Page 2569 of 4770

± DIAGNOSTICSENGINE (5S±FE)
DI±149
384 Author: Date:
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 warmed up or not, the air±fuel ratio lean or rich, etc.
at the time of the malfunction.
1 Check idle speed.
PREPARATION:
(a) Warm up the engine to normal operating temperature.
(b) Switch off all the accessories.
(c) Switch off the air conditioning.
(d) Shift the transmission into N or neutral position.
(e) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3 on the vehicle.
(f) Using SST, connect terminals TE1 and E1 of the DLC1.
CHECK:
Check the difference of engine speed between the ones less than 5 sec. and more than 5 sec. after connect-
ing terminals TE1 and E1 of the DLC1.
OK:
Difference of engine speed: More than 100 rpm
OK Go to step 6.
NG
Page 2570 of 4770
A00416
A03022A03426
E9 Connector
RSC(+) RSO(+)
E9 Connector
RSO(+)
RSC(+) w/o Immobiliser
w/ Immobiliser
DI±150
± DIAGNOSTICSENGINE (5S±FE)
385 Author: Date:
2 Check voltage between terminals RSO, RSC of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Disconnect the E9 connector of the ECM.
(c) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals RSO, RSC of the ECM
connector and body ground,
OK:
Voltage: 9 ~ 14 V
OK Go to step 4.
NG
3 Check IAC valve (See page SF±35).
NG Replace IAC valve.
OK
Check for open and short in harness and connector between engine room J/B No.2 and IAC valve,
and IAC valve and ECM (See page IN±31).
Page 2571 of 4770
± DIAGNOSTICSENGINE (5S±FE)
DI±151
386 Author: Date:
4 Check operation of IAC valve (See page SF±35).
NG Repair or replace IAC valve.
OK
5 Check blockage of IAC valve and passage to bypass throttle valve.
NG Repair or replace IAC valve.
OK
Check and replace ECM (See page IN±31).
6 Check for A/C signal circuit (See page AC±84).
NG Repair or replace.
OK
Check air induction system
(See page SF±1).
Page 2572 of 4770

DI±152
± DIAGNOSTICSENGINE (5S±FE)
387 Author: Date:
DTC P1130 A/F Sensor Circuit Range/Performance
Malfunction (Only for California Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±61.
DTC No.DTC Detecting ConditionTrouble Area
Voltage output* of A/F sensor remains at 3.8 V or more, or 2.8
V or less, during engine running after engine is warmed up (2
trip detection logic)
*: Output value changes at the inside of ECM only
P1130Voltage output* of A/F sensor does not change from 3.30 V,
during engine running after engine is warmed up
(2 trip detection logic)
*: Output value changes at inside of ECM onlyOpen or short in A/F sensor circuit
A/F sensor
ECM
Open or short in A/F sensor circuit
(2 trip detection logic)
HINT:
After confirming DTC P1130, use the OBD II scan tool or TOYOTA hand-held tester to confirm voltage
output of A/F sensor (AFS B1 S1 / O2S B1 S1) from the CURRENT DATA.
The A/F sensor's output voltage and the short-term fuel trim value can be read using the OBD II scan
tool or TOYOTA hand-held tester.
The ECM controls the voltage of AF and AF terminals of ECM to the fixed voltage. Therefore, it
is impossible to confirm the A/F sensor output voltage without OBD II scan tool or TOYOTA hand±held
tester.
OBD II scan tool (excluding TOYOTA hand-held tester) displays the one fifth of the A/F sensor output
voltage which is displayed on the TOYOTA hand-held tester.
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±61.
DI01D±06
Page 2573 of 4770

A00364
Vehicle Speed
60 ~ 120 km/h
(38 ~ 75 mph)
Idling
IG SW OFF
3 ~ 5 min.
Time
(1)(2)(4)
(3)
± DIAGNOSTICSENGINE (5S±FE)
DI±153
388 Author: Date:
CONFIRMATION DRIVING PATTERN
(1) Connect the TOYOTA hand±held tester to the DLC3.
(2) Switch the TOYOTA hand±held tester from normal mode to 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 warmed up or not, the air±fuel ratio 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
Page 2574 of 4770

DI±154
± DIAGNOSTICSENGINE (5S±FE)
389 Author: Date:
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 at 2,500 rpm for approx. 90 sec.
CHECK:
Read 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 AF terminal of ECM is 3.3 V fixed and 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 ECM.
OK:
ConditionA/F Sensor Voltage Value
Engine idling
Engine racingNot remains at 3.30 V (* 0.660 V)
Not remains at38V(*0 76 V) or moreDriving at engine speed 1,500 rpm or more and vehicle
speed 40 km/h (25 mph) or more, and operate throttle valve
open and closeNot remains at 3.8 V (* 0.76 V) or more
Not remains at 2.8 V (* 0.56 V) or less
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester)
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 output voltage of the A/F sensor is above 3.8 V (* 0.76 V), it
is normally.
If output voltage of the A/F sensor remains at 3.30 V (* 0.660 V) even after performing all the above
conditions, A/F sensor circuit may be open.
If output voltage of the A/F sensor remains at 3.8 V (* 0.76 V) or more, or 2.8 V (* 0.56 V) or less even
after performing all the above conditions, A/F sensor circuit may be short.
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester).
OK Go to step 9.
NG
3 Check for open and short in harness and connector between ECM and A/F sen-
sor (See page IN±31).
NG Repair or replace harness or connector.
OK
Page 2575 of 4770
± DIAGNOSTICSENGINE (5S±FE)
DI±155
390 Author: Date:
4 Check resistance of A/F sensor heater (See page SF±59).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF±1).
NG Repair or replace.
OK
6 Check EGR system (See page EC±12).
NG Repair EGR system.
OK
7 Check fuel pressure (See page SF±6).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
Page 2576 of 4770
DI±156
± DIAGNOSTICSENGINE (5S±FE)
391 Author: Date:
8 Check injector injection (See page SF±23).
NG Replace injector.
OK
Replace A/F sensor.
9 Perform confirmation driving pattern (See page DI±152).
Go
10 Is there DTC P1130 being output again?
YES Check and replace ECM.
NO
11 Did vehicle runs out of fuel in the past?
NO Check for intermittent problems.
YES
DTC P0125 is caused by running out of fuel.