light MITSUBISHI SPYDER 1990 Service Repair Manual

SRS General
CONSTRUCTION DIAGRAM
VEHICLE IDENTIFI-CATION CODE
CHART PLATE
Air
module
SRS warning light
SRS-ECU(incorporated safing sensor
and analog sensor)
NOTEThis construction diagram displays the general view of the SRS components.
For details, refer to “Schematic” “Configuration Diagrams” and “Circuit Diagram”
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SRS General- Jnformation
Label
A WARNING TO AVOID SERIOUS INJURY:DANGER POISON
For maximum safety protection in all types ofKeep out of the reach of children. Contains sodium
crashes, you must always wear your safety belt. azide and potassium nitrate contents are poisonous
Do not install rearward-facing child seats in any f
rontand extremely flammable. Contact with acid, water,
passenger seat position. or heavy metals may produce harmful and irritating
Do not sit or lean unnecessarily
close to the air bag. gasesor explosive compounds. Do not dismantle,
Do not place any objects over the air bag or betwee
nincinerate, bring into contact with electricity or store
the air bag and yourself. at temperatures exceeding
See the owner’s manual for further information andFIRST AID: If contents are swallowed induce
explanations.vomiting. For eye contact flush eye for 5
minutes. If gases from acid
inhaled, seek fresh air. In every case, get prompt
medical attention.
For additional information, see material safety dat a
sheet (MSDS) for this product.
CAUTION: SRS clock spring
This is not a repairable part. Do not disassemble o r
tamper. If defective, replace entire unit per servi ce
manual instructions. To re-center: Rotate
until tight. Then rotate in opposite direction
approximately 3 turns and align
3Driver’s air bag informationCAUTION: SRS
This vehicle has an air bag which will supplementBefore removal of steering gear box, read service
the
in certain frontal collisions. The air bagmanual, center front wheels and remove ignition
is not a substitute for the
in any type ofkey.
collision. The driver, and all other occupants, sho uldFailure to do so may damage SRS clock spring and
wear at all times.render SRS system inoperative, risking serious
WARNING!driver injury.
If the warning light does not illuminate for
several seconds when ignition key is turned to
or the engine is started, or if the warning light stays
on while driving, take the vehicle to your nearest
authorized dealer immediately. Also if the vehicle’ s
front end is damaged or if the air bag has deployed .
Take the vehicle for service immediately.WARNING: SRS
The air bag system must be inspected by an This air bag module cannot be repaired. ‘Do not
authorized dealer ten years after the vehicledisassemble or tamper.
manufacture date shown on the certification labelDo not perform diagnosis. Do not touch with
located on the left front door-latch post or door
electrical test equipment or probes.
frame.Refer to service manual for further instructions, a nd
Read the section of your owner’s manualfor special handling.
before driving, for important information, about Storage and disposal procedures. Tampering or
operation, and service of the air bag system. mishandling can result in
When you are going to discard your gas generatorDANGER POISON
or vehicle, please see your MITSUBISHI dealer. Keep out of the reach of children.
Contains sodium azide and potassium nitrate
CAUTION:contents are poisonous and extremely flammable.
Do not disassemble or drop. If defective, refer toContact with acid, water or heavy metals may
service manual.produce harmful and irritating gases or explosive
compounds. Do not dismantle. Incinerate, bring into
CAUTION: SRScontact with electricity or store at temperatures
exceeding
Before replacing steering wheel, read service
manual, center front wheels and align SRS clockIf contents are swallowed induce vomiting. For eye
spring neutral marks. Failure to do so may render contact flush eye with water for 15 minutes. If gases
SRS system inoperative, risking serious driverfrom acid or water contact are inhaled, seek freshinjury.air. In every case, get prompt medical attention.
