Toyota Corolla Repair Manual: Precaution
Caution
:
Notice
:
- malfunction symptoms of the srs are difficult to confirm, so the dtcs
become the most important
source of information when troubleshooting. When troubleshooting the srs,
always inspect
the dtcs before disconnecting the battery.
- Even in cases of a minor collision where the srs does not deploy, the
horn button assy, instrument panel passenger airbag assy, airbag sensor assy
center, airbag front sensor, front seat airbag assy, side airbag sensor assy
and seat position airbag sensor should be inspected .
- Before repairs, remove the airbag sensor if shocks are likely to be
applied to the sensor during
repairs.
- Never use srs parts from another vehicle. When replacing parts,
replace them with new parts.
- Never disassemble and repair the horn button assy, instrument panel
passenger airbag assy,
airbag sensor assy center, airbag front sensor, front seat airbag assy, side
airbag sensor assy
or seat position airbag sensor in order to reuse it.
- If the horn button assy, instrument panel passenger airbag assy,
airbag sensor assy center, airbag
front sensor, front seat airbag assy, side airbag sensor assy, seat position
airbag sensor
has been dropped, or if there are cracks, dents or other defects in the
case, bracket or connector,
replace it with a new one.
- Use a volt/ohmmeter with high impedance (10 kw/v minimum) for
troubleshooting the system’s
electrical circuits.
- Information labels are attached to the periphery of the srs
components. Follow the instructions
on the notices.
- After work on the srs is completed, perform the srs warning light
check .
- 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 memorized
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.
- If the vehicle is equipped with a mobile communication system, refer
to the precaution in the
introduction section.
1. Srs connectors
- All connectors in the srs are colored in yellow to distinguish
them from other connectors. Connectors having
special functions and specifically designed for the srs
are used in the locations shown on the previous page to
ensure high reliability. These connectors use durable
gold–plated terminals.
- Terminal twin–lock mechanism:
each connector has a two–piece component consisting
of a housing and a spacer. This design enables
the terminal to be locked securely by two locking
devices (the retainer and the lance) to prevent
terminals from coming out.
- Airbag activation prevention mechanism:
each connector contains a short spring plate. When
the connector is disconnected, the short spring
plate automatically connects positive (+) terminal
and negative (–) terminal of the squib.
Hint
:
the type of connector is shown in the diagram on the previous
page.
- Electrical connection check mechanism:
this mechanism electrically checks that connectors
are connected correctly and completely. The electrical
connection check mechanism is designed so
that the disconnection detection pin connects with
the diagnosis terminals when the connector housing
lock is locked.
Hint
:
the connectors shown in this illustration are connectors, ”1”,
”2”, ”3” and ”4” in step 1.
- Half connection prevention mechanism:
if the connector is not completely connected, the
connector is disconnected due to the spring operation
to the extent that no continuity exists.
- Connector lock mechanism:
locking the connector lock button securely connects
the connector.
- When the vehicle is involved in a frontal collision in the
hatched area (fig. 1) And the shock is larger than the predetermined
level, the srs is activated automatically. A
safing sensor is designed to go on at a smaller deceleration
rate than the airbag sensor. As illustrated in fig. 2,
Ignition is caused when current flows to the squib, which
happens when a safing sensor and the deceleration sensor
go on simultaneously. When a deceleration force acts
on the sensors, 2 squibs in the driver airbag and front passenger
airbag ignite and generate gas. The gas discharging
into the driver airbag and front passenger airbag rapidly
increases the pressure inside the bags, breaking
open the horn button assy and instrument panel. Bag
inflation then ends, and the bags deflate as the gas is discharged
through discharge holes at the bag’s rear or side.
2. Disconnection of connector front seat airbag assy
- Place a finger on the slider.
- slide the slider to release lock.
- disconnect the connector.
3. Connection of connector for front seat airbag assy
- align a lock part of male connector and a slider of female
connector in the same direction as shown
in the illustration, fit in them without rubbing.
- be sure to insert until they are locked. After fitting in, pull
them slightly to check that they are locked.
(When locked, make sure that the outer returns to its original position and
sound at the time of fitting
in can be heard.)
Hint
:
- as the slider slides, do not touch it.
- Be careful not to deform the release board. If the release board is
deformed, replace it with a new one.
4. Disconnection of airbag front sensor and side airbag sensor
- while holding both flank sides of the outer, slide the outer
in the direction shown by an arrow.
- release the lock of the connectors, then disconnect the
connectors.
Hint
:
be sure to hold both flank sides of the outer. If holding the top
and bottom sides, it will obstruct disconnection.
5. Connection of connectors for airbag front sensor and side airbag sensor
- align the male connector (on the side of sensor) with female
connector in the same direction as shown
in the illustration and fit them in without rubbing.
- as they are fitted in, the outer slides rearward. Press it until
the outer returns to its original position
again.
If fitting stops half way, connectors will separate.
- be sure to insert until they are locked. After fitting in, pull
them slightly to check that they are locked.
(When locked, make sure that the outer returns to its original position and
sound at the time of fitting
in can be heard.)
Hint
:
- do not fit in while holding the outer.
- When fitting in, the outer slides. Do not touch it.
1. Horn button assy (vehicles not involved in
collision)
Check the diagnostic system .
visually check the following item with the horn button assy
(with airbag) installed in the vehicle.
...
Other materials:
Precaution
1. Check that the battery cables are connected to the correct terminals.
2. Disconnect the battery cables when the battery is given a quick charge.
3. Do not perform tests with a high voltage insulation resistance tester.
4. Never disconnect the battery while the engine is running.
5. Check that ...
Drive shaft / propeller shaft
Preparation
Sst
Recomended tools
Equipment
Lubricant
...
Radiator assy
Replacement
1. Drain coolant
2. Separate radiator hose inlet
3. Separate radiator hose outlet
4. Separate oil cooler inlet tube no.1
5. Separate oil cooler outlet tube no.1
6. Remove radiator assy
disconnect the fan motor connector.
disconnect two clamps for wire–harness from ...