fuse TOYOTA SIENNA 2007 Service User Guide

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–113
ES
(a) Remove the A/F fuse from the engine room junction
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the A/F fuse.
NG
OK
(a) Remove the A/F relay from the No. 6 engine room relay
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the A/F relay.
NG
OK
3INSPECT FUSE (A/F FUSE)
A162360E07
INSPECT FUSE (A/F FUSE)
4INSPECT RELAY (A/F RELAY)
B016200
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5Below 1
(Apply battery voltage between terminals 1 and 2)
REPLACE RELAY (A/F RELAY)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–121
ES
(a) Disconnect the H14 or H9 HO2 sensor connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage
(d) Reconnect the HO2 sensor connector.
OK
NG
(a) Remove the EFI No. 2 fuse from the engine room
junction block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the EFI No. 2 fuse.
NG
OK
2CHECK TERMINAL VOLTAGE (+B OF SENSOR)
A163150E01
Tester Connection Specified Condition
+B (H14-2) - Body ground 9 to 14 V
+B (H9-2) - Body ground 9 to 14 V
Go to step 5
3INSPECT FUSE (EFI NO. 2 FUSE)
A162360E08
REPLACE EFI NO. 2 FUSE

ES–1282GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the M6 MAF meter connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance :
Check for open
Check for short
(d) Reconnect the MAF meter connector.
(e) Reconnect the ECM connector.
NG
OK
(a) Remove the EFI No. 2 fuse from the engine room relay
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the EFI No. 2 fuse.
NG
OK
4CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)
A140709E07
Tester Connection Specified Condition
VG (M6-5) - VG (E9-30) Below 1
E2G (M6-4) - E2G (E9-29) Below 1
Tester Connection Specified Condition
VG (M6-5) or VG (E9-30) - Body ground 10 k
or higher
E2G (M6-4) or E2G (E9-29) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (MASS AIR FLOW METER -
ECM)
REPLACE MASS AIR FLOW METER (See page ES-504)
5INSPECT FUSE (EFI NO. 2 FUSE)
A162360E09
REPLACE EFI NO. 2 FUSE
REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - EFI RELAY)

ES–2962GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The stop light switch is a duplex system that transmits two signals: STP and ST1-. These two signals are
used by the ECM to monitor whether or not the brake system is working properly. If the signals, which
indicate the brake pedal is being depressed or released, are detected simultaneously, the ECM interprets
this as a malfunction in the stop light switch and sets the DTC.
HINT:
The normal conditions are as shown in the table below. The signals can be read using the intelligent
tester.
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during
"stop and go" driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and
the ECM stores the DTC. The vehicle must stop (less than 2 mph (3 km/h)) and go (19 mph (30 km/h) or
more) 5 times for two driving cycles in order to detect a malfunction.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
DTC P0504 Brake Switch "A" / "B" Correlation
DTC P0724 Brake Switch "B" Circuit High
Signals Brake Pedal Released In Transition Brake Pedal Depressed
STP OFF ON ON
ST1- ON ON OFF
DTC No. DTC Detection Condition Trouble Area
P0504Conditions (a), (b) and (c) continue for 0.5 seconds or
more (1 trip detection logic):
(a) Ignition switch in the ON position
(b) Brake pedal released
(c) STP signal OFF when ST1- signal OFF• Short in stop light switch signal circuit
• STOP fuse
• Stop light switch
•ECM
P0724The stop light switch remains ON even when the
vehicle is driven in a STOP (less than 2 mph (3 km/h))
and GO (19 mph (30 km/h) or more) fashion 5 times. (2
trip detection logic)• Short in stop light switch signal circuit
• Stop light switch
•ECM
Related DTCs P0724: Stop light switch/Rationality
Required sensors/Components Stop light switch, Vehicle speed sensor
Frequency of operation Continuous
Duration GO and STOP 5 times
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present None
Ignition switch ON
Starter OFF
Battery voltage 8 V or more
GO (Vehicle speed is 18.65 mph (30 km/h) or more) Once
STOP (Vehicle speed is less than 1.86 mph (3 km/h)) Once

ES–3162GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the
ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls
below a minimum level, these memories are cleared and the ECM determines that there is a malfunction
in the power supply circuit. When the engine is next started, the ECM illuminates the MIL and sets the
DTC.
HINT:
If DTC P0560 is set, the ECM does not store other DTCs.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
DTC P0560 System Voltage
DTC No. DTC Detection Condition Trouble Area
P0560Open in ECM back up power source circuit (1 trip
detection logic)• Open in back up power source circuit
• EFI No. 1 fuse
•ECM
Related DTCs P0560: ECM system voltage
Required Sensors / Components (Main) ECM
Required Sensors / Components (Related) -
Frequency of Operation Continuous
Duration 3 seconds
MIL Operation Immediate (MIL illuminated after next engine start)
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Stand-by RAM Initialized
ECM power source Less than 3.5 V
A118508E18

