TOYOTA CAMRY V20 1986 Service Information

Setting speed does not cancel when shifted to ºNº
range (A/T only).Setting speed does not cancel when parking brake
pulled up.Vehicle speed does not decrease when coast switch
turned on.
Setting speed does not cancel when clutch pedal
depressed (M/T only).Vehicle speed does not return to memorized speed
when resume switch turned on.
Setting speed does not cancel when brake pedal
depressed.Vehicle speed fluctuates when set switch turned on.
Cruise control will not disengage even about
40 km/h (25 mph).Vehicle speed does not accelerate when accel
switch turned on.
A short period after the O/D cut, (Approx.
within 14 seconds) the O/D wilt resume. Speed can be set below about 40 km/h (25 mph).Inspect No.5 of type A code.
Inspect No.6 of type A code. Return and acceleration response is sluggish.
Troubleshooting
Setting speed deviates on high side.
Setting speed deviates on low side.
Inspect No.4 of type A code. Cruise control does not operate.
Inspect No.4 of type A code.Inspect No. 1 of type A code.
Inspect No.4 of type A code.
Inspect No.4 of type A code.Inspect No.3 of type A code.Inspect No.2 of type A code.(a) Inspect type A
codes.
(e) All codes are normal.(b) Inspect type6 codes.Inspection item
ProblemNo.
± BODY ELECTRICAL SYSTEMCruse Control SystemBE±73

wShort circuit in wire harness between ECU±IG
fuse and terminal 3 of main switch.
wInspect main switch.
(See page
BE±89)
INSPECT SWITCH OPERATION
Is there battery voltage between terminal 4 and
body ground with main switch turned on ? INSPECT POWER SOURCE
Is there battery voltage between terminal 3 and
body ground?
INSPECT INDICATOR LIGHT OPERATION
Connect terminal i to body ground. Does indicator light
light with main switch turned on?
wOpen circuit in wire harness between terminal 5
of main switch and body ground.
wBody ground faulty.
INSPECT GROUND CONNECTION
Is there continuity between terminal 5 and
body ground?
Is there battery voltage between terminal 4 and body
ground with main switch turned off?Open circuit in wire harness between ECU±IG fuse and
terminal 3 of main switch.
INSPECTION OF POWER SOURCE CIRCUIT
No
CONTINUED ON PAGE BE±75 Does indicator light light with main switch turned off?Inspect main switch.
(See page BE±89) Inspect main switch.
(See page BE±89)
Inspect main switch.
(See page BE±89)
Inspect main switch.
(See page BE±89) Replace fuse.
Is operation normal? Turn ignition switch on.
Is ECU±IG fuse normal?
MAIN SWITCHFuse faulty
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±74

wOpen circuit in wire harness betweeh terminal 13 and body
ground.
wBody ground faulty.
INSPECT INDICATOR LIGHT CIRCUIT
Connect terminal 3 to body ground.
Does indicator light light with main switch turned on?
INSPECT GROUND CONNECTION.
Is there continuity between terminal 13 and
body ground?
INSPECT POWER SOURCE
Is there battery voltage between terminal 10 and body
ground with main switch turned on?
Disconnect connector from control switch.
Is there continuity between terminal 3 and body
ground?Open circuit in wire harness between terminal 3
of computer and terminal 1 of main switch. Open circuit in wire harness between terminal 10
of computer and terminal 4 of main switch.
Short circuit in wire harness between terminal 3
of computer and terminal 1 of main switch. Disconnect connector from computer and inspect
connector on wire harness side as follows.
CONTINUED ON PAGE BE±74
Replace computer.
COMPUTER
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±75

INSPECT GROUND CONNECTION .
Disconnect connector from control switch.
Is there continuity between terminal 16 of wire
harness side connector and body ground?
INSPECT SET/COAST SWITCH OPERATION
Is set/coast switch operation normal?
(See page BE±89)w
Open circuit in wire harness between terminal
16 and body ground.
wBody ground f aulty.
INSPECT SET/COAST SWITCH CIRCUIT
Is there continuity between terminal 5 and body
ground with set/coast switch turned on?Open or short circuit in wire harness between
terminal 5 of computer and terminal 5 of control
switch.
INSPECTION OF SET/COAST SWITCH CIRCUIT
Disconnect connector from computer and inspect
connector on wire harness side as follows.
Connect connector to control switch.
Turn ignition switch off.
Replace control switch.
Replace computer.
COMPUTERCONTROL SW
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±76

INSPECT GROUND CONNECTION
Disconnect connector from control switch.
Is there continuity between terminal 16 of wire
harness side connector and body ground?
INSPECT RESIlME/ACCEL SWITCH OPERATION
Is resume/accel switch operation normal?
(See page BE±89)wOpen circuit in wire harness between terminal 16
and body ground.
wBody ground faulty.
INSPECT RESUME/ACCEL SWITCH CIRCUIT
Is there continuity between terminal 17 and body
ground with resume/accel switch turned on?Open or short circuit in wire harness between terminal
17 of computer and terminal 17 of control switch.
INSPECTION OF RESUME/ACCEL SWITCH CIRCUIT
Disconnect connector from computer and inspect
connector on wire harness side as follows. Connect connector to control switch.Turn ignition switch off.
Replace control switch.
Replace computer.
CONTROL SW
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±77

