TOYOTA RAV4 1996 Service Repair Manual

HAZARD WARNING SWITCH CONTINUITY
Fig. 13: Identifying Hazard Warning Switch Terminals

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LIGHT CONTROL RHEOSTAT
Land Cruiser & Sienna
Remove light control rheostat on left side of instrument panel. Using jumper wires, connect battery positive
ModelLocation
Land CruiserBehind Left Side Of Instrument Panel, Near Steering Column
Sienna & 4RunnerIn Junction Block No. 1, Left Of Steering Column
RAV4In Relay Block No. 5, Behind Left Kick Panel
TacomaBehind Left Side Of Instrument Panel, In Junction Block No. 1
Switch PositionTerminals No.Continuity
Sienna (1)
Off5 & 7Yes
On1, 2 & 4; 5 & 6Yes
4Runner (2)
Off7 & 10Yes
On5, 6 & 9; 7 & 8Yes
All Other Models (2)
Off7 & 10Yes
On4, 5, 6 & 9; 7 & 8Yes
(1)Terminals No. 8 and 9 are for switch illumination bulb.
(2)Terminals No. 2 and 3 are for switch illumination bulb.

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voltage to terminal No. 1 and negative voltage to terminal No. 3. See Fig. 14. Check voltage between terminals
No. 2 and 3. Voltage should change when knob is turned. If voltage does not change, replace rheostat light
control.
RAV4, Tacoma, Tundra & 4Runner
1. Remove light control rheostat. Light control rheostat is located on left side of instrument panel. Using
jumper wires, connect positive battery terminal to light control rheostat terminal No. 1 and negative
battery terminal to terminal No. 2. See Fig. 15
.
2. Connect a 12-volt, 3.4-watt test light between light control rheostat terminals No. 1 and 3. Slowly rotate
light control rheostat knob counterclockwise from bright side to dark side. Test light should turn off. See
Fig. 15
.
3. Slowly rotate light control rheostat knob clockwise from dark side to bright side. Test light should change
from dark to bright. If operation is not as specified, replace light control rheostat.
Fig. 14: Testing Rheostat Light Control (Land Cruiser & Sienna)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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Fig. 15: Testing Rheostat Light Control (RAV4, Tacoma, Tundra & 4Runner)
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LOW OIL PRESSURE SWITCH
RAV4, Sienna, Tacoma, Tundra Without Tachometer & 4Runner
Disconnect low oil pressure switch connector. See OIL PRESSURE SWITCH LOCATION table. Using an
ohmmeter, check for continuity between oil switch and ground. Continuity should exist with engine off.
Continuity should not exist with engine running. If continuity is not as specified, replace low oil pressure
switch.
OIL PRESSURE SWITCH LOCATION
NOTE: Tundra models without a tachometer are equipped with an oil pressure switch.
Tundra models with a tachometer are equipped with an oil pressure sender. For
oil pressure sender testing, see OIL PRESSURE GAUGE & SENDER
.
ApplicationLocation
RAV4Rear Of Cylinder Head, Exhaust Side
SiennaLower Left Front Of Cylinder Block
Tacoma & 4Runner
4-CylinderRight Side Of Cylinder Block
V6Left Front Of Cylinder Block
TundraBeside Oil Filter

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LOW OIL PRESSURE WARNING LIGHT
RAV4, Sienna, Tacoma, Tundra Without Tachometer & 4Runner
Disconnect low oil pressure switch connector. See OIL PRESSURE SWITCH LOCATION table. Using a
jumper wire, connect low oil pressure switch connector terminal to ground. Turn ignition switch to ON position.
Low oil pressure warning light should turn on. If low oil pressure warning light is off, check bulb or inspect
wiring harness.
OCCUPANT DETECTION SENSOR
Land Cruiser & Tundra
Disconnect occupant detection sensor connector, located under passenger seat. Check continuity between sensor
connector terminals. Continuity should exist only when pressing on sensor. If continuity is not as specified,
replace occupant detection sensor.
OIL PRESSURE GAUGE & SENDER
Oil Pressure Gauge & Harness Operational Test (Land Cruiser & Tundra With Tachometer)
1. Disconnect oil pressure sender connector. See OIL PRESSURE SENDER LOCATION table. Turn
ignition switch to ON position. Oil gauge should indicate LOW. Turn ignition switch to OFF position.
Connect a 12-volt, 3.4-watt test light between oil sending unit harness connector terminal and ground.
2. Turn ignition switch to ON position. Test light should be on and oil pressure gauge should slowly move
to HIGH. If gauge functions as specified, perform OIL PRESSURE SENDER OPERATIONAL
TEST . If gauge does not function as specified, perform OIL PRESSURE GAUGE RESISTANCE
TEST .
Oil Pressure Sender Operational Test (Land Cruiser & Tundra With Tachometer)
Disconnect oil pressure sender connector. See OIL PRESSURE SENDER LOCATION table. Using 12-volt
source, connect an LED tester between positive battery terminal and oil pressure sender terminal. With engine
off, LED should be off. With engine running, LED should flash. LED flashes will vary with engine speed and
oil pressure. Replace oil pressure sender if LED does not operate as specified.
OIL PRESSURE SENDER LOCATION
Oil Pressure Gauge Resistance Test (Land Cruiser & Tundra With Tachometer)
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Using
an ohmmeter, check resistance between oil gauge terminals on rear of instrument cluster. See Fig. 16
or Fig.
17 . See OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS table. If resistance is not as
specified, replace oil pressure
gauge.
ApplicationLocation
Land Cruiser & TundraOn Oil Filter Housing

