Illustration:
what to do and where
21. CHECK PISTON STROKE OF OVERDRIVE BRAKE
(a)
Task heading : what to do
SST 09350–30020 (09350–06120)
Set part No. Component part No.
Detailed text : how to do task
(b)
Piston stroke: 1.40 1.70 mm (0.0551
Specification
Place SST and a dial indicator onto the overdrive brake pis-
ton as shown in the illustration.
Measure the stroke applying and releasing the compressed
air (392 kgf/cm
2 or 57 114 psi) as shown
in the illustration. IN–2
– INTRODUCTIONHOW TO USE THIS MANUAL
The procedures are presented in a step–by–step format:
The illustration shows what to do and where to do it.
The task heading tells what to do.
The detailed text tells how to perform the task and gives other information such as specifications
and warnings.
Example
This format provides the experienced technician with a FAST TRACK to the information needed. The upper
case task heading can be read at a glance when necessary, and the text below it provides detailed informa-
tion. Important specifications and warnings always stand out in bold type.
6. REFERENCES
References have been kept to a minimum. However, when they are required you are given the page to refer
to.
7. SPECIFICATIONS
Specifications are presented in bold type throughout the text where needed. You never have to leave the
procedure to look up your specifications. They are also found in Service Specifications section for quick ref-
erence.
8. CAUTIONS, NOTICES, HINTS:
CAUTIONS are presented in bold type, and indicate there is a possibility of injury to you or other
people.
NOTICES are also presented in bold type, and indicate the possibility of damage to the components
being repaired.
HINTS are separated from the text but do not appear in bold. They provide additional information to
help you perform the repair efficiently.
9. SI UNIT
The UNITS given in this manual are primarily expressed according to the SI UNIT (International System of
Unit), and alternately expressed in the metric system and in the English System.
Example:
Torque: 30 N·m (310 kgf·cm, 22 ft·lbf)
R11910Match marks
IN–10
– INTRODUCTIONFOR ALL OF VEHICLES
(3) Even in cases of a minor collision where the SRS
does not deploy, the steering wheel pad (See Pub.
No. RM599E, page RS–15), front passenger airbag
assembly (See Pub. No. RM599E, page RS–28),
side airbag assemblies (See page RS–11), curtain
shield airbag assemblies (See page RS–25) and
seat belt pretensioners (See Pub. No. RM599E,
page BO–152) should be inspected.
(4) Never use SRS parts from another vehicle. When
replacing parts, replace them with new parts.
(5) Before repairs, remove the airbag sensor if shocks
are likely to be applied to the sensor during repairs.
(6) Never disassemble and repair the airbag sensor as-
sembly, side airbag sensor assembly, steering
wheel pad, front passenger airbag, side airbag or
seat belt pretensioner in order to reuse them.
(7) If the airbag sensor assembly, side airbag sensor
assembly, steering wheel pad, front passenger air-
bag, side airbag or seat belt pretensioner have
been dropped, or if there are cracks, dents or other
defects in the case, bracket or connector, replace
them with new ones.
(8) Do not directly expose the airbag sensor assembly,
side airbag sensor assembly, steering wheel pad,
front passenger airbag, side airbag or seat belt pre-
tensioner to hot air or flames.
(9) Use a volt/ohmmeter with high impedance (10 kΩ/V
minimum) for troubleshooting of the electrical cir-
cuit.
(10) Information labels are attached to the periphery of
the SRS components. Follow the instructions on the
notices.
(11) After work on the supplemental restraint system is
completed, check the SRS warning light (See Pub.
No. RM599E, page DI–152).
(c) SPIRAL CABLE (in Combination Switch)
The steering wheel must be fitted correctly to the steering
column with the spiral cable at the neutral position, other-
wise cable disconnection and other troubles may result.
Refer to Pub. No. RM599E, page SR–18 of this manual
concerning correct steering wheel installation.
IN–26– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
5. PROBLEM SYMPTOMS TABLE
The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to
troubleshoot the problem when a ”Normal” code is displayed in the diagnostic trouble code check but the
problem is still occurring. Numbers in the table indicate the inspection order in which the circuits or parts
should be checked.
HINT:
When the problem is not detected by the diagnostic system even though the problem symptom is present,
it is considered that the problem is occurring outside the detection range of the diagnostic system, or that
the problem is occurring in a system other than the diagnostic system.
Symptom
Suspect AreaSee page
With the ignition switch in the ACC or ON position, the SRS warning
light sometimes lights up after approx. 6 seconds have elapsed.
SRS warning light is always lit up even when ignition switch is in
the LOCK position
With the ignition switch in the ACC or ON position, the SRS warning
light does not light up.
PROBLEM SYMPTOMS TABLE
DTC is not displayed.
SRS warning light is always lit up at the time of DTC check
procedure.
DTC is displayed without Tc and E1 terminal connection.DI–294 DI–290
Problem Symptom
Proceed with troubleshooting of each circuit in the table below.
SRS warning light circuit
(Always lights up when ignition switch is in
LOCK position.)
SRS warning light circuit
(Dose not light up when ignition switch is turned to
ACC or ON.)
Tc terminal circuit
DI–288
Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for each problem
symptom. Check in the order indicated by the numbers. Page
Indicates the page where the flow chart for each circuit
is located.
Circuit or Part Name
Indicates the circuit or part which needs to be checked.
PP12J–02
– PREPARATIONBODY ELECTRICAL
PP–19
BODY ELECTRICAL
EQUIPMENT
Voltmeter
Ammeter
Ohmmeter
Test lead
SyphonBrake fluid level warning switch
Bulb (3.4 W)Fuel sender gauge,
Dry cell batteryFuel sender gauge
DI694–01
DI–4
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.).
