fog light TOYOTA RAV4 1996 Service Repair Manual

3. With squib circuit connector disconnected, insert paper into female terminal, sliding it under shorting bar
spring. This lifts the spring, breaking the circuit and allowing the test procedure to be performed as
specified.
TESTING - DIAGNOSTIC
NO CODES - SOURCE VOLTAGE DROP
1. Disconnect negative battery cable. Wait at least 90 seconds. Remove steering wheel pad. See
STEERING WHEEL PAD & SPIRAL CABLE
under REMOVAL & INSTALLATION. Disconnect
passenger-side air bag harness connector, accessible through finish plate in glove box. See Fig. 2
.
Disconnect air bag sensor assembly connector.
2. Reconnect negative battery cable. Turn ignition switch to ON position. Measure voltage between ground
and terminals IG2 and ACC of air bag sensor connector. See Fig. 13
. Operate electrical components
(defogger, wiper, headlights, heater blower, etc.). If voltage is 8-14 volts, go to next step. If voltage is not
8-14 volts, check harness between battery and air bag sensor assembly and check battery and charging
system.
3. Turn ignition switch to LOCK position. Connect steering wheel pad connector. Connect passenger-side
air bag connector. Turn ignition switch to ON position. Operate electrical components as in step 2) and
check that SRS warning light goes off. If light does not go off, check diagnostic trouble code and go to
appropriate CODE under TESTING - DIAGNOSTIC. If a normal code is output, replace air bag sensor
assembly. If warning light goes off, no problem detected at this time.
CODE 11
1. Disconnect negative battery cable. Wait at least 90 seconds. Remove steering wheel pad. See
STEERING WHEEL PAD & SPIRAL CABLE
under REMOVAL & INSTALLATION. Disconnect
passenger-side air bag harness connector, accessible through finish plate in glove box. See Fig. 2
.
Disconnect air bag sensor assembly connector.
2. Measure resistance on spiral cable side of connector between spiral cable and steering wheel pad between
D+, D- and ground. If resistance is 1000 ohms or more, go to next step. If resistance is less than 1000
ohms, go to step 7).
3. Measure resistance on air ba
g sensor assembly side of connector between air bag sensor and passenger- WARNING:Paper must not be thicker than male terminal. If paper is thicker,
connector terminal may be damaged, possible resulting in system
fault.
NOTE: Use Diagnosis Check Wiring (09843-18020) when connecting jumper wire
between terminals of DLC. Spiral cable upper connector is same as steering
wheel pad (squib) connector. Spiral cable lower connector (located under
steering column) connects the harness between spiral cable and center air bag
sensor.
NOTE: During testing, if codes other than Code 11 are displayed, disregard them.

