Toyota Supports ASE CertificationPage 1 of 1
ST002±98Title:
STEERING GEAR REMOVAL/
REPLACEMENT
Models:
All Models equipped with SRS Airbag
Technical Service
BULLETIN
May 22, 1998
The following information is provided to supplement the Repair Manual procedure
for
removing/installing the steering gearbox or rack and pinion on vehicles equipped with a
driver 's side Supplemental Restraint System (SRS) Airbag.
CAUTION:
When the intermediate shaft is disconnected and the steering wheel is turned freely,
the SRS spiral cable may be broken.
Therefore, as a precaution, make sure to pass
the driver's seat belt through the steering wheel to prevent it from turning freely, as
shown below.
After working on SRS/Steering components, always check the operation of the SRS
Warning Light. Refer to the appropriate repair manual if any diagnostic trouble codes
are recorded.
Tercel, Paseo, Corolla, MR2, Celica, Camry, Avalon, Supra, Previa, Sienna, RAV4,
4Runner, Tacoma, T±100 & Land Cruiser equipped with a driver's side SRS Airbag.
1. Position the front wheels facing
straight ahead.
2. Using the driver's seat belt, set the
steering wheel so that it does not turn
(see Fig. 1).
3. Paint match marks on the
intermediate shaft and control valve
shaft (see Fig. 2).
4. Remove the intermediate shaft
retaining bolt and disconnect the
intermediate shaft (see Fig. 2).
OP CODEDESCRIPTIONTIMEOPNT1T2
N/ANot Applicable to Warranty ±±±±
STEERING
Introduction
Affected
Vehicles
Fig. 1
Repair
Procedure
Match Marks
Fig.2
Warranty
Information
Toyota Supports ASE CertificationPage 1 of 2
AC003-04Title:
A/C COMPRESSOR INSTALLATION
PROCEDURE
Models:
Applicable Models
Technical Service
BULLETIN
March 1, 2004
Use the following tip when installing an A/C compressor on the AZ or ZZ series engine
to ensure proper belt alignment. Improper installation of the A/C compressor may result
in abnormal belt noise or wear.
1998 ± Current model year Corolla vehicles.
2000 ± Current model year Celica vehicles.
2000 ± Current model year MR2 Spyder vehicles.
2001 ± Current model year Highlander vehicles equipped with 4 cylinder engine.
2001 ± Current model year RAV4 vehicles.
2002 ± Current model year Camry vehicles equipped with 4 cylinder engine.
2002 ± Current model year Solara vehicles equipped with 4 cylinder engine.
2003 ± Current model year Matrix vehicles.
OP CODEDESCRIPTIONTIMEOFPT1T2
N/ANot Applicable to Warranty±±±±
Belt
Bolt
Clearance
A/C CompressorOKNG
Proper Installation Improper Installation
HEATING & AIR CONDITIONING
Introduction
Applicable
Vehicles
Warranty
Information
Installation
Procedure
B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
Theft Deterrent and Door Lock Control
J POWER SOURCE (Current Flow Chart)
11
1
EA1 1EA2 3
7
EB16
E 6
E 7I 2I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
W W
B B B B BW±B
B
B
B B±O
B±W
W±B
B±W STARTER RELAY INJECTION RELAY15A HAZ±RADIO7.5A AM250A MAIN 1.25B FL MAIN
BATTERY
WWW
W W W
R W±L
W
W
G±W
G
15A TAIL
20A DEFOG
15A RAD CIGTA I L
RELAY 7.5A DOME 40A DOOR LOCK CB
2 1
1 2
4 8
2 3
3 4
G
W±R
P±L B±Y
B±Y
W±R
AM2 IG2
ACC
IG1AM1W W
W±R
W W
W±B
21
1
1
1
1
2
2
2
2
3
4
3
4 1
2
1
22
1
11
1
IGNITION SW I 8
Battery
30A AM2
2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning STOP
Fuse Page
194
214
11 2
System
DOME 20A
10ACombination Meter
Headlight
Interior Light
2
2
6 100A ALT
EB1
POWER SOURCE
Light Auto Turn Off187
180
166
210
230
122
10A ECU±B
5 60A ABS
2
6 Fusible Link Block2
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.
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.
Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº 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 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.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
Do not expose the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor
assembly or front airbag sensor assembly directly to hot air or flames.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, seat belt pretensioner, center airbag sensor assembly and front airbag sensor assembly should be inspected.
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center
airbag sensor assembly or front airbag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor assembly or
front airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket or
connector, replace them with new ones.
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.
If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
SRS
The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.
When the ignition SW is turned to ACC or ON, current from the CIG fuse flows to TERMINAL (B) 6 of the center airbag
sensor assembly. Only when the ignition SW is on does the current flow from the IGN fuse to TERMINAL (B) 5 of the center
airbag sensor assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, current from the CIG or IGN fuse flows to
TERMINALS (B) 14, (B) 10, (A) 2 and (C) 5 of the center airbag sensor assembly to TERMINAL 1 of the airbag squibs and
the pretensioners to TERMINAL 2 to TERMINALS (B) 13, (B) 11, (A) 1 and (C) 6 of the center airbag sensor assembly to
TERMINAL (B) 27, (B) 28 or BODY GROUND to GROUND, so that current flows to the front airbag squibs and the
pretensioners and causes them to operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
The airbag stored inside the passenger's instrument panel is instantaneously expanded to soften the shock to the front
passenger.
