1986 TOYOTA CAMRY V20 ac relay replace

Rear Window Defogger Wires
CAUTION:
wWhen cleaning the glass, use a soft, dry cloth, and
wipe the glass in the direction of the wire. Take care
not to damage the wires.
wDo not use detergents or glass cleaners with abra-
sive ingredients.
wWhen measuring voltage, wind a piece of tin foil
around the top of the negative probe and press the
foil against the wire with your finger as shown.
INSPECTION OF DEFOGGER WIRES
1. INSPECT FOR WIRE BREAKAGE
(a) Turn the ignition switch to ON.
(b) Turn the defogger switch to ON.
HINT: If there are 10V, the wire is broken between the cen-
ter of the wire and positive (+) end. If there is no voltage,
the wire is broken between the center of the wire and
ground.
2. INSPECT FOR WIRE BREAKAGE POINT
(a) Place the voltmeter positive (+) lead against the de-
fogger positive (+) terminal.
(b) Place the voltmeter negative (±) lead with the foil strip
against the heat wire at the positive (+) terminal end
and slide it toward the negative (±) terminal end.
(c) The point where the voltmeter deflects from zero to
several volts is the place where the heat wire is bro-
ken.
HINT: If the heat wire is not broken, the voltmeter will ind
cafe 0V at the positive (+) end of the heat wire but gradua
ly increase to about 12V as the meter prove is moved to
the other end. 2. INSPECT RELAY OPERATION
(a) Apply battery voltage to terminals 1 and 3.
(b) Check that there is continuity between terminals 2
and 4.
(c) Check that there is no continu,ity between terminals
3 and 4.
If operation is not as specified, replace the relay.
(c) Inspect the voltage at the center of each heat wire as
shown.
Okay (No break in wire)
Approx. 1 OV or OVApprrox. 5V
Broken wire Voltage
Criteria
± BODY ELECTRICAL SYSTEMRear Window DefoggerBE±43

Heater Blower Switch
(Lever Type)
INSPECTION OF SWITCH
INSPECT SWITCH CONTINUITY
Inspect the heater blower switch continuity.
Control cables broken or binding
Servo motor faulty
Heater hoses leaking or clogged
Water valve faulty
Air dampers broken
Air ducts clogged
Heater radiator leaking or clogged
Heater control unit faulty Heater circuit breaker OFF
GAUGE fuse blown
Heater relay faulty
Blower speed control relay faulty
Heater blower switch faulty
Heater blower resistor faulty
Heater blower motor faulty wiring or
ground faultyReset breaker and check for short
Replace fuse and check for short
Check relay
Check control relay
Check switch
Check resistor
Check motor
Repair as necessary
Check cables
Check servo motor
Replace hoses
Replace water valve
Repair air dampers
Repair air ducts
Repair heater radiator
Repair control unit
*For illumination light
If continuity is not as specified, replace the switch.
Troubleshooting
BE±3
BE±3
BE±48
BE±50
BE±49
BE±48 Bolwer does not
work when fan
switch is on
Incorrect temperature
outputBE±3
BE±3
BE±48
Switch position Possible cause
BE±47
BE±48
Terminal Problem
Remedy
Lever
BE±52
Page
BE±54 Push
OFF
± BODY ELECTRICAL SYSTEMHeaterBE±47

Heater Relay
INSPECTION OF RELAY
1. INSPECT RELAY CONTINUITY
(a) Check that there is continuity between terminals 1
and 3.
(b) Check that there is continuity between terminals 2
and 4.
(e) Check that there is no continuity between terminals
4 and 5.
If continuity is not as specified, replace the relay.
2. INSPECT RELAY OPERATION
(a) Apply battery voltage to terminals 1 and 3.
(b) Check that there is continuity between terminals 4
and 5.
(e) Check that there is no continuity between terminals
2 and 4.
If operation is not as specified, replace the relay.
Heater Blower Resistor
INSPECTION OF RESISTOR
INSPECT RESISTOR CONTINUITY
(Levertype)
Check that there is continuity between terminals 1 and 3.
If there is no continuity, replace the resistor.
(Push type)
Check that there is continuity between terminals 5 and ^.
If there is no continuity, replace the resistor.
± BODY ELECTRICAL SYSTEMHeaterBE±48

Blower Speed Control Relay
(Push Type)
INSPECTION OF RELAY
1. INSPECT RELAY ºAº CONTINUITY
(a) Check that there is continuity between terminals 5
and 7.
(b) Check that there is no continuity between terminals
3 and 4.
If continuity is not as specified, replace the relay. 5. INSEPCT RECIRC/FRESH CONTROL SWITCH
CONTINUITY
Inspect the switch continuity between terminals. 4. INSPECT AIR VENT MODE SWITCH CONTINUITY
Inspect the switch continuity between terminals.
If continuity is not as specified, replace the heater control.
If continuity is not as specified, replace the heater control.
Switch
positionSwitch
position
FOOT/DEFBI±LEVELTerminal
Terminal
RECiRC
FRESH
FA C E
FOOT
Al 7 A10 At 7
A11
DEF
A12
A15
± BODY ELECTRICAL SYSTEMHeaterBE±50