1996 Toyota 4Runner
AIR BAG RESTRAINT SYSTEM 1996 ACCESSORIES/SAFETY EQUIPMENT Toyota Air Bag Restraint System
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When DLC1 terminals Tc and E1 are connected together, air bag sensor assembly is set in Diagnostic Trouble
Code (DTC) output mode. DTC is displayed by flashing AIR BAG warning light.
Diagnostic Procedure
1. Turn ignition switch to LOCK position. Disconnect negative battery cable. Wait at least 90 seconds.
Access and disconnect air bag sensor assembly connector C20 (center connector). See AIR BAG
SENSOR ASSEMBLY under REMOVAL & INSTALLATION
.
2. Measure resistance between ground and air bag sensor assembly connector C20, terminal No. 19 (circuit
Tc, Pink/Black wire). See Fig. 16
. If resistance is more than one megohm, replace air bag sensor
assembly. If resistance is less than one megohm, replace harness and connector.
SOURCE VOLTAGE DROP
Description
The air bag sensor assembly is equipped with a voltage-increase circuit to allow system operation in case source
(battery) voltage drops below minimum. When battery voltage drops, voltage-increase circuit functions to
increase voltage of air bag system to normal voltage.
The malfunction display for this circuit is different from other air bag system circuits. When source voltage
drop is detected and no other DTCs are present, the AIR BAG warning light remains illuminated constantly.
Source voltage drop is not recorded in air bag sensor assembly as a malfunction, and when source voltage
returns to normal, AIR BAG warning light will turn off.
Diagnostic Procedure
1. Turn ignition switch to LOCK position. Disable air bag system. See DISABLING SYSTEM under
DISABLING AND ACTIVATING AIR BAG SYSTEM. Reconnect negative battery cable.
2. Turn ignition switch to ON position. Turn on electrical accessories (defogger, wipers, headlights, blower
motor, etc.). Measure voltage between ground and air bag sensor assembly connector C20, terminals No.
5 (circuit IG2, Black/Orange wire) and No. 6 (circuit ACC, Gray wire). See Fig. 16
. Turn electrical
accessories off. If voltage is 10-14 volts, go to next step. If voltage is not 10-14 volts, check harness
between battery and air bag sensor assembly and check battery and charging system.
3. Turn ignition switch to LOCK position. Activate air bag system. See ACTIVATING SYSTEM
under
DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition switch to ON position. Turn on
electrical accessories again. If AIR BAG warning light goes out, system operation is normal at this time.
If AIR BAG warning light does not go out, check for DTCs. See RETRIEVING CODES
under
DIAGNOSIS & TESTING. If DTC is displayed, go to appropriate DTC. If a normal code is displayed (2
flashes per second), replace air bag sensor assembly.
DTC 11/B0102: DRIVER-SIDE AIR BAG SQUIB CIRCUIT SHORT TO GROUND
Description
The driver-side air bag squib circuit consists of the air bag sensor assembly, spiral cable and driver-side air bag
module. The squib causes drive
r-side air bag to deploy when all deployment conditions are satisfied.

1999 Toyota RAV4
AIR BAG RESTRAINT SYSTEM 1999 Toyota
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Blown fuse or poor contact. Defogger switch defective. Poor connections. Broken wire. Relay defective.
INDICATOR LIGHT DOES NOT WORK
Bulb burned out. Open wire or poor connection.
REAR WINDOW DEFOGGER SYSTEM CHECK
1. Ensure all in-line fuses or circuit breakers are okay. Turn ignition and control switches to ON position.
Glass should feel warm after a few minutes.
2. If glass is not warm, use a test light or voltmeter to check for battery voltage at grid feed wire. If voltage
is not correct, check wiring harness, control switch and timer/relay.
SYSTEM TESTS
DEFOGGER SWITCH CIRCUIT
2000 Celica
1. Disconnect defogger switch 10-pin connector. Check continuity between ground and defogger switch
harness connector terminal No. 3 (White/Black wire). See Fig. 2
. If continuity exists, go to next step. If
continuity does not exist, repair ground circuit as necessary. See WIRING DIAGRAMS
.
2. Turn ignition on. Measure voltage between ground and defogger switch harness connector terminal No. 5
(Red/White wire). Battery voltage should exist. With ignition switch in LOCK or ACC position, no
voltage should exist. If voltage is as specified, go to next step. If voltage is not as specified, repair
appropriate circuit as necessary. See WIRING DIAGRAMS
.
3. Connect defogger switch harness connector. Turn ignition on. Measure voltage between ground and
defogger switch connector (backprobe) terminal No. 5 (Red/White wire). Battery voltage should exist.
Turn defogger switch to ON position. No voltage should exist. If voltage is not as specified, replace
defo
gger switch and retest system.

