1999 TOYOTA CAMRY Service Repair Manual

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Page 2225 of 4592

TOYOTA CAMRY 1999 Service Repair Manual BE6653A01553A01584
ON
2
(±)(+)
DI±74
± DIAGNOSTICSENGINE
3 Check operation of IAC valve (See page SF±22).
NG Go to step 5.
OK
4 Check blockage of IAC valve and passage to bypass throttle valve.
NG

Page 2226 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSENGINE
DI±75
OK
7 Check for open and short in harness and connector in RSD circuit.
NG Repair or replace.
OK
Replace IAC valve.
8 Check for A/C signal circuit (See Pub. No. RM654U, page

Page 2227 of 4592

TOYOTA CAMRY 1999 Service Repair Manual 1 msec. /Division 5 V /Division
GND
A09303BE6653
A09648
ON
RSD
(±) (+)
DI±76
± DIAGNOSTICSENGINE
OK Go to step 8.
NG
2 Check for IAC duty signal.
PREPARATION:
(a) Warm up the engine normal operatin

Page 2228 of 4592

TOYOTA CAMRY 1999 Service Repair Manual BE6653A01553A01584
ON
2
(±)(+)
± DIAGNOSTICSENGINE
DI±77
NG
4 Check voltage between terminal 2 of IAC valve connector and body ground.
PREPARATION:
(a) Disconnect the IAC valve connector.
(b) Turn

Page 2229 of 4592

TOYOTA CAMRY 1999 Service Repair Manual DI±78
± DIAGNOSTICSENGINE
NG Repair or replace.
OK
Replace IAC valve.
8 Check blockage of IAC valve and the passage to bypass throttle valve.
NG Repair or replace IAC valve and throttle body.
OK
9 C

Page 2230 of 4592

TOYOTA CAMRY 1999 Service Repair Manual A00364
Vehicle Speed
60 ± 120 km/h
(38 ± 75 mph)
Idling
IG SW OFF
3 ± 5 min.
Time
(1)(2)(4)
(3)
± DIAGNOSTICSENGINE
DI±79
DTC P1130 A/F Sensor Circuit Range/Performance Mal-
function (Bank 1 Sens

Page 2231 of 4592

TOYOTA CAMRY 1999 Service Repair Manual DI±80
± DIAGNOSTICSENGINE
(1) Connect the TOYOTA hand±held tester to the DLC3.
(2) Switch the TOYOTA hand±held tester from the normal mode to the check mode (See page
DI±3).
(3) Start the engin

DI±80
± DIAGNOSTICSENGINE
(1) Connect the TOYOTA hand±held tester to the DLC3.
(2) Switch the TOYOTA hand±held tester from the normal mode to the check mode (See page
DI±3).
(3) Start the engine and warm it up with all accessory switches OFF.
(4) Drive the vehicle at 60 ± 120 km/h (38 ± 75 mph) and engine speed at 1,600 ± 3,200 rpm for 3
- 5 min.
HINT:
If a malfunction exists, the MIL will light up during step (4).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a TOYOTA hand±held tester, turn the ignition switch OFF after performing steps
(3) and (4), then perform steps (3) and (4) again.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected. When troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not, the air±fuel ratio was lean
or rich, etc. at the time of the malfunction.
1 Are there any other codes (besides DTC P1130) being output?
YES Go to relevant DTC chart.
NO
2 Connect OBD II scan tool or TOYOTA hand±held tester, and read value for volt-
age output of A/F sensor.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(b) Warm up the A/F sensor with the engine speed at 2,500 rpm for approx. 90 sec.
CHECK:
Read the voltage value of the A/F sensor on the screen of OBD II scan tool or TOYOTA hand±held tester
when you perform all the following conditions.
HINT:
The voltage of the AF+ terminal of the ECM is 3.3 V fixed and the AF± terminal is 3.0 V fixed. Therefore,
it is impossible to check the A/F sensor output voltage at the terminals (AF+/AF±) of the ECM.
OK:
ConditionA/F Sensor Voltage Value
Engine idling
Engine racingNot remains at 3.30 V (0.660 V*)
Driving at engine speed 1,500 rpm or more and vehicle
speed 40 km/h (25 mph) or more, and operate throttle valve
open and close
Not remains at 3.30 V (0.660 V)
Not remains at 4.5 V (0.76 V*) or more
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester)

Page 2232 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSENGINE
DI±81
HINT:
During fuel enrichment, there is a case that the output voltage of the A/F sensor is below 2.8 V (0.56
V*), it is normal.
During fuel cut, there is a case that the

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