ignition TOYOTA CAMRY V20 1986 Service Information

HINT:
wRefer to 0/M for operation details of ANTI±THEFT SYSTEM.
wWhen the ID number has been cancelled, reset the same number after completing the operation, or in-
form the customer that it has been cancelled.ANTI±THEFT SYSTEM
operating condition.
(ID number input error 5
times) Take to designated
radio service station. While holding the 1, 4 and6
buttons in. Push and hold the
ºPVIIR VOLº knob. Check
display.
ANTI±THEFT SYSTEM
operating condition.
(ID number input error 4
times or less)
ANTI±THEFT SYSTEM not cancelled. ID number input 5 times or more?
Troubleshooting for ANTI±THEFT SYSTEM
Turn ignition key from LOCK position to ACC position.
ANTI±THEFT SYSTEM cancelled.
Check audio system again.
(Liquid Crystal Display (LCD) for Audio System)Cancel ID number, refer to each malfunction item.Cancel ID number, refer to each malfunction
item. Normal operation when radio
switch turned ON?
Take to designated radio service station.Refer to each malfunction
item.
ºSECº display disappears
after 1 second.ID number not input.
(Display D)
ID number not
input, or else
input error. After 2 seconds
Display C ± A Input ID number, check display.Forgot to press switch. Radio switch turned 4N. Display A showing?
Display B showing? ID nubmer is set.
Display A or BDisplay
EDisplay
B
Display DYe s
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± BODY ELECTRICAL SYSTEMAudio SystemBE±94

HINT: Back±up power refers to the storage voltage for
preset tuning. This is applied even when the ignition
switch is OFF.
Is there back±up power to connectors
behind radio?
Inspect antenna and antenna cable,
and replace as necessary. Check for short circuit in back±up
power source wife harness.Inspect and repair back±up power
wire harness.
Inspect and repair wire harness
for back±up power source.
Temporarily install another
antenna. Okay?Check that antenna plug is
secure in radio.Inspect antenna plug.
Does radio alone work?Reinsert plug. Okay?
Replace tape player.Check DOME fuse.Proceed to Test 3.
Proceed to Test 4. Insert properly.
Replace radio.Replace fuse.
Replace radio. Blows again
TEST 3
TEST 4TEST 2
Blown
Loose Short
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± BODY ELECTRICAL SYSTEMAudio SystemBE±97

Diagnosis System
OUTPUT OF DIAGNOSTIC CODES
1. READ TYPE A CODE
(a) Turn the ignition switch on.
(b) Turn the set/coast switch on, and keep it on.
(e) Push the main switch on.
(d) Turn the set/coast switch oft.
(e) Meet the conditions listed below.
(f) Read the diagnostic code on the main switch indica-
tor.
HINT:
wTo save time performing the next test, do not turn off the
ignition switch when steps (a) ± (f) are completed.
wChecking of No. 4 code is done with the vehicle jacked
up and the engine idling.
wIf there is no indication code, perform diagnosis ±and
inspection. (See page Be±74)
Each cancel switch on (Stop light switch,
Parking brake switch, Clutch switch,
Neutral start switch)Each cancel switch circuit is
normal.Set/coast switch circuit is
normal.
Vacuum switch circuit is
normal.Resume/ accel switch
circuit is normal.
Speed sensor circuit is
normal.Speed sensor circuit is
normal.
Drive 30 km/h 0 9 mph) or belowDrive 40 km/h (25 mph) or overResume/accel switch on Set/coast switch on
Vacuum switch on
Indication code ConditionsDiagnosisNo.
± BODY ELECTRICAL SYSTEMCruise Control SystemBE±71

2. READ TYPE 6 CODE
(a) If while driving with the cruise control on, the system is
cancelled by a malfunction in either the actuator, speed
sensor, or control switch circuit, the main switch indicator
will blink 5 times.
(b) While driving at a speed of 16 km/h (10 mph) or less,
press the SET/COAST switch three times in two
seconds.
HINT: In order to retain the diagnostic code when a ma
function has occurred, always inspect with the ignition
and main switches on.
Should the power be cut, the diagnostic code will be
erased from the computer memory.
(e) Read the diagnostic code on the main switch indicator.
HINT:
wIndication codes appear in order from No. 11.
wIndication is stopped when vehicle speed is over 16
km/h (10 mph) or main switch is turned off.
wIf there is no indication code, perform diagnosis and in-
spection. (See page BE±74)
* If the set speed can be maintained when the speed control switch is again set at SET/COAST, there is no malfunction.*Vehicle speed decreases to 16 km/h (14 mph)
or more below set speed.
Resume/accel switch and set/coast switch
circuit is abnormal.Resume/accel switch circuit is abnormal.Speed sensor signal circuit is abnormal. Actuator circuit is abnormal. Indication code
Diagnosis
Normal.
± BODY ELECTRICAL SYSTEMCruise Control SystemBE±72

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

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
COMPUTERYe s
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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 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