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REARVIEW MIRROR DEFOGGER TIMER OPERATION
Land Cruiser
1. Remove climate control (A/C-heater control) panel. Connect (backprobe) DVOM negative lead to
connector C9 terminal No. 22. Connect DVOM positive lead to connector C9 terminals No. 2 and 12, and
connector C7 terminal No. 8. See Fig. 12
. Turn ignition switch to ON position and measure voltage.
2. With defogger switch OFF, voltage should be about 12 volts. Turn defogger switch ON and ensure DEF
switch indicator is illuminated. Voltage should be less than one volt for about 15 minutes. After 15
minutes, defogger switch should turn off and voltage should be about 12 volts. Replace defogger switch i
f
voltage is not as specified is not as specified.
COMPONENT TESTS
DEFOGGER SWITCH TEST
1999 Avalon
1. If equipped with automatic A/C-heater system, backprobe defogger switch terminal No. 10 (Blue/Yellow
wire) with positive voltmeter lead and terminal No. 11 (White/Black wire) with negative lead. See Fig. 6
.
If equipped with manual A/C-heater system, backprobe defogger switch terminal No. 11 (Blue/Yellow
wire) with positive voltmeter lead and terminal No. 5 (White/Black wire) with negative lead. See Fig. 7
.
2. On all models, ensure battery voltage exists with defogger switch in OFF position. Turn defogger switch
to ON position. Ensure indicator light is on and less than one volt exists. After 15 minutes, defogger
switch should turn off and battery voltage should exist again. If defogger switch does not operate as
specified, replace switch.

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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Fig. 7: Identifying Defogger Switch Terminals (1999 Avalon - With Manual A/C-Heater System)
2000 Avalon (With Automatic A/C-Heater System)
1. Disconnect A/C-heater control panel harness connectors. Connect jumper wires between battery positive
and A/C-heater control panel 26-pin connector terminals No. 1 (White/Green wire) and No. 2 (Red/White
wire). See Fig. 8
.
2. Connect another jumper wire between ground and A/C-heater control panel 26-pin connector terminal
No. 24 (White/Black wire). Connect a 1.4-watt test light between battery positive and A/C-heater control
panel 26-pin connector terminal No. 18 (Red/Black wire).
3. Turn rear window defogger switch on. Test light, rear window defogger indicator and mirror heater
indicator (if equipped) should illuminate, then turn off after about 15 minutes. Replace A/C-heater control
NOTE: Defogger switch testing information for 2000 Avalon with manual A/C-heater
system is not available from manufacturer.

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1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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panel if operation is not as specified.
Fig. 8: Testing Rear Window Defogger Switch (2000 Avalon With Automatic A/C
-Heater System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Camry & Camry Solara
1. Remove rear defogger switch. Terminals No. 2 and 6 are for bulb illumination. Using an ohmmeter,
check for continuity between terminals No. 2 and 6 of switch. See Fig. 9
. Continuity should exist at all
times. If continuity does not exist, check illumination bulb.
2. Connect battery positive lead to terminal No. 4, and battery negative lead to terminal No. 3. See Fig. 9
.
Connect a 3.4-watt test light between battery voltage and terminal No. 5. Turn defogger on. Ensure test
light comes on for 12-18 minutes and then goes out. If switch does not operate as specified, replace
switch.

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1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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Fig. 9: Identifying Defogger Switch Terminals (Camry, Camry Solara, 1999 Celica, Corolla, Sienna,
Tercel & 4Runner)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1999 Celica
1. Backprobe defogger switch terminal No. 5 with positive voltmeter lead and terminal No. 4 with negative
lead. See Fig. 9
. Ensure battery voltage exists with defogger switch in OFF position. Turn defogger
switch to ON position. Ensure indicator light is on and less than one volt exists. If voltage is not as
specified, replace switch.
2. Terminals No. 2 and 6 are for bulb illumination. Using an ohmmeter, check for continuity between switch
terminals No. 2 and 6. See Fig. 9
. Continuity should exist at all times.
3. If defogger switch is equipped with timer, ensure defogger switch turns off and battery voltage is again
present after 12-18 minutes. If defogger switch does not operate as specified, replace switch.
2000 Celica
1. Disconnect defogger switch 10-pin connector. Connect a jumper wire between battery positive and
defogger switch terminal No. 1. See Fig. 2
. Connect another jumper wire between ground and terminal
No. 3.
2. Connect a 3.4-watt test light between battery positive and defogger switch terminal No. 5. Turn defogger
switch to ON position. Test light and indicator light should illuminate on for 12-18 seconds, then turn off.
If operation is not as specified, replace defogger switch.
Corolla (With Timer)
Disconnect defogger switch 6-pin connector. Connect fused jumper between battery positive lead and terminal
No. 2 and battery negative lead to terminal No. 3 (switch side). Connect a 3.4-watt test light between terminal
No. 6 and battery voltage. See Fig. 10 . Push defogger switch to ON position. Ensure test light and indicator