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A928C1130J7B31
A1028D128J831
A1630D230J931
A1730D330J2031
C4A30E730P1333
C5B30J231P1433
C6C30J6A31
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1G22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1N22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1V22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1W
2J24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA136Cowl Wire and Cowl Wire (Left Kick Panel)
IE236Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
IG138Engine Wire and Cowl Wire (Under the Blower Motor)IG338Engine Wire and Cowl Wire (Under the Blower Motor)
II138Engine Room Main Wire and Cowl Wire (Cowl Side Panel RH)
: GROUND POINTS
CodeSee PageGround Points Location
EC34Intake Manifold
ID36Cowl Side Panel LH
IF36Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I138Cowl Wire
SYSTEM OUTLINE
KEY REMINDER AND SEAT BELT WARNING
2 1
12J 12 1D2
1T 3
1M 51S71S4
1J 71M 3DD
1W 1
IFBK
R±W
R L±B W± B
R±G W±B
R±L R±LFROM POWER SOURCE SYSTEM (
SEE PAGE 44)
10A
GAU GE7. 5A
DOME
SEAT BELT
WARNING LIGHT
[COMB. METER]JUNCTION
CONNECTOR
UNLOCK
WARNING SW
DOOR COURTESY
SW FRONT LH J 3
U 1
D 7
A
JUNCTION
CONNECTOR J34 A
JUNCTION
CONNECTOR J 9971
8 6 5 10C 7
A 4
BUZZER C C10 A , C12
2 1
R±Y W±B
BUCKLE
SW LH B 5 25A
DOOR
1D 1
B C
A A
A 13
J31
JUNCTION
CONNECTORB A, J32L±W L±W
I12
INTEGRATION RELAYA
Current always flows to TERMINAL 1 of the integration relay through the DOME fuse.
1. SEAT BELT WARNING SYSTEM
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 7 of the integration relay. At the same
time, current flows to TERMINAL 9 of the relay from the GAUGE fuse through the seat belt warning light. This current
activates the relay and the current flowing through the warning light flows from TERMINAL 9 of the relay to TERMINAL 10 to
GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL 8 of the relay to TERMINAL 10
to GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL 8 of the relay, the current
flowing to TERMINAL 1 of the relay flows from TERMINAL 10 to GROUND and the seat belt warning buzzer sounds for
approx. 6 seconds. However, if the seat belt is put on during this period (While the buzzer is sounding), signal input to
TERMINAL 8 of the relay stops and the current flow from TERMINAL 1 of the relay to TERMINAL 10 to GROUND is cut,
causing the buzzer to stop.
2. KEY REMINDER SYSTEM
With the ignition key inserted in the key cylinder (Unlock warning SW on), the ignition SW still off and driver's door open
(Door courtesy SW on), when a signal is input to TERMINAL 6 of the integration relay, the relay operates, current flows from
TERMINAL 1 of the relay to TERMINAL 10 to GROUND and key reminder buzzer sounds.
B5 BUCKLE SW LH
1±2 : Closed with driver's seat belt in use
D7 DOOR COURTESY SW FRONT LH
1±GROUND : Closed with front LH door open
U1 UNLOCK WARNING SW
1±2 : Closed with ignition key in cylinder
I12 (A) INTEGRATION RELAY
10±GROUND : Always continuity
6±GROUND : Continuity with the front LH door open
5±GROUND : Continuity with the ignition key in cylinder
8±GROUND : Continuity with the driver's seat belt in use
1±GROUND : Always approx. 12 volts
(A)13±GROUND : Always approx. 12 volts
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B532I12A30J32B31
C10A30J331J3432
C12C30J931U131
D732J31A31
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1D22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1M22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1S22Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1T22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1W22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2J24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
IF36Instrument Panel Brace LH
BK40Under the Left Center Pillar
SYSTEM OUTLINE
SERVICE HINTS
5A
STARTER FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1J 3
IH1 5IC2 5 IE2 5IF117 IE23
IJ2 3B 2
B 5C10 A4C4C11 A3B7A12
EBB C
A B
IE1 6
11
IE1 7
2 1
IF
B±W Y±B Y±B
O O
R±W
R±L
P±L
Y±G P±L P±L W±B
Y±G
R±W R±W R±W
R±W W±B
B±W
PARK/NEUTRAL
POSITION SW P 1
OIL PRESSURE
SW O 1
WASHER LEVEL
WARNING SW W 1
JUNCTION
CONNECTOR J 1
BRAKE FLUID
LEVEL WARNING SW B 1
JUNCTION
CONNECTOR J 9
G±O
B
5
B 6
2B B
B
OI L
CRUISE
SEAT BELT
ABS
WASHER LEVEL
REAR LIGHTS
BRAKE
BULB
CHECK
RELAY
O/ D OFF
JUNCTION
CONNECTOR J22
P
N
A
TO CRUISE
CONTROL ECU
TO I NTEGRATION
RELAY
TO ABS ECU
TO LI GHT
FAI LURE
SENSOR
B±O
TO O/ D
MAIN SW
J 6
JUNCTION
CONNECTORB A, J 7
C10
COMBINATION METERB A, C11 C, C12
GR
IG211
IG210 B±W
GRGR
1
R±W
PARKING
BRAKE SW P 3