heater LEXUS LS430 2003 Factory Service Manual

Fig. 99: Identifying Rear Cushion Heater RH Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
p.INSPECT REAR SEATBACK HEATER ASSY RH
a. Measure the resistance between the terminals of the rear seatback heater RH.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the rear seatback heater assy RH.
Fig. 100: Identifying Rear Seatback Heater RH Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Tester ConnectionConditionSpecified Condition
A2 - A420°C (68°F)5.4 to 6.6 ohms
S61-4 - A220°C (68°F)5.4 to 6.6 ohms
S61-2 - A420°C (68°F)5.4 to 6.6 ohms
S61-1 - A1AlwaysBelow 1 ohms
S61-3 - A3AlwaysBelow 1 ohms

psi), and check that the pressure does not drop.
If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found,
check the heater core, cylinder block and head.
2.CHECK ENGINE COOLANT LEVEL AT RESERVOIR
a. Check that the engine coolant level is between the LOW and FULL lines when the engine is cold.
If the engine coolant is low, check for leaks and add "TOYOTA Super Long Life Coolant" to the
FULL line.
If "TOYOTA Super Long Life Coolant" is not available, use a similar high quality ethylene glycol
based non-silicate, non-amino, non-nitrite and non-borate coolant with long-life hybrid organic acid
technology. Do not substitute plain water for engine coolant.
3.CHECK ENGINE COOLANT QUALITY
a. Remove the radiator cap.
b. Check if there are any excessive deposits of rust or scale around the radiator cap and radiator filler
hole, Also, the coolant should be free from oil.
HINT:
If excessively dirty, clean the coolant passage and replace the coolant.
c. Reinstall the radiator cap.
INSPECTION
1. INSPECT THERMOSTAT
HINT:
The thermostat is stamped with the valve openin
g temperature.

recommended.
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55004800560056004c0051004a00030057004b00480003004c[nlet and outlet radiator hoses
several times by hand. If the coolant level drops, add coolant.
Fig. 13: Adding Engine Coolant

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Slowly pour coolant into the radiator reservoir until it reaches the FULL line.
c. Install the radiator caps to the radiator and radiator reservoir.
d. Bleed the cooling system.
Start the engine, and open the heater water valve.
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470003005a00440055005000030058005300030057004b0048[ engine.
e. Stop the engine, and wait until the engine coolant cools down.
f. Add coolant to the FULL line for the radiator and reservoir.

Fig. 2: Defogger System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Communication Table
COMMUNICATION TABLE
1.GENERAL
The rear window defogger system's thin heater wires are attached to the inside of the rear window and
defog the window surface quickly. The indicator lamp illuminates while the system is operating. The
system automatically turns off after approximately 15 minutes.
2.FUNCTION OF MAIN COMPONENT
SenderReceiverSignalLine
Multi-display(1)A/C control assemblyRear defogger switch
signalBEAN
Center cluster integration
panel
(2)
A/C control assemblyRear defogger switch
signalBEAN/AVC-LAN
(1)w/ LEXUS navigation system
(2)w/o LEXUS navigation system

Bronco
1982-85
6-CylinderOn Left Front Fender
V8On Right Inner Fender Panel
1986-87On Right Front Fender, Near Starter Relay
1988-92On Left Fender Apron
1993-952 Connectors In Left Rear Of Engine
Compartment, On Bracket
1996-Below Glove Box
Bronco II
1983-85On Right Front Inner Fender Panel (2.3L
Only)
1986-90On Right Front Fender Apron
ExcursionBehind Center Of Dash
Explorer & Mountaineer (1991-94)On Right Rear Of Engine Compartment, Near
A/C-Heater Blower
Pickup
1982-85
6-CylinderOn Left Front Fender
V8On Right Inner Fender Panel
1986-87On Right Front Fender, Near Starter Relay
1988-92On Left Fender Apron
1993-952 Connectors In Left Rear Of Engine
Compartment, On Bracket
1996-Below Center Of Instrument Panel
Pickup (F250 Heavy Duty & F350)Under Right Side Of Dash
Ranger
1983-85On Right Front Inner Fender Panel (2.3L
Only)
1986-90On Right Front Fender Apron
1991Behind Engine Compartment Fuse/Relay
Block
1992On Left Front Inner Fender Panel
1993-95On Rear Of Engine Compartment Fuse/Relay
Block
Van
1986-92On Right Fender Apron
1993-95On Left Front Corner Of Engine
Compartment
1996
5.8L (49 State, Over 8600 GVW) & 7.5L (Except
Calif.)On Left Front Corner Of Engine
Compartment

