TOYOTA SIENNA 2007 Service Repair Manual

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–455
ES
INSPECTION PROCEDURE
(a) Check that the Malfunction Indicator Lamp (MIL) lights
up when turning the ignition switch to the ON position.
OK:
MIL lights up.
OK
NG
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Check the communication between the tester and ECM.
Result
A
B
(a) Disconnect the throttle body connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the throttle body connector.
A
B
(a) Disconnect the accelerator pedal position sensor
connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
1CHECK MIL
GO TO MIL CIRCUIT (See page ES-478)
2CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM
Result Proceed to
Communication is possible A
Communication is not possible B
GO TO MIL CIRCUIT (See page ES-478)
3CHECK THROTTLE BODY (CHECK MIL ILLUMINATED)
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE THROTTLE BODY (See page ES-
493)
4CHECK ACCELERATOR PEDAL ROD (CHECK MIL ILLUMINATED)

ES–4562GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
Result
(d) Reconnect the accelerator pedal position sensor
connector.
A
B
(a) Disconnect the VVT sensor for intake camshaft bank 1
connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the VVT sensor for intake camshaft bank 1
connector.
A
B
(a) Disconnect the VVT sensor for exhaust camshaft bank 1
connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the VVT sensor for exhaust camshaft bank 1
connector.
A
B
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE ACCELERATOR PEDAL ROD (See
page ES-502)
5CHECK VVT SENSOR FOR INTAKE CAMSHAFT BANK 1 (CHECK MIL ILLUMINATED)
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE VVT SENSOR FOR INTAKE
CAMSHAFT BANK 1 (See page ES-509)
6CHECK VVT SENSOR FOR EXHAUST CAMSHAFT BANK 1 (CHECK MIL ILLUMINAT E D )
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE VVT SENSOR FOR EXHAUST
CAMSHAFT BANK 1 (See page ES-509)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–457
ES
(a) Disconnect the VVT sensor for intake camshaft bank 2
connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the VVT sensor for intake camshaft bank 2
connector.
A
B
(a) Disconnect the VVT sensor for exhaust camshaft bank 2
connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the VVT sensor for exhaust camshaft bank 2
connector.
A
B
(a) Disconnect the canister pump module connector.
(b) Turn the ignition switch to the ON position.
(c) Check the MIL.
Result
(d) Reconnect the canister pump module connector.
A
7CHECK VVT SENSOR FOR INTAKE CAMSHAFT BANK 2 (CHECK MIL ILLUMINATED)
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE VVT SENSOR FOR INTAKE
CAMSHAFT BANK 2 (See page ES-509)
8CHECK VVT SENSOR FOR EXHAUST CAMSHAFT BANK 2 (CHECK MIL ILLUMINAT E D )
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE VVT SENSOR FOR EXHAUST
CAMSHAFT BANK 2 (See page ES-509)
9CHECK CHARCOAL CANISTER ASSEMBLY (CHECK MIL ILLUMINATED)
Result Proceed to
MIL illuminates A
MIL does not illuminate B
REPLACE CHARCOAL CANISTER
ASSEMBLY (See page EC-8)

ES–4582GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
B
(a) Disconnect the throttle body connector.
(b) Disconnect the accelerator pedal position sensor
connector.
(c) Disconnect the VVT sensor for intake camshaft bank 1
connector.
(d) Disconnect the VVT sensor for exhaust camshaft bank 1
connector.
(e) Disconnect the VVT sensor for intake camshaft bank 2
connector.
(f) Disconnect the VVT sensor for exhaust camshaft bank 2
connector.
(g) Disconnect the canister pump module connector.
(h) Disconnect the E9 and E4 ECM connectors.
(i) Measure the resistance according to the value(s) in the
table below.
Standard resistance (Check for short)
(j) Reconnect the ECM connectors.
(k) Reconnect the canister pump module connector.
(l) Reconnect the VVT sensor for exhaust camshaft bank 2
connector.
(m) Reconnect the VVT sensor for intake camshaft bank 2
connector.
(n) Reconnect the VVT sensor for exhaust camshaft bank 1
connector.
(o) Reconnect the VVT sensor for intake camshaft bank 1
connector.
(p) Reconnect the accelerator pedal position sensor
connector.
(q) Reconnect the throttle body connector.
NG
OK
10CHECK HARNESS AND CONNECTOR
A162963E01
Tester Connections Specified Conditions
VC (E9-23) - Body ground 10 k
or higher
VCPA (E4-26) - Body ground 10 k
or higher
VCP2 (E4-27) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE ECM (See page ES-498)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–459
ES
DESCRIPTION
The FUEL PUMP relay switches the fuel pump speed according to the engine conditions. The fuel pump
operates when the ECM receives the starter-operating signal (STA) and crankshaft-rotating signal (NE).
The FUEL PUMP relay is turned ON while the engine is idling or operating at low load. This causes
current to flow through the fuel pump resistor to the fuel pump. The fuel pump then operates at low speed.
The FUEL PUMP relay is turned OFF while the engine is cranking or operating at high load. The fuel
pump then operates at normal speed.
Fuel Pump Control Circuit
A165826E01

