betweenwarning
lamp anddiagnosis sensorunitOK?
Yes

I
Replace diagnosis sensorunit.

RS-38
No
Replace fuse.
Replace warning lamp
LED.
Connect warning lamp
harness properly. Ifwarn-
ing lamp stilldoes not
come on,replace har-
ness.

NoSRSisingood order. Set-
ting theCONSULT tothe
Diagnosis modeisimpos-
sible. Nofurther actionis
necessary.
Is
"AIR BAG" warning lampblinking?

Yes
MRS115A
TROUBLE
DIAGNOSES -Supplemental RestraintSystem(SRS)-
Dual AirBag System
Trouble Diagnoses forAir Bag Warning Lamp

m
(Cont'd)
DIAGNOSTIC PROCEDURE 6
SYMPTOM: SRSdoes notenter Diagnostic mode.

m

NoCharge battery.

SRS058
Disconnect
bothbattery cablesand
check battery voltage usingcircuit
te.ster .
• Is battery voltage morethan9V?
Remove driver'sdoorswitch andcheck
continuity betweendriver'sdoorswitch
connector terminals
G)
and
@
under
the following conditions.
No

Replace driver'sdoor
switch.

Condition
Door switch isdepressed
(Door isclosed).
Door switch isreleased
(Door isopen). Continuity

YES

NO
MRS104
00

Check harness continuity betweendriv-
er's door switch connector terminal
@

and body ground .
• Does continuity exist?

Yes

Replace diagnosis sensorunit.

I
Go 10DIAGNOSTIC PROCEDURE3.No

Replace orrepair har-
ness.

•

SRS060
RS-39

COLLISIONDIAGNOSIS -Dual AirBag System

To repair theSRS, perform thefollowing steps.

When SRSisactivated inacollision:

CD
Replace thediagnosis sensorunit.

@ Remove
theairbag modules.

@
Check theSRS components usingthetable shown below:
• Replace anySRS components showing
visible
signsofdamage (dents,cracks, deformation).

@
Conduct self-diagnosis. Referto"Self-diagnosis" fordetails (RS-32). Ensuretheremainder ofthe
SRS isoperating properly.

Install newairbag modules.

@
Conduct self-diagnosis again.

When SRSisnot activated inacollision:

CD
Check theSRS components usingthetable shown below:
• Replace anySRS components showingvisiblesignsofdamage (dents,cracks, deformation).

@
Conduct self-diagnosis usingCONSULT and"'AIR BAG" warning lamp.Referto"Self-diagnosis" for
details (RS-32). EnsureentireSRSoperates properly.

SRS inspection

Part SRSisactivated
SRSisNOT activated
Air bag module REPLACE
1.Remove airbag module. Checkharness coverandconnectors fordamage,
(driver andpassen-
Installwithnew terminalsfordeformities, andharness forbinding.
ger side) bolts.
2-1.Install driverairbag module intothesteering wheeltocheck fitand align-
ment withthewheel.
2-2. Install passenger airbag module intotheinstrument paneltocheck fit
with theinstrument panel.
3. No damage found,reinstall withnewbolts.
4. Ifdamaged-REPLACE. Airbag must bedeployed beforediscarding.
Instrument panel
REPLACE 1.Check instrument panelforbending, deformities, orcracks.
Install withnew
2.Ifno damage isfound, reinstall withnewbolts.
bolts. 3.Ifdamaged-REPLACE.
Diagnosis sensor REPLACE
1.Check caseandbracket fordents, cracks ordeformities.
unit Installwithnew
2.Check connectors fordamage, andterminals fordeformities.
bolts. 3.Ifno damage isfound, reinstall withnewbolts.
4. Ifdamaged-REPLACE.
Steering wheel
1.Visually checksteering wheelfordeformities.
2. Check harness (builtintosteering wheel)andconnectors fordamage, andterminals fordeformi-
ties.
3. Install airbag module tocheck fitor alignment withsteering wheel.
4. Check steering wheelforexcessive freeplay.
5. Ifno damage isfound, reinstall withnewbolts.
6. Ifdamaged-REPLACE.
Spiral cable
1.Visually checklock(engagement) pinsandcombination switchfordamage.
2. Check connectors, flatcable andprotective tapefordamage.
3. Check steering wheelfornoise, binding orheavy operation.
4. Ifno damage isfound, reinstall withnew bolts.
5. Ifdamaged-REPLACE.
Harness andCon-
1.Check connectors forpoor connection, damage,andterminals fordeformities.
nectors 2.Check harness forbinding, chafing,cuts,ordeformities.
3. Ifno damage isfound, reinstall theharness andconnectors.
4. Damaged-REPLACE damagedsectionofharness. Donot attempt torepair, spliceormodify any
SRS harness.

RS-40