GENERAL MOTORS
GENERAL MOTORS & GEO - IMPORTED CARS & TRUCKS
Compartment
1.6LOn Right Rear Corner Of Engine
Compartment
1993-94On Right Rear Corner Of Engine
Compartment
Festiva
1992-93
1.3LOn Left Rear Corner Of Engine
Compartment
1.6LOn Right Rear Corner Of Engine
Compartment
Merkur XR4TiOn Right Front Fender Apron, Near Battery
ScorpioOn Right Rear Corner Of Engine Compartment
TracerOn Left Rear Corner Of Engine Compartment
ApplicationConnector Location
LeMansBehind Right Kick Panel, Above ECM
Metro
1989-95Under Left Side Of Dash, Near Fuse Block
1996Under Right Side Of Dash, Near Center
Console
1997-01Under Left Side Of Dash
Prizm & Prizm LSi
1989-95On Left Front Strut Tower
1996-02Under Left Side Of Dash
SpectrumUnder Right Side Of Dash, Above A/C-Heater
Blower Motor
SprintOn Left Front Shock Tower, Near Battery
Storm
1990-91Behind Right Side Of Dash, Above A/C-
Heater Blower Motor
1992-93Behind Right Kick Panel
Tracker
1989-95Under Left Side Of Dash, Near Fuse Block
1996In Engine Compartment, Near MAP Sensor
1997-Under Left Side Of Dash

INFINITI
INFINITI - IMPORTED CARS & TRUCKS
ISUZU
ISUZU - IMPORTED CARS & TRUCKS
W/O Passive Seat Belt RestraintsOn Lower Left Of Steering Column
ApplicationConnector Location
G20 (1993-95)In ECCS Control Unit, Behind Center Console
I30 (1995)Beside Fuse Box
J30
1993Under Left Side Of Dash
1994-95In ECM, Behind Right Kick Panel
1996-98Under Left Side Of Dash
M30Under Left Side Of Dash, Near Fuse Block
Q45
1990-93Under Left Side Of Dash, Near Fuse Block
1994-95In ECM, Behind Right Kick Panel
ApplicationConnector Location
Amigo & Pickup
1986-89Under Left Side Of Dash
1990-95Behind Left Kick Panel, Near ECM
1998-00Lower Left Corner Of Dash, Behind Small
Cover
HombreUnder Lower Left Side Of Dash, Behind Cover
Impulse
1986-89Under Left Side Of Dash, Above ECU
1990-92Behind Right Kick Panel
1993-95Behind Left Kick Panel, Near ECM
I-MarkBehind Right Side Of Dash, Above A/C-Heater
Blower Motor
OasisBehind Right Side Of Center Console

SUBARU
SUBARU - IMPORTED CARS & TRUCKS
9000 Series
1990On Left Side Of Engine Compartment
1991-92Under Passenger's Seat
1993On Left Of Firewall
1994-95Under Right Front Seat
ApplicationConnector Location
Brat, Coupe, Hatchback, Sedan & Wagon
1987
Read Memory ConnectorUnder Left Side Of Dash, Next To MFI/SMFI Control Unit
Test Mode Connector
MFIOn Left Side Of Dash, Next To MFI Control Unit
Sequential MFIOn Left Side Of Firewall
1988-89On Left Side Of Dash, Next To ECU
ForesterUnder Left Side of Dash, Behind Cover
Justy
1987-88
Read Memory Connector
(Factory)On Right Front Fender, Near Strut Tower
Test Mode ConnectorOn Driver-Side Kick Panel Or ECU
1989-95
Read Memory Connector
(Factory)Under Left Side Of Dash
Test Mode ConnectorOn Driver-Side Kick Panel Or ECU
Legacy
1990-94
Check Connector (Black
Connector)Behind Right Side Of Steering Column, Near Heater Case
Diagnostic Connector (Black
4-Pin Connector)Behind Right Side Of Steering Column, Near Heater Case
Read Memory Connector
(Black Connector)Behind Knee Panel, Right Of Steering Column
Select Monitor Connector
(Yellow Connector)Behind Right Side Of Steering Column, Near Heater Case
Test Mode Connector (Green
Connector)Behind Knee Panel, Right Of Steering Column

VOLKSWAGEN
VOLKSWAGEN - IMPORTED CARS & TRUCKS
1987-95On Side Of Engine Compartment Fuse/Relay
Block No. 2, Near Battery
ApplicationConnector Location
Cabrio
1996In Center Console, Below Tachometer
1997-02On Center Dash, Behind Panel Near
Ashtray
CorradoUnder Center Console Trim Plate
FoxUnder Center Console, Near Shift Lever
Golf
1993On Center Of Dash, Below A/C-Heater
Control Knobs
1994Under Center Console
1998-03In Center Console
Golf III 2.0L
1995-96Below A/C-Heater Control Panel
1997-98On Center Dash, Behind Panel Adjacent To
Ashtray
GTI
1993On Center Of Dash, Below A/C-Heater
Control Knobs
1994Under Center Console
GTI 2.8LOn Center Dash, Behind Panel Adjacent To
Ashtray
Jetta
1993On Center Of Dash, Below A/C-Heater
Control Knobs
1994Under Center Console
Jetta III 2.0L
1995-96Below A/C-Heater Control Panel
1997-98On Center Dash, Behind Panel Adjacent To
Ashtray
Jetta/Jetta III 2.8LOn Center Dash, Behind Panel Adjacent To
Ashtray
New BeetleLower Part of Dash, In Front Of Shift Lever