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SRS General Information
SCHEMATIC
IGNITION SWITCH
Combination meter warning light) Connector lock switch
Connector coupled: LOCK
Connector uncoupled: UNLOCK
II
AnalogWarning
3 sensor light drive
circuit
Microprocessor
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Clock
spring
I air Passenger’s air bag
drive circuit
I
Air bag module (Driver’s side) Scan tool
interface
circuit
Data link connector
Air bag module (For scan tool)
(Front-passenger’s
side)

SRS General Information
CONFIGURATION DIAGRAMS
D a s h p a n e l
Ignition switch
Air bag module (front passenger’s side)
Data link connector (For scan tool)Data link connector (For scan tool)
Instrument panel
Clock spring
Air bag module (driver’s side)
-18
Combination meter (For warning light)
Combination meter (For SRS warning light)
C-i 8 air bag control unit
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SRS General Information.
CIRCUIT DIAGRAM
CAUTION
1.Do not repair, splice or modify SRS wiring (except for specific repairs to the body harness
shown on page
replace wiring if necessary, after reading and fol lowing all precautions
and procedures in this manual.
2.Do not use an analog ohmmeter to check wiring or components; use only special tools
(refer to
and digital multi-meter (refer to
IGNITION
23
I
25
13
CONDITIONING AUTO-CRUISECONTROL SYSTEM CHARGING SYSTEM . COOLING SYSTEM
. IGNIT. METER. MFI
ELC AUTOMATIC TRANSAXLE ION SYSTEMAND GAUGES
14
COMBINATIONMETER
. AUTO-CRUISECONTROL SYSTEM SEAT BELTWARNING BUZZER WINDOWDEFOGGER
C. C.POWER SOURCE CIRCUITCONVERTERWATCH-DOG CIRUIT WARNING LIGHT,
DRIVE CIRCUIT ANALOG SENSOR
I IIIBACK-UP
CAPACITORMICROPROCESSORI
AIR BAG DRIVE CIRCUIT
SAG DRIVE CIRCUIT IIIAA
5 6 8
7
2CLOCKSPRINGI
BR2 21
R e m a r k s
n e .AIR BAG AIR BAG MODULE (DRIVER'S SIDE) (PASSENGER'S SIDE)
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SRS Service Precautions
SERVICE PRECAUTIONS52400020092
1. In order to avoid injury to yourself or others
from accidental deployment of the air bag during
servicing, read and carefully follow all the
cautions and procedures described in this
manual.
2. Do not use any electrical test equipment on
or near SRS components, except those
fiedon and
Never use an analog ohmmeter.
3.Never Attempt to Repair the Following
ponents:
SRS Air Bag Control Unit (SRS-ECU)
Clock Spring
Air Bag Module If any of these components are diagnosed as
faulty, they should only be replaced, in
dance with the COMPONENT SERVICE
dures in this manual, starting at page
4. Do not attempt repair the wiring harness
connectors of the SRS. any of the connectors
are diagnosed as faulty, replace the
harness. If the wires are diagnosed asfaulty,
replace or repair the wiring harness according
to the following
SRS-ECU HarnessDestination of HarnessCorrective A c t i o n
TerminalConnector
No.(No. of
Terminals,
Color)
121 pins,
yellows5Body wiring harness Clock splingCorrector replace
Air bag module (Driver’s side)bodywiring harness
6Replace clock
7Body wiring harness Air bag module (Front passenger’s side)Corrector replace
body
8
9, 10
11Body wiring harness Data link connectorCorrect or
body harness
12
13
14
15
Body wiring harness Junction block (fuse
Body wiring harness Junction block (fuse
Body wiring harness Instrument panel wiring harness
SRS warning light .
or
replace. harness
16 to 19 ,
20
21
Body wiring harness GroundCorrect or replace
body harness
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SRS Service Precautions/Service Specifications
5.
6.
7.
a.
9.
SW-ECU
Tobody wiring
After disconnecting the battery cable, wait 60 seco nds or more before proceeding with the
following work. The SRS system is designed to retai n enough voltage to deploy the air bags
for a short time even after the battery has been di sconnected, so serious injury may result
from unintended air bag deployment if work is done on the SRS system immediately after
the battery cables are disconnected. SRS components should not be subjected to heat over
so remove the SRS-ECU,
air bag module and clock spring before drying or ba king the vehicle after painting.