DTC No.
(See Page)Detection ItemTrouble AreaSRS
Warning Light
81
(DI–8)Short in curtain shield airbag (RH) cir-
cuit (to ground)Curtain shield airbag (RH) (squib)
Airbag sensor assembly
Wire harness
Blink
82
(DI–12)Short in curtain shield airbag (RH) cir-
cuit circuit (to B+)Curtain shield airbag (RH) (squib)
Airbag sensor assembly
Wire harness
Blink
83
(DI–15)Short in curtain shield airbag (RH) squib
circuitCurtain shield airbag (RH) (squib)
Airbag sensor assembly
Wire harness
Blink
84
(DI–18)Open in curtain shield airbag (RH) squib
circuitCurtain shield airbag (RH) (squib)
Airbag sensor assembly
Wire harness
Blink
85
(DI–21)Short in curtain shield airbag (LH) circuit
(to ground)Curtain shield airbag (LH) (squib)
Airbag sensor assembly
Wire harness
Blink
86
(DI–25)Short in curtain shield airbag (LH) circuit
circuit (to B+)Curtain shield airbag (LH) (squib)
Airbag sensor assembly
Wire harness
Blink
87
(DI–28)Short in curtain shield airbag (LH) squib
circuitCurtain shield airbag (LH) (squib)
Airbag sensor assembly
Wire harness
Blink
88
(DI–31)Open in curtain shield airbag (LH) squib
circuitCurtain shield airbag (LH) (squib)
Airbag sensor assembly
Wire harness
Blink
HINT:
When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops.
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, the SRS warning light will automatically go out.
When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.
If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.
DI695–01
H11591
Combination Meter
(Warning Light)Steering Wheel Pad
(with Airbag)
Airbag Sensor Assembly Front Passenger
Airbag Assembly
Side Airbag Assembly
(LH)
Seat Belt
Pretensioner (LH)Side Airbag Assembly (RH)
Seat Belt
Pretensioner (RH)
Front Airbag
Sensor (LH)
Front Airbag Sensor (RH)
Side and Curtain Shield
Airbag Sensor (RH) Side and Curtain Shield
Airbag Sensor (LH)Curtain Shield Airbag
Assembly (LH)Curtain Shield Airbag Assembly (RH)
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–5
PARTS LOCATION
DI696–01
H01357
C6C5C4
A B
1 2 3 4 5 6A BA B
7 8 9 10 11 121 2 3 4 5 6
7 8 9 10 11 12 1 2 3 4 5 6
7 8 9 10 11 12
23 24 25 26 27 2813 14 15 16 17
18 19 20 21 22 DI–6
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
TERMINALS OF ECU
No.SymbolTerminal Name
A–Electrical Connector Check Mechanism
B–Electrical Connector Check Mechanism
C4 – 1SFL–Squib (Side, LH)
C4 – 2SFL+Squib (Side, LH)
C4 – 5PL+Squib (Seat Belt Pretensioner, LH)
C4 – 6PL–Squib (Seat Belt Pretensioner, LH)
C4 – 7ESLSide Airbag Sensor (LH)
C4 – 9FSLSide Airbag Sensor (LH)
C4 – 10SSL+Side Airbag Sensor (LH)
C4 – 12VUPLSide Airbag Sensor (LH)
C5 – 3LASRS Warning Light
C5 – 5IG2Power Source (IGN Fuse)
C5 – 6ACCPower Source (CIG Fuse)
C5 – 7ICL+Squib (Curtain Shield Airbag, LH)
C5 – 8ICL–Squib (Curtain Shield Airbag, LH)
C5 – 9SR+Front Airbag Sensor (RH)
C5 – 10P+Squib (Passenger)
C5 – 11P–Squib (Passenger)
C5 – 12SILDiagnosis
C5 – 13D–Squib (Driver)
C5 – 14D+Squib (Driver)
C5 – 15SL+Front Airbag Sensor (LH)
C5 – 16ICR–Squib (Curtain Shield Airbag, RH)
C5 – 17ICR+Squib (Curtain Shield Airbag, RH)
C5 – 19TcDiagnosis
RS0IJ–01
– SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS–1
SRS AIRBAG
PRECAUTION
NOTICE:
The AVENSIS / CORONA is equipped with SRS, which comprises a driver airbag, front passen-
ger airbag, side airbag and curtain shield airbag. Failure to carry out service operations in the
correct sequence could cause the SRS to unexpectedly deploy during servicing, possibly lead-
ing to a serious accident. Further, if a mistake is made in servicing the SRS, it is possible that
the SRS may fail to operate when required. Before performing servicing (including removal or
installation of parts, inspection or replacement), be sure to read the following items carefully,
then follow the correct procedures described in the repair manual.
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.
Even in cases of a minor collision where the SRS does not deploy, the side airbag assembly,
curtain shileld airbag assembly and side and curtain shield airbag sensor assembly should be
inspected (See page RS–11, RS–25 and RS–36).
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the side airbag assembly, curtain shield airbag assembly or side
and curtain shield airbag sensor assembly in order to reuse it.
If the side airbag assembly, curtain shield airbag assembly or side and curtain shield airbag
sensor assembly has been dropped, or if there are cracks, dents or other defects in the case,
bracket or connector, replace it with new one.
Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s
electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.
After working on the SRS is completed, perform the SRS warning light check (See Pub No.
RM599E on page DI–152).
If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
CAUTION:
Work must be started 90 seconds after the ignition switch is turned to the ”LOCK” position and
the negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds
from disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)
When the negative (–) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back– up power supply from outside the vehicle.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.
Do not expose the side airbag assembly, curtain shield airbag assembly or side and curtain
shield airbag sensor assembly directly to hot air or flames.