ES–4602GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Check if there is pressure in the fuel inlet hose.
HINT:
If there is fuel pressure, the sound of fuel flowing will be
heard.
1CHECK FUEL PUMP
A162641E03

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–461
ES
OK
NG
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
intelligent tester or the OBD II scan tool main switch on.
(c) Enter the following menus: DIAGNOSIS / ENHANCED
OBD II / ACTIVE TEST / FUEL PUMP / SPD.
(d) Check the relay operation while operating it using the
intelligent tester.
Standard:
Operating noise can be heard from the relay.
OK
NG
(a) Remove the C/OPN relay from the engine room junction
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the C/OPN relay.
NG
OK
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the
table below.
Standard voltage
OK Go to step 14
2PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE C/OPN RELAY)
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(See page ES-27)
3INSPECT RELAY (C/OPN 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 (C/OPN RELAY)
4INSPECT ECM (FC VOLTAGE)
A162489E12
Tester Connection Specified Condition
E4-10 (FC) - E11-1 (E1) 9 to 14 V
Go to step 8

ES–4622GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NG
(a) Disconnect the E4 ECM connector.
(b) Remove the C/OPN relay from the engine room junction
block.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Check for open
Check for short
(d) Reconnect the ECM connector.
(e) Reinstall the C/OPN relay.
NG
OK
(a) Remove the IGN fuse from the driver side junction block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the IGN fuse.
NG
OK
5CHECK HARNESS AND CONNECTOR (ECM - C/OPN RELAY)
A163319E02
Tester Connection Specified Condition
FC (E4-10) - C/OPN terminal (1) Below 1
Tester Connection Specified Condition
FC (E4-10) or C/OPN terminal (1) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - C/OPN RELAY)
6CHECK FUSE (IGN FUSE)
A080034E04
REPLACE FUSE (IGN FUSE)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–463
ES
(a) Reconnect the I15 ignition switch connector.
(b) Remove the C/OPN relay from the engine room junction
block.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Check for open
Standard resistance:
Check for short
(d) Reconnect the ignition switch connector.
(e) Reinstall the C/OPN relay.
NG
OK
NG
OK
(a) Remove the fuel pump relay from the engine room
junction block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the fuel pump relay.
7CHECK HARNESS AND CONNECTOR (C/OPN RELAY - IGNITION SWITCH)
A122510E03
Tester Connection Specified Condition
IG2 (I15-6) - C/OPN terminal (2) Below 1
Tester Connection Specified Condition
IG2 (I15-6) or C/OPN terminal (2) - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (C/OPN RELAY - IGNITION
SWITCH)
8CHECK ECM POWER SOURCE CIRCUIT
REPAIR OR REPLACE ECM POWER
SOURCE CIRCUIT
9INSPECT RELAY (FUEL PUMP RELAY)
A137690
Tester connection Specified Condition
3 - 4 Below 1
3 - 5 10 k or higher
3 - 410 k
or higher
(When battery voltage is applied to terminals 1 and
2)
3 - 5Below 1
(When battery voltage is applied to terminals 1 and
2)

ES–4642GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NG
OK
(a) Measure the resistance of the fuel pump.
(1) Measure the resistance according to the value(s) in
the table below.
Standard resistance
(b) Check operation of the fuel pump.
(1) Apply battery voltage to both terminals. Check that
the pump operates.
NOTICE:
• These tests must be done quickly (within 10
seconds) to prevent the coil from burning
out.
• Keep the fuel pump as far away from the
battery as possible.
• Always turn ON and OFF the voltage on the
battery side, not on the fuel pump side.
NG
OKREPLACE RELAY (FUEL PUMP RELAY)
10INSPECT FUEL PUMP
A074356E31
Tester Connection Condition Specified Condition
4 - 5 20
C (68F) 0.2 to 0.3
REPLACE FUEL PUMP ASSEMBLY (See
page FU-30)