TOYOTA CAMRY V20 1986 Service Information

INSPECTION OF REAR SPEED
SENSOR
1. INSPECT SPEED SENSOR
(a) Remove the rear seat cushion.
(b) Disconnect the speed sensor connector.
(c) Measure the resistance between terminals.
Resistance: 0.85 ± 1.50 k


If resistance value is not as specified, replace the sensor.
2. INSPECT SENSOR INSTALLATION
(a) Check that the sensor installation bolt is tightened
properly. If not, tighten the bolt.
Torque: 195 kg±cm (14 ft±Ib, 19 N±m)
(b) Check that there is no clearance between the sen-
sor and rear axle carrier as shown.
If there is clearance, replace the sensor. (d) Check that there is no continuity between each ter-
minal and sensor body.
If there is continuity, replace the sensor:
(e) Connect the speed sensor connector.
(f) Install the rear seat cushion.
Rear Speed Sensor (4WD)
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±100

INSPECTION OF REAR SPEED SENSOR AND
SENSOR ROTOR SERRATIONS (REFERENCE)
INSPECT REAR SPEED SENSOR AND SENSOR ROTOR
SERRATIONS BY USING AN OSCILLOSCOPE
(a) Connect an oscilloscope to the speed sensor connec-
tor.
(b) Run the vehicle at 20 km/h (12.4 mph), and inspect
speed sensor output wave.
(e) Check that C is 0.5 V or more.
If not as specified, replace the speed sensor.
(d) Check that B is 60% or more of A.
If not as specified, replace the rear drive shaft. 3. VISUALLY INSPECT SENSOR ROTOR SERRATIONS
(a) Remove the drive shaft.
(See page RA±21)
(b) Inspect the sensor rotor serrations for scratches,
cracks, warping or missing teeth.
(c) Install the drive shaft.
(See page RA±26)
NOTICE: To prevent damage to the serrations, do not strike
the drive shaft.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±101

Anti±lock Brake System Circuit
INSPECTION OF SYSTEM CIRCUIT
1. INSPECT SYSTEM CIRCUIT WITH CONNECTOR
CONNECTED
(a) Remove the A.B.S. computer.
(b) Using a voltmeter with high impedance (10 K

/V
minimum), measure the voltage at each terminal and
body ground.
If the circuit is not as specified, check and repair or re-
place the trouble part shown in the table above.
Ignition switch on and ºANTI LOCKº warning light goes on
Ignition switch on and ºANTI LOCKº warning light goes on
Ignition switch on and ºANTI LOCKº warning light goes onIgnition switch on and ºANTI LOCKº warning light goes on Ignition switch on and ºANTI LOCKº warning light goes on
Ignition switch on and ºANTI LOCKº warning light goes on
Check connector connectedºANTI LOCKº
warning light bulb
Check connector disconnected
Check connector,
computer Actuator, control
relays
AST ± Body groundSRR ± Body groundSRl ± Body ground SFR ± Body groundSFL ± Body ground
W ± Body ground
T ± Body ground Tester Connection
Ignition switch on Ignition switch on
Ignition switch on Ignition switch on
Ignition switch on Ignition switch on
Battery voltage Battery voltage
Battery voltage Battery voitage Battery voltage
Battery voltage Battery voltageTrouble Part
About 0 V
About 0 V About 0 V About 0 V
About 0 V
About 0 V
About 0 V ConditionVoltage
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±102

2. INSPECT SYSTEM CIRCUIT WITH CONNECTOR
DISCONNECTED
(a) Disconnect the connectors from the computer, in-
spect at the wire harness side connector.
If the circuit is not as specified, check and repair or re-
place the trouble part shown in the table above.
(b) Connect the connectors, and install the comput-
er cover.
Ignition switch off and brake pedal depressed
Engine running and PKB lever returned Ignition switch off and brake pedal returned
Ignition switch on and PKB lever pulled
Parking broke switch,
level warning switchStop light switch,
stop light Voltage or
Resistance Value
Check connector,
wiring harness
Front RH speed
sensor
FrontrH speed
sensor Ts connector,
wiring harness
Rear RH speed
sensor
Rear RH speed
sensor
Rear LH speed
sensorRear LH speed
sensor Ts connector shorted
Ignition switch offIgnition switch off
Ignition switch off
Ignition switch off Ignition switch off Tester Connection
Ignition switch offIgnition switch off
Ignition switch off
Ignition switch off Ignition switch off Ignition switch off
Ignition switch offIgnition switch off
Ignition switch onBattery voltage
No continuity
Battery voltage
0.85 ± 1.30 k fl
0.85± 1.30k
Battery voltage
Wiring harnessWiring harness
Wiring harness Battery voltage
0.85 ± 1.50 k
0.85 ± 1.50 k

No continuityNo continuity
No continuityNo continuityNo continuityTrouble Part
65±100

ECU±IG fuse Chrak Item
50±80

About 6
ContinuityResistance
Resistance
About 5
ResistanceAbout 6 0
Resistance
ResistanceAbout 6

ResistanceContinuity Resistance
Resistance
ResistanceContinuity
ResistanceAbout 6