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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light come on for 12-18 minutes and then goes out. If switch does not operate as specified, replace switch.
Fig. 10: Testing Defogger Switch With Timer (Corolla & Tercel)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Corolla (Without Timer)
Disconnect defogger switch 6-pin connector. With defogger switch on, ensure continuity exists between
terminals No. 3 and 6. See Fig. 9
. With switch off, continuity should not exist between any terminals. Check
continuity between terminals No. 1 and 4 (light bulb). Continuity should exist at all times. If continuity is not as
specified, replace switch.
ECHO (With Timer)
1. Disconnect defogger switch 4-pin connector. Connect a jumper wire between battery positive terminal
and defogger switch terminal No. 3. See Fig. 11
. Connect another jumper wire between ground and
terminal No. 4.
2. Connect a 3.4-watt test light between battery positive and terminal No. 2. Turn defogger switch to ON
position. Indicator light and test light should come on, then turn off after 12-18 minutes. Replace switch i
f
operation is not as specified.
ECHO (Without Timer)

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1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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Fig. 12: Identifying Front A/C-Heater Control Assembly Terminals (Land Cruiser)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
MR2
1. Disconnect defogger switch 14-pin connector. Connect a jumper wire between battery positive and
defogger switch terminal No. 1. See Fig. 3
. Connect another jumper wire between ground and terminal
No. 4.
2. Connect a 3.4-watt test light between battery positive and terminal No. 12. Turn defogger switch on.
Indicator and test light should turn on, then turn off after 12-18 minutes. Replace defogger switch if
operation is not as specified.
RAV4
1. Remove rear defogger switch. Check continuity between specified switch terminals. See DEFOGGER
SWITCH CONTINUITY TEST (RAV4) table. See Fig. 13 . If continuity is not as specified, replace
switch.
DEFOGGER SWITCH CONTINUITY TEST (RAV4)
Switch Position(1) Terminals No.Continuity
OFFNoneNo
ON3, 5 & 8Yes
ON (Illumination)3 & 5Yes
Illumination2 & 6Yes
(1)See Fig. 13 .

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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Fig. 13: Identifying Defogger Switch Terminals (RAV4)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Sienna
1. Remove defogger switch. Terminals No. 1 and 4 are for bulb illumination. Check continuity between
defogger switch terminals No. 1 and 3. See Fig. 9
. Continuity should exist at all times. If continuity does
not exist, check illumination bulb.
2. Connect a jumper wire between battery positive and terminal No. 2. Connect another jumper wire
between ground and terminal No. 4. Connect a 3.4-watt test light between battery positive and terminal
No. 6. Turn defogger on. Ensure test light comes on for 12-18 minutes and then goes out. If switch does
not operate as specified, replace switch.
Tercel
1. Remove defogger switch. Terminals No. 1 and 4 are for bulb illumination. Check continuity between
defogger switch terminals No. 1 and 4. See Fig. 9
. If continuity exists, go to next step. If continuity does
not exist, check illumination bulb.
2. On models without timer, check continuity between defogger switch terminals No. 2, 3 and 6 with switch
in ON position. See Fig. 9
. With defogger switch off, continuity should not exist between any terminals.
If continuity is not as specified, replace defogger switch and retest system.
3. On models with timer, connect jumper wire between battery positive lead and defogger switch terminal
No. 2. Connect another jumper wire between ground and terminal No. 3. Connect a 3.4-watt test light
between battery positive and terminal No. 6. See Fig. 10
. Turn defogger switch to ON position. Ensure
indicator light and test light come on for 12-18 minutes and then go out. If defogger switch with timer
does not operate as specified, replace switch.
4Runner

1999 Toyota RAV4
1999-2000 ACCESSORIES & EQUIPMENT Rear Window & Mirror Defoggers
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