Whenever you finish servicing the SRS, check the SR S warning light operation to make sure that
the system functions properly. (Refer to
Make certain that the ignition switch is OFF when t he scan tool is connected or disconnected.
If you have any questions about the SRS, please con tact the MMSA Tech. Line.
NOTE
SERIOUS INJURY CAN RESULT FROM UNINTENDED AIR BAG D EPLOYMENT, SO USE ONLY
THE PROCEDURES AND EQUIPMENT SPECIFIED IN THIS MANU AL.
SERVICE SPECIFICATIONS52400040057
ItemsStandard value
Clock spring resistance less than 0.4
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SRS
INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES
Code No.Diagnostic item
14Analog sensor system
Safing sensor system
Driver’s air bag module (squib) system
62
64, Front passenger’s air bag module (squib) system
65
SRS-ECU capacitor system
Connector lock system
35SRS-ECU (after deployment of the air bag) system
(A) power circuit system
(B) power circuit system
43SRS warning light circuit system Light does not illuminate
Light does off
44SRS light drive circuit system
45SRS-ECU non-volatile memory and A/D converter system’
Driver’s air bag module (squib ignition drive circuit) system
Front passenger’s air bag module (squib ignition dr ive circuit) system
NOTE
For diagnostic trouble codes marked with if the vehicle condition to normal,, the diagnostic
code will be automatically erased, and the SRS warn ing light will return to normal.
If the vehicle has a discharged battery it will store the diagnostic trouble codes 41 or 42. When thes e diagnostic
trouble codes are displayed, check the battery.
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SRS Troubleshooting
Code No. 31 or 32 SRS-ECU capacitor systemProbable cause
[Comment]l Malfunction of These diagnostic trouble codes are output if the vo ltage at the SRS-ECU capacitor
terminals is higher (No. 31) or lower (No. 32) than the value for 5 seconds
or more.
However, if diagnostic trouble code Nos. 41 and 42 are being output due to a drop
in battery voltage, code No. 32 will not be detecte d.
Insulating tape
Caution
Turn the ignition key to the “LOCK” position, disco nnect
the negative battery cable and tape the terminal.
Wait at least 60 seconds after disconnecting the ba ttery
cable before doing any further work. (Refer to
Battery cable
Replace the SRS-ECU.
Code No. 34 Connector lock system Probable cause
[Comment]l Malfunction of connectors
This diagnostic trouble code is output when the SRS -ECU connector is connectedl
Malfunction of SRS-ECU
improperly.However, if the vehicle condition returns to normal , diagnostic trouble code No. 34
will be automatically erased, and the SRS light will switch off.
insulating tape
Battery cable
Caution
Turn the ignition key to the “LOCK” position, disco nnect
the negative battery cable and tape the terminal.
Wait at least 60 seconds after disconnecting the ba ttery
cable before doing any further work. (Refer to P.
Check trouble symptom.
OKNG
Repair
Replace the SRS-ECU.
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Troubleshooting
Code No. 41 (A) power circuit systemP r o b a b l e
[Comment]l Malfunction of harnesses or connectors
This diagnostic trouble code is output if the volta ge between the (A) terminall
Malfunction of SRS-ECU,
and the ground is lower than the specified value fo r a continuous period of 5 secondsor more.
However, if the vehicle condition returns to normal , diagnostic trouble code No. 41
will be automatically erased, and the
light will switch off., .
Insulating tape
cable
I
Caution
Turn the ignition key to the “LOCK” position,
. the negative battery cable and tape terminal.
Wait at least 60 seconds after
battery
cable before doing any further work. (Refer P.
SRS check harness
OK
Measure at check harnessconnector (5).l Disconnect SRS-ECU connector
l Connect SRS check harness
connector (3).
lContinuity between terminals (20)
OK: Continuity
C h e c k t h efollowing
Check trouble symptom. .
N G
l Disconnect SRS-ECU connector l Connect check harness connector (3)
l Ignition switch: ON
l Voltage between terminal (14) and ground
OK: 9
or more
OK
Replace the SRS-ECU.
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