ResistanceContinuity
Continuity
Continuity
ContinuityContinuity Continuity
Continuity Continuity
About 0 v
Continuity Continuity
Continuity
Continuity
FOG fuse Condition
ActuatorActuator
Actuator Voltage
VoltageVortege
Actuator Voltage
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±103

1. REMOVE A.B.S. COMPUTER
(a) Remove the computer cover.
(b) Remove the five screws holding the computer to the
computer bracket.
(e) Pull out the wire harness from the clamp on the
bracket, and pull out the connector from the clamp
on the bracket.
(d) Disconnect the three connectors, and remove the
A.B.S. computer.
2. REMOVE DECELERATION SENSOR
Remove the two screws, and remove the deceleration
sensor.
NOTICE: Do not drive without normal installation of decel-
eration sensor and computer assembly.
REMOVAL AND INSTALLATION OF A.B.S.
COMPUTER AND DECELERATION SENSOR
(For 4WD)
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±104

3. INSTALL DECELERATION SENSOR
(a) Install the deceleration sensor to the bracket with the
two screws.
Torque: 32.5 kg±cm (28 in.±Ib, 3.2 N±m)
(b) Install the connector to the clamp on the bracket.
(c) Check that the deceleration sensor is installed prop-
erly.
4. INSTALL A.B.S. COMPUTER
(a) Connect the three connectors and insert the wire har-
ness to the clamp.
(b) Set the computer in place, and install it with the five
screws.
Torque: 32.5 kg±cm (28 in.±Ib, 3.2 N±m)
(c) Install the computer cover.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±105

CHARGING SYSTEM
± CHARGING SYSTEMCH±1

PRECAUTIONS
1. Check that the battery cables are connected to the correct
terminals.
2. Disconnect the battery cables when the battery is given a
quick charge.
3. Do not perform tests with a high voltage insulation
resistance tester.
4. Never disconnect the battery when the engine is running.
TROUBLESHOOTING
Drive belt loose or worn
Battery cables loose, corroded or worm
Fuse blown
Fusible link blown
IC regulator or alternator faulty
Wiring faultyAdjust or replace drive belt
Repair or replace cables
Check ºENGINEº fuse
Replace fusible link
Check charging system
Repair wiring Check ºCHARGEº and ºIGNº
fuses
Replace light
Tighten loose connections
Replace IC regulator
Discharge warning
light does not go out
with engine running
(battery requires
frequent recharging) Discharge warning
light does not light
with ignition ON and
and engine not
runningLight burned out
Wiring connections loose
IC regulator faultyPossible cause
Fuse blownRemedy
Problem
CH±6
CH±4 CH±3 Page
± CHARGING SYSTEMPrecautionsCH±2

PRECAUTIONS
1. Check that the battery cables are connected to the correct
terminals.
2. Disconnect the battery cables when the battery is given a
quick charge.
3. Do not perform tests with a high voltage insulation
resistance tester.
4. Never disconnect the battery when the engine is running.
TROUBLESHOOTING
Drive belt loose or worn
Battery cables loose, corroded or worm
Fuse blown
Fusible link blown
IC regulator or alternator faulty
Wiring faultyAdjust or replace drive belt
Repair or replace cables
Check ºENGINEº fuse
Replace fusible link
Check charging system
Repair wiring Check ºCHARGEº and ºIGNº
fuses
Replace light
Tighten loose connections
Replace IC regulator
Discharge warning
light does not go out
with engine running
(battery requires
frequent recharging) Discharge warning
light does not light
with ignition ON and
and engine not
runningLight burned out
Wiring connections loose
IC regulator faultyPossible cause
Fuse blownRemedy
Problem
CH±6
CH±4 CH±3 Page
± CHARGING SYSTEMTroubleshootingCH±2

ON±VEHICLE INSPECTION
1. INSPECT BATTERY SPECIFIC GRAVITY AND
ELECTROLYTE LEVEL
(a) Check the specific gravity of each cell.
Standard specific gravity:
1.25 ± 1.27 when fully charged at 20°C (68°F)
If not within specifications, charge the battery.
(b) Check the electrolyte quantity of each cell.
If insufficient, refill with distilled (or purified) water.
2. CHECK BATTERY TERMINALS, FUSIBLE LINKS AND
FUSES
(a) Check that the battery terminals are not loose or corroded.
(b) Using a belt tension gauge, measure the drive belt ten-
sion.
Belt tension gauge:
Nippondenso ± BTG±20 (95506±00020)
Boroughs No. BT±33±73F
Drive belt tension:
3S±FE w/ A/C New belt 175
+ 5 Ib
Used belt 130
+ 10 Ib
w/o A/C New belt 125
+ 25 Ib
Used belt 95
+ 20 ib
2vZ±FE New belt 15
+ 51b
Used belt 5
+ 20 Ib
If the belt tension is not as specified, adjust it. 3. INSPECT DRIVE BELT
(a) Visually check the belt for excessive wear, frayed cords etc.
If necessary, replace the drive belt.
HINT: Cracks on the rib side of a belt are considered accept-
able. If the belt has chunks missing from the ribs, it should be
replaced.(b) Check the fusible links and fuses for continuity.
Fusible link: ALT 80A
AM1 0.5G
AM2 30A
Fuse: ENGINE 10A
CHARGE 7.5A
IGN 7.5A
± CHARGING SYSTEMOn±Vehicle InspectionCH±3