TOYOTA CAMRY 1999 Service Repair Manual

N15969
35
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±359
2 Check main switch continuity.
PREPARATION:
(a) Remove steering wheel pad
(See Pub. No. RM654U on page SR±11).
(b) Disconnect the control switch connector.
CHECK:
Check continuity between terminals 3 and 5 of control switch
connector when main switch is held ON and OFF.
OK:
Switch positionTester connectionSpecified condition
OFF3 ± 5No continuity
Hold ON3 ± 5Continuity
NG Replace control switch.
OK
3 Check harness and connector between cruise control ECU and main switch
(See page IN±29).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±29).

I08465
Battery FL MAINB±G1
F9FL BLOCK
ALT1
F14 R±L
Instrument Panel J/B
2
1D
1K1
GAUGE
B±YIgnition Switch
4 IG1 AM1 2
W
B±RInstrument Panel J/B
1
1BAM12
1K CRUISE MAIN
Indicator Light
(in Combination Meter)
D DJ/CJ3
R±L10 7
C12 C12IE25
OODD
O J/CJ1
4
C16
Cruise Control ECU
PI DI±360
± DIAGNOSTICSCRUISE CONTROL SYSTEM
CRUISE MAIN Indicator Light Circuit
CIRCUIT DESCRIPTION
When the cruise control main switch is turned ON, CRUISE MAIN indicator light lights up.
WIRING DIAGRAM
DI090±20

AB0119
I00144
I00178
ON
PI
(±) (+)
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±361
INSPECTION PROCEDURE
1 Check voltage between terminals PI and GND of cruise control ECU connector.
PREPARATION:
Tun ignition switch ON.
CHECK:
Measure voltage between terminals PI and GND of cruise con-
trol ECU connector when main switch is ON and OFF.
OK:
Switch positionVoltage
OFF10 ± 16 V
ONBelow 1.2 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±328).
NG
2 Check combination meter (See page BE±1).
NG Replace combination meter.
OK
Check and replace cruise control ECU
(See page IN±29).

I00291
Cruise Control ECU
4
PI
5
TC O
LG±R D DJ/C
J/C
B
B B O
LG±R 10
4DLC2
IG3 11
C16
LG±R 11 DLC1
C16
J1
D2 D2
J2
D1LG±R DI±362
± DIAGNOSTICSCRUISE CONTROL SYSTEM
Diagnosis Circuit
CIRCUIT DESCRIPTION
This circuit sends a signal to the ECU that outputs DTC.
WIRING DIAGRAM
DI091±12

AB0119
I00169
I00179
ON
TC E1
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±363
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC2.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC2.
OK:
Voltage: 10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±328).
NG
2 Check harness and connector between cruise control ECU and DLC2, DLC2 and
body ground (See page IN±29).
NG Repair or replace harness or connector.
OK
Check and replace cruise control ECU
(See page IN±29).

DI±364
± DIAGNOSTICSCRUISE CONTROL SYSTEM
Actuator Control Cable
INSPECTION PROCEDURE
1 Actuator control cable inspection
OK:
(a) Check that the actuator and control cable throttle link are properly installed and that the cable and link
are connected correctly.
(b) Check that the actuator and bell crank operate smoothly.
(c) Check that the cable is not loose or too tight.
OK:
Freeplay: less than 10 mm
HINT:

If the control cable is very loose, the vehicle's loss of speed going uphill will be large.

If the control cable is too tight, the idle RPM will become high.
DI092±08

EC039±05
± EMISSION CONTROL (5S±FE)EMISSION CONTROL SYSTEM
EC±1
1399 Author: Date:
EMISSION CONTROL SYSTEM
PURPOSE
The emission control systems are installed to reduce the amount of HC, CO and NOx exhausted from the
engine ((3), (4) and (5)), to prevent the atmospheric release of blow±by gas±containing HC (1) and evapo-
rated fuel containing HC being released from the fuel tank (2).
The function of each system is shown in the following table.
SystemAbbreviationFunction
(1) Positive Crankcase Ventilation
(2) Evaporative Emission Control
(3) Exhaust Gas Recirculation
(4) Three±Way Catalytic Converter
(5) Sequential Multiport Fuel Injection*PCV
EVAP
EGR
TWC
SFIReduces HC
Reduces evaporated HC
Reduces NOx
Reduces HC, CO and NOx
Injects a precisely timed, optimum amount of fuel for reduced
exhaust emissions
Remark: * For inspection and repair of the SFI system, refer to the SFI section in this manual.

EC03A±03
B06542
PCV Valve
VSV for EGR
Front TWC
(California)EGR Vacuum Modulator
EGR Valve
TWC (Except California)
Rear TWC (California)
VSV for EVAP
Vent Line
Charcoal Canister
Fuel Tank
EVAP Line
Air Drain Hose
Filler Pipe
Air Inlet LinePurge Line Cutoff Valve
Fill Check Valve
EVAP Service Port
Fuel Tank Cap
VSV for Vapor
Pressure Sensor Vapor Pressure Sensor
EC±2
± EMISSION CONTROL (5S±FE)PARTS LAYOUT AND SCHEMATIC DRAWING
1400 Author: Date:
PARTS LAYOUT AND SCHEMATIC DRAWING
LOCATION

EC03B±03
B06549
VSV for EGR Front TWC
(California)EGR Vacuum Modulator
EGR
Valve
TWC (Except California)
Rear TWC (California)VSV
for EVAP
Vent Line
Charcoal CanisterFuel Tank EVAP Line
Air Drain HoseFiller Pipe
Air Inlet Line Purge LineEVAP Service Port
Fuel Tank Cap
Vapor
Pressure
SensorVSV for Vapor
Pressure Sensor
± EMISSION CONTROL (5S±FE)PARTS LAYOUT AND SCHEMATIC DRAWING
EC±3
1401 Author: Date:
DRAWING

EC03C±05
B01531
Clean Hose
Cylinder Head Side
B01532
Clean Hose
Intake
Manifold
Side
S01846
EC±4± EMISSION CONTROL (5S±FE)POSITIVE CRANKCASE VENTILATION (PCV)
SYSTEM
1402 Author: Date:
POSITIVE CRANKCASE
VENTILATION (PCV) SYSTEM
INSPECTION
1. INSPECT PCV VALVE
(a) Remove the PCV valve.
(b) Install a clean hose to the PCV valve.
(c) Inspect the PCV valve operation.
(1) Blow air into the cylinder head side, and check that
air passes through easily.
CAUTION:
Do not suck air through the valve. Petroleum substances
inside the valve are harmful.
(2) Blow air into the intake manifold side, and check
that air passes through with difficulty.
If operation is not as specified, replace the PCV valve.
(d) Remove the clean hose from the PCV valve.
(e) Reinstall the PCV valve.
2. INSPECT HOSES, CONNECTIONS AND GASKETS
Visually check for cracks, leaks or damage.