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1999-2000 ACCESSORIES & EQUIPMENT Instrument Panels - Trucks
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OIL PRESSURE GAUGE RESISTANCE SPECIFICATIONS
Fig. 16: Identifying Oil Pressure Gauge Terminals (Land Cruiser)

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Application & TerminalsOhms
Land Cruiser
Terminals A & B44
Tundra With Tachometer
A & B25

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Fig. 17: Identifying Oil Pressure Gauge Terminals (Tundra)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OPEN DOOR WARNING LIGHT
Land Cruiser, Sienna, RAV4 & 4Runner
Locate door courtesy switch in door jamb. Disconnect door courtesy switch 1-pin connector. Ground door
courtesy switch wiring harness connector terminal. Open door warning light should be on. If open door warning
light is off, check bulb and wiring harness. Repair as necessary.
PARKING BRAKE SWITCH
Land Cruiser, Sienna, Tacoma, Tundra & 4Runner
Disconnect parking brake switch, located at base of parking brake handle. Ensure continuity exists between
switch terminals when switch is ON (pin released). Ensure continuity does not exist between switch terminals
when switch is OFF (pin pushed in). If continuity is not as specified, replace switch.
RAV4

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Disconnect parking brake switch, located at base of parking brake handle. Ensure continuity exists between
switch terminal and switch body when switch is ON (pin released). Ensure continuity does not exist between
switch terminal and switch body when switch is OFF (pin pushed in). If continuity is not as specified, replace
switch.
SEAT BELT BUCKLE SWITCH
Land Cruiser, Tacoma, Tundra & 4Runner
Disconnect seat belt buckle switch connector at bottom of inner seat belt. Check for continuity between seat belt
buckle switch terminals. With seat belt buckle switch on (belt unfastened), continuity should exist. With seat
belt buckle switch off (belt fastened), no continuity should exist. If continuity is not as specified, replace seat
belt.
SEAT BELT RETRACTOR SWITCH
RAV4 & Sienna
Disconnect seat belt retractor switch 2-pin connector. See Fig. 18 . Check for continuity between seat belt
retractor switch terminals. With seat belt retractor switch on (belt retracted), continuity should exist. With seat
belt retractor switch off (belt fastened), no continuity should exist. If continuity is not as specified, replace seat
belt retractor switch.

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Fig. 18: Testing Seat Belt Retractor Switch (RAV4 & Sienna)
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SEAT BELT WARNING LIGHT
Land Cruiser
Turn ignition switch to OFF position. Disconnect seat belt buckle switch connector at bottom of inner seat belt.
Connect a jumper wire between seat belt buckle switch wiring harness connector terminals. Turn ignition on.
Seat belt warning light should be on. If seat belt warning light is off, check bulb and wiring harness. Repair as
necessary.
Sienna
Turn ignition switch to OFF position. Remove integration relay from instrument panel junction block No. 1, to
left of steering column. Using a jumper wire, ground integration relay terminal No. 9 in junction block. See Fi
g.
19 . Turn ignition switch to ON position. Seat belt warning light should be on. If seat belt warning light is off,

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check bulb and wiring harness. Repair as necessary.
SEAT BELT WARNING SYSTEM
Integration Relay Operation (Sienna)
1. Turn ignition switch to OFF position. Remove integration relay from junction block No. 1, to left of
steering column. Using a jumper wire, connect positive battery terminal to integration relay terminals No.
1 and 7. See Fig. 19
. Connect a 12-volt, 3.4-watt test light between integration relay terminals No. 7 and
9.
2. Using a jumper wire, connect negative battery terminal to integration relay terminal No. 10. Test light
should be on and relay buzzer should sound for 4-8 seconds.
3. Repeat previous steps and operate relay buzzer again. With buzzer on, connect another jumper wire
between negative battery terminal and integration relay terminal No. 8. Buzzer noise should stop. If
operation is not as specified, replace integration relay.
Fig. 19: Testing Integration Relay (Sienna)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
SPEEDOMETER
Speedometer Operational Test (Land Cruiser)

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Ensure tires are correct size and inflated properly. Place vehicle on standard speedometer tester. Compare tester
with speedometer readings. See SPEEDOMETER TEST
table. If vehicle speedometer readings are not within
allowable range, replace speedometer. If speedometer does not operate at all, check speedometer resistance. If
speedometer resistance is okay, check vehicle speed sensor. See appropriate SYSTEM & COMPONENT
TESTING article in ENGINE PERFORMANCE.
Speedometer Operational Test (Except Land Cruiser)
Ensure tires are correct size and inflated properly. Place vehicle on standard speedometer tester. Compare tester
with speedometer readings. See SPEEDOMETER TEST
table. If vehicle speedometer readings are not within
allowable range, replace speedometer. If speedometer does not operate at all, check vehicle speed sensor. See
SYSTEM & COMPONENT TESTING article in ENGINE PERFORMANCE.
SPEEDOMETER TEST
Speedometer Resistance (Land Cruiser & Tundra)
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Using
an ohmmeter, check resistance between speedometer terminals on rear of instrument cluster. See Fig. 6
and Fig.
20 . See SPEEDOMETER RESISTANCE table. If resistance is not as specified, replace speedometer.
SPEEDOMETER RESISTANCE
Standard Indication (MPH)Allowable Range (MPH)
2018-24
4038-44
6056-66
8078-88
10098-110
120118-132
ApplicationOhms
Land Cruiser & Tundra
Terminals "A" & "B"160
Terminals "C" & "D"160

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1999-2000 ACCESSORIES & EQUIPMENT Instrument Panels - Trucks
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