INSPECT STOP LIGHT SWITCH CIRCUIT
Disconnect connector from stop light switch.
Is there continuity between terminal 4 of wire
harness side connector and body ground?
INSPECT STOP LIGHT SWITCH OPERATION
Is stop light switch operation normal?
(See page BE±89) INSPECT ACTUATOR OPERATION
Disconnect connector from actuator.
Is actuator operation normal?
(See page BE±91)
Connect the connector to actuator.
Is there continuity between terminal 4 of wire
harness side connector and body ground?Open circuit in wire harness between terminal 1 of
actuator and terminal 4 of stop light switch.Short circuit in wire harness between terminal 1 of
actuator and terminal 4 of stop light switch. INSPECT CABLE FREEPLAY
Is control Cable freeplay less than 10 mm (0.39 in)?Are there cracks or other damage on the vacuum
hose?
INSPECTION OF ACTUATOR CIRCUIT
Connect connector to stop light switch.
CONTINUED ON PAGE
BE±79
Adjust control cable freeplay.
Replace stop light switch. Turn ignition switch off.
Replace vacuum± hose.
VACUUM HOSE
STOP LIGHT SW
Replace actuator.
ACTUATOR
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±78

INSPECT STOP LIGHT SWITCH CIRCUIT
Is there continuity between terminals 2 and
14 with stop light switch released?
Short circuit in wire harness± between terminals
2 and 14 of computer.Open circuit in wire harness between terminals
2 and 14 of computer. Disconnect connector from computer and inspect
connector on wire harness side as follows.
Open circuit in wire harness between terminals
4 and 14 of computer. Is there continuity between terminals 2 and
14 with stop light switch depressed?
Is there continuity between terminals 4 and
14?
CONTINUED ON PAGE
BE±78
Replace computer.
COMPUTER
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±79

INSPECT GROUND CONNECTION
Disconnect connector from meter (speed sen-
sor). Is there continuity between terminal B of
wire harness side connector and body ground?
INSPECT SPEED SENSOR CIRCUIT
Disconnect connector from computer.
Is there continuity between terminal A of wire harness
side connector and terminal 7 of computer?INSPECT SPEEDOMETER CABLE
Does the meter fluctuate when driving at a steady
speed?
INSPECT SPEED SENSOR OPERATION
Is speed sensor operation normal?
(See page BE±90)
Open circuit in wire harness between terminal A
of speed sensor and terminal 7 of computer.
Open circuit in wire harness between termi-
nal B and body ground.
INSPECTION OF SPEED SENSOR CIRCUIT
SPEEDOMETER CABLE
Turn ignition switch off.
Speed sensor faulty.
SPEED SENSOR
Meter cable faulty.
Replace computer.
COMPUTERYe s
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±80

INSPECT GROUND CONNECTION
Disconnect connector from stop light switch.
Is there continuity between terminal 3 of wire
harness side connector and body ground?wOpen circuit in wire harness between terminal 3
and body ground.
wBody ground faulty.
INSPECT STOP LIGHT SWITCH OPERATION
Is stop light switch operation normal?
(See page BE±89)
INSPECT STOP FUSE CIRCUIT
Is there battery voltage between terminal 16 and body
ground with brake pedal released?
INSPECT STOP LIGHT SWITCH CIRCUIT
Is there battery voltage between terminal 15 and body
ground with brake pedal depressed?Short circuit in wire harness between terminal
16 of computer or terminal 1 of stop light
switch and fuse.
Open circuit in wire harness between terminal 16 of
computer and STOP fuse.
Open circuit in wire harness between terminal 15 of
computer and terminal 3 of stop light switch. Disconnect connector from computer and inspect
connector on wire harness side as follows.
INSPECTION OF STOP LIGHT SWITCH CIRCUIT
Connect connector to stop light switch.Replace fuse.
Is operation normal?
Replace stop light switch. Turn ignition switch off.
Is STOP fuse normal?
Replace computer.
STOP LIGHT SW
COMPUTER
Fuse faulty. Ye s
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±81

INSPECT PARKING BRAKE SWITCH OPERATION
Disconnect connector from parking brake switch.
Is parking brake switch operation normal? (See page
BE±90) INSPECT GROUND CONNECTION
Disconnect connector from brake level warning switch.
Is there continuity between terminal 2 of wire harness side
connector and body gronud?
Short circuit in wire harness between terminal 12 of
computer and terminal 1 of parking brake switch,
terminal 1 of brake fluid level warning switch or terminal
2 of alternator. INSPECT BRAKE WARNING SWITCH
Is brake fluid level warning switch operation nomal?
(See page BE±38)
wOpen circuit in wire harness between terminal 2
and body ground.
wBody ground faulty.
INSPECTION OF PARKING BRAKE SWITCH CIRCUIT
Is there no voltage between terminal 12 and body ground
with parking brake pulled up?
!s there battery voltage between terminal 12 and body
ground with parking brake released? Disconnect connector from computer and inspect connector
on wire harness side as follows.
Open circuit in wire harness between terminal 12 of
computer and terminal of parking brake switch. INSPECT ALTERNATOR OPERATION
is alternator operation normal? (See page CH±4)
Remove CHARGE fuse and ignition switch tuned on. Connect the connector to brake warning switch.
Connect connector to parking brake switch.
BRAKE FLUID LEVEL
WARNING SWITCH
Replace brake warning switch.
Replace parking brake switch.
PARKING BRAKE SWITCH
Turn ignition switch off.
Replace computer.Replace alternator.
ALTERNATOR
COMPUTER
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± BODY ELECTRICAL SYSTEMCruise Control SystemBE±82