6. INSPECT RELAY ºCº OPERATION
(a) Apply battery voltage to terminals 5 and 6.
(b) Check that there is continuity between terminals 1
and 3.
If operation is not as specified, replace the relay. 3. INSPECT RELAY ºBº CoNTIN'U1TY
(a) Check that there is continuity between terminals 5
and 8.
(b) Check that there is no continuity between terminals
2 and 3.
If continuity is not as specified, replace the relay.
5. INSPECT RELAY ºCº CONTINUITY
(a) Check that there is continuity between terminals 5
and 6.
(b) Check that there is no continuity between terminals
1 and 3.
If continuity is not as specified, replace the relay. 2. INSPECT RELAY ºAº OPERATION
(a) Apply battery voltage to terminals 5 and 7.
(b) Check that there is continuity between terminals 3
and 4.
If operation is not as specified, replace the relay.
4. INSPECT RELAY ºBº OPERATION
(a) Apply battery voltage to terminals 5 and 8.
(b) Check that there is continuity between terminals 2
and 3.
If operation is not as specified, replace the relay.
± BODY ELECTRICAL SYSTEMHeaterBE±51

Door Lock Solenoid
INSPECTION OF DOOR LOCK
SOLENOID
1. INSPECT SOLENOID OPERATION
(Front and Rear door)
(a) Connect the positive (+) lead from the battery to
terminal 4 and negative(±) lead to terminal 3, check
that the solenoid operation in the lock (Pull) direction.
(b) Check that there is no continuity between terminals
1 and 2.
(c) Connect the positive (+) lead from the battery to termi-
nal 3 and negative (±) lead to terminal 4, check that
the solenoid operation in the unlock (Push) direction.
(d) Check that there is continuity between terminals 1
and 2.
If operation is not as specified, replace the solenoid.
(c) Connect the positive (+) lead from the battery to ter-
minal 4 and negative (±) lead to terminal 2, check that
the solenoid operation in the unlock (Push) direction.
(d) Check that there is continuity between terminals 1
and 3.
If operation is not as specified, replace the solenoid. (Back door)
(a) Connect the positive (+) lead from the battery to
terminal 2 and negative (±) lead to terminal 4, check
that the solenoid operation in the lock (Pull) direction.
(b) Check that there is no continuity between terminals
1 and 3. (d) Reverse the polarity of the voltmeter leads.
(e) Set the door lock manual switch to LOCK, check that
the voltage rises from 0 volts to battery voltage for
approximately 0.2 seconds.
If operation is not as specified, replace the relay.
± BODY ELECTRICAL SYSTEMDoor Lock Control SystemBE±60

Moon Roof Motor
INSPECTION OF MOTOR
INSPECT MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to term
inall andnegative(±)lead toterminal2,check that
the motor turns.
(b) Connect the positive (+) lead from the battery to
terminal 2 and negative (±) lead to terminal 1, check
that the motor turns the opposite way.
If operation is not as specified, replace the motor.
Moon Roof Control Relay
INSPECTION OF RELAY
INSPECT RELAY VOLTAGE AND CONTINUITY
(a) Disconnect the relay connector and inspect the con-
nector on the wire harness side as shown in the
chart.
Limit Switch
INSPECTION OF SWITCH
INSPECT SWITCH CONTINUITY
(a) Check that there is continuity between terminals 1
and 4 when the switch is ON.
(b) Check that there is no continuity between terminals
1 and 4 when the switch is OFF.
If continuity is not as specified, replace the switch.
MOON ROOF
Moon Roof Switch
INSPECTION OF SWITCH
INSPECT SWITCH CONTINUITY
Inspect the switch continuity between terminals.
If continuity is not as specified, replace the
switch.
Switch positionTerminal
CLOSEOPEN
± BODY ELECTRICAL SYSTEMMoon RoofBE±61

(b) Connect the positive lead from the battery to termi-
nal 1 and±negative (±y lead to terminal 5, check that
the motor turns to close. Then, reverse the polarity,
check that the motor turns to open. 1f motor does not
operate, remove and test the motor.
If circuit operation is correct, replace the relay.
Push sun roof switch to except CLOSE
Push sun roof switch to except OPEN Push sun roof switch to CLOSE
Push sun roof switch to OPEN Turn ignition switch OFFTurn ignition switch ON
Push limit switch ON
Push limit switch OFFSpecified value Tester
connection
10 ± Body ground
12 ± Body ground8 ± Body ground 4 ± Body ground
6 ± Body ground
7 ± Body groundBattery voltage
No continuity
No continuity No continuity
Continuity Continuity
Continuity
Continuity Continuity
Continuity No.voitage
Continuity Continuity
Continuity Continuity
ConditionCheck for
Voltage
± BODY ELECTRICAL SYSTEMMoon RoofBE±62