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–317
ES
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
(a) Remove the EFI No. 1 fuse from the engine room
junction block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the EFI No. 1 fuse.
NG
OK
(a) Measure the voltage according to the value(s) in the
table below.
Standard voltage
NG
OK
1CHECK FUSE (EFI NO. 1 FUSE)
A080011E09
REPLACE FUSE (EFI NO. 1 FUSE)
2INSPECT ECM (BATT VOLTAGE)
A162489E13
Tester Connection Specified Condition
BATT (E4-3) - E1 (E11-1) 9 to 14 V
Go to step 3
REPLACE ECM (See page ES-498)

ES–3182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Check the harness and the connector between the EFI
No. 1 fuse and ECM.
(1) Remove the EFI No. 1 fuse from the engine room
junction block.
(2) Disconnect the E4 ECM connector.
(3) Measure the resistance according to the value(s) in
the table below.
Standard resistance :
Check for open
Check for short
(4) Reconnect the ECM connector.
(5) Reinstall the EFI No. 1 fuse.
NG
OK
(a) Check the harness and the connector between the EFI
No. 1 fuse and battery.
(1) Remove the EFI No. 1 fuse from the engine room
junction block.
(2) Disconnect the negative battery cable.
(3) Measure the resistance according to the value(s) in
the table below.
Standard resistance:
Check for open
Check for short
(4) Reconnect the negative battery cable.
(5) Reinstall the EFI No. 1 fuse.
NG
OK
3CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)
A163382E02
Tester Connection Specified Condition
EFI No. 1 fuse (2) - BATT (E4-3) Below 1
Tester Connection Specified Condition
EFI No. 1 fuse (2) or BATT (E4-3) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - EFI NO. 1 FUSE)
4CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - BATTERY)
A163525E02
Tester Connection Specified Condition
Battery positive terminal - EFI No .1 fuse (1) Below 1
Tester Connection Specified Condition
Battery positive terminal or EFI No. 1 fuse (1) -
Body ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (EFI NO. 1 FUSE - BATTERY)

ES–3442GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)
is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the
ETCS and cuts off the current to the throttle actuator.
When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the
voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to
normal, turn the ignition switch off. The ECM then allows the current to flow to the throttle actuator so that
it can be restarted.
HINT:
The ETCS does not use a throttle cable.
MONITOR DESCRIPTION
The ECM monitors the battery supply voltage applied to the throttle actuator.
When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this
as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.
MONITOR STRATEGY
DTC P2118Throttle Actuator Control Motor Current Range
/ Performance
DTC No. DTC Detection Condition Trouble Area
P2118Open in ETCS power source (+BM) circuit (1 trip
detection logic)• Open in ETCS power source circuit
• ETCS fuse
•ECM
Related DTCs P2118: Throttle actuator power supply
Required Sensors / Components (Main) Throttle actuator, throttle valve, ETCS fuse
Required Sensors / Components (Related) None
Frequency of Operation Continuous
Duration 0.8 seconds
A085832E19

ES–3462GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
(a) Remove the ETCS fuse from the engine room junction
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the ETCS fuse.
NG
OK
(a) Measure the voltage according to the value(s) in the
table below.
Standard voltage
OK
NG
1CHECK FUSE (ETCS FUSE)
A080011E10
REPLACE FUSE (ETCS FUSE)
2INSPECT ECM (+BM VOLTAGE)
A162489E14
Tester Connection Specified Condition
+BM (E4-7) - E1 (E11-1) 9 to 14 V
CHECK FOR INTERMITTENT PROBLEMS

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–347
ES
(a) Check the harness and connector between the ETCS
fuse and ECM.
(1) Remove the ETCS fuse from the engine room
junction block.
(2) Disconnect the E4 ECM connector.
(3) Measure the resistance according to the value(s) in
the table below.
Standard resistance:
Check for open
Check for short
(4) Reconnect the ECM connector.
NG
OK
(a) Check the harness and connector between the ETCS
fuse and positive battery cable.
(1) Disconnect the negative battery cable.
(2) Measure the resistance according to the value(s) in
the table below.
Standard resistance:
Check for open
Check for short
(3) Reinstall the ETCS fuse.
(4) Reconnect the negative battery cable.
NG
OK
3CHECK HARNESS AND CONNECTOR (ECM - ETCS FUSE)
A163528E02
Tester Connection Specified Condition
ETCS fuse (2) - +BM (E4-7) Below 1
Tester Connection Specified Condition
ETCS fuse (2) or +BM (E4-7) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - ETCS FUSE)
4CHECK HARNESS AND CONNECTOR (ETCS FUSE - BATTERY)
A163529E02
Tester Connection Specified Condition
Positive battery cable - ETCS fuse (1) Below 1
Tester Connection Specified Condition
Positive battery cable or ETCS fuse (1) - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ETCS FUSE - BATTERY)
REPLACE ECM (See page ES-498)