Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 eg cip1130p
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DI-104
DIAGNOSTICS - ENGINE
DI4F6-02
DTC P1130 A/F Sensor Circuit Range/Performance Mal-
function
DTC P1150 A/F Sensor Circuit Range/Performance Mal-
function
CIRCUIT DESCRIPTION
Refer to DTC P0125 on Page DI-42 .
DTC No. DTC Detecting Condition Trouble 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 inside of ECM only.
S Open or short in A/F sensors (bank 1, 2 sensor 1) circuit
P1130 Voltage output* of A/F sensor does not change from 3.30 V,
S A/F sensors (bank 1, 2 sensor 1)
P1150 during engine running after engine is warmed up
S ECM
(2 trip detection logic)
*: Output value changes at the inside of the ECM only.
Open or short in A/F sensor circuit
(2 trip detection logic)
HINT:
S After confirming DTCs P1130 or P01150, 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 "CURRENT DATA".
S The A/F sensor's output voltage and the short-term fuel value can be read using the OBD II scan tool
or TOYOTA hand-held tester.
S The ECM controls the voltage of AFR/AFL and AFR/AFL 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.
S 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 on page DI-42 .
2001 SIENNA (RM787U)
Author : Date : 258
DI-105
DIAGNOSTICS - ENGINE
CONFIRMATION DRIVING PATTERN
Vehicle Speed
60 - 120 km/h (4)
(38 - 75 mph)
Idling (3)
IG SW OFF (1)(2)
3 - 5 min.
Time
A00364
(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:
S If DTC P1130 is displayed, check Bank 1 Sensor 1 circuit.
S If DTC P1150 is displayed, check Bank 2 Sensor 1 circuit.
S Read frame freeze 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, P1150) being output ?
YES Go to relevant DTC chart.
NO
2001 SIENNA (RM787U)
Author : Date : 259
DI-106
DIAGNOSTICS - ENGINE
2 Connect the OBDII scan tool or TOYOTA hand-held tester and read value for
voltage output of A/F sensors (bank1, 2 sensor1).
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3.
(b) Warm up the A/F sensors (bank1, 2 sensor1) with the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Read voltage of A/F sensors (bank 1, 2 sensor 1) on the screen of OBD II scan tool or TOYOTA hand-held
tester when you perform all the following conditions.
HINT:
The voltage of AFR and AFL terminals of ECM is fixed at 3.3 V and the voltage of AFR and AFL
terminals is fixed at 3.0 V. Therefore, it is impossible to check the A/F sensors (bank1, 2 sensor1) output
voltage at the terminals (AFR , AFL /AFR , AFL ) of ECM.
OK:
Condition A/F Sensor Voltage value
Engine idling
S Not remains at 3.30 V (*0.660 V)
Engine racing
S Not remains at 3.8 V (*0.76 V) or more
3 8 (*0 76
Driving at engine speed 1,500 rpm or more and vehicle S Not remains at 2.8 V (*0.56 V) or less
speed 40 km/h (25 mph) or more, and operate throttle *: When you use the OBD II scan tool (excluding TOYOTA hand-held tester)
valve open and close.
HINT:
S During fuel enrichment, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is
below 2.8 V (* 0.56 V), it is normal.
S During fuel cut, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is above 3.8
V (* 0.76 V), it is normal.
S If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.30 V (* 0.660 V) even after performing
all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may be open.
S If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.8 V (* 0.76V) or more, or 2.8 V (*0.56
V) or less even after performing all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may
be short.
*: When you use the OBD II scan tool (excluding TOYOTA hand-held tester).
OK Go to step 9.
NG
2001 SIENNA (RM787U)
Author : Date : 260
DI-107
DIAGNOSTICS - ENGINE
3 Check for open and short in harness and connector between ECM and A/F sen-
sors (bank 1, 2 sensor 1) (See page IN-31 ).
NG Repair or replace harness or connector.
OK
4 Check resistance of A/F sensor heater (See page SF-81 ).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF-1 ).
NG Repair or replace.
OK
6 Check fuel pressure (See page SF-21 ).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF-1 ).
OK
2001 SIENNA (RM787U)
Author : Date : 261
DI-108
DIAGNOSTICS - ENGINE
7 Check injector injection (See page SF-26 ).
NG Replace injector.
OK
Replace A/F sensors (bank1, 2 sensor1).
8 Perform confirmation driving pattern.
Go
9 Are there DTC P1130 and/or P1150 being output again ?
YES Check and replace ECM (See page IN-31 ).
NO
10 Did vehicle runs out of fuel in the past ?
NO Check for intermittent problems (See page
DI-3 ).
YES
DTC P1130 and /or P1150 is caused by running out of fuel.
2001 SIENNA (RM787U)
Author : Date : 262
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