engine TOYOTA SIENNA 2007 Service Repair Manual

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–437
ES
(a) Turn the ignition switch off.
(b) Disconnect the C27 canister connector.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage between terminal 9 of the canister
connector and body ground.
Result
(e) Reconnect the canister connector.
B
A
(a) Turn the ignition switch off.
(b) Disconnect the C27 canister connector.
(c) Apply the battery voltage to terminals 9 and 8 of the
pump module.
(d) Touch the pump module to confirm the vent valve
operation.
Result
(e) Reconnect the canister connector.
A
B
21INSPECT PUMP MODULE (POWER SOURCE FOR VENT VALVE)
A165552E01
Test Result Suspected Trouble Area Proceed to
Between 9 V and 14 V - A
Between 0 V and 3 VPower source wire harness
of vent valveB
Go to step 32
22INSPECT PUMP MODULE (VENT VALVE OPERATION)
A096743E08
Test Result Suspected Trouble Area Proceed to
OperatingWire harness between vent
valve and ECMA
Not operating Vent valve B
Go to step 32
Go to step 30

ES–4382GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Select the following menu items on the tester:
DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST /
VACUUM PUMP.
(b) Measure the voltage between terminal MPMP of the
ECM connector and body ground when the vacuum
pump is turned ON and OFF using the tester.
Result
B
A
(a) Turn the ignition switch off.
(b) Disconnect the C27 canister connector.
(c) Turn the ignition switch to the ON position.
(d) Select the following menu items on the tester:
DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST /
VACUUM PUMP.
(e) Turn the vacuum pump ON.
(f) Measure the voltage between terminal 1 of the canister
connector and body ground.
Result
(g) Reconnect the canister connector.
B
23PERFORM ACTIVE TEST BY INTELLIGENT TESTER (FOR PUMP MODULE (VACUUM
PUMP))
A162489E08
Test Result Suspected Trouble Area Proceed to
Between 0 V and 3 V when
OFF
Between 9 V and 14 V when
ON-A
Between 9 V and 14 V when
OFF
Between 0 V and 3 V when
ONECM B
Go to step 35
24CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM)
A165552E01
Test Result Suspected Trouble Area Proceed to
Between 9 V and 14 V - A
Between 0 V and 3 VWire harness between ECM
and vacuum pumpB
Go to step 32

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–439
ES
A
(a) Disconnect the C27 canister connector.
(b) Turn the ignition switch off.
(c) Check the resistance between terminal 6 of the canister
connector and body ground.
Result
(d) Reconnect the canister connector.
A
B
(a) Stop the engine.
(b) Disconnect the EVAP hose from the throttle body.
(c) Start the engine.
(d) Confirm that the port of the throttle body has suction with
your fingers.
Result
(e) Reconnect the EVAP hose.
A
B
HINT:
• When reinstalling the fuel tank cap, tighten it until a few
click sounds are heard.
• When replacing the fuel tank cap, use a fuel tank cap that
meets OEM specifications, and tighten it until a few click
sounds are heard.
NEXT
25CHECK HARNESS AND CONNECTOR (PUMP MODULE - BODY GROUND)
A085258E68
Test Result Suspected Trouble Area Proceed to
Below 1
Vacuum Pump A
10 k
or higherWire harness between
vacuum pump and body
groundB
Go to step 30
Go to step 32
26INSPECT THROTTLE BODY
Test Result Suspected Trouble Area Proceed to
Suction appliedEVAP hose between throttle body and
purge VSVA
No suction Throttle body B
Go to step 33
Go to step 34
27CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP
Go to step 37

ES–4402GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
When installing the fuel tank cap, tighten it until a few click
sounds are heard.
NEXT
(a) Disconnect the vent hose.
(b) Connect the EVAP pressure tester tool to the canister
with the adapter.
28REPLACE FUEL TANK CAP ASSEMBLY
Go to step 37
29LOCATE EVAP LEAK
A163294E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–441
ES
(c) Pressurize the EVAP system by 3.2 to 3.7 kPa (24 to 28
mmHg).
(d) Apply soapy water to the piping and the connecting parts
of the EVAP system.
(e) Look for areas where bubbles appear. This indicates a
leak point.
(f) Repair or replace the leak point.
NEXT
(a) Replace the charcoal canister assembly (See page EC-
8).
NOTICE:
When replacing the canister, check the canister
pump module interior and related pipes for water,
fuel and other liquids. If liquids are present, check
for disconnections and/or cracks in the following: 1)
the pipe from the air inlet port to the canister pump
module; 2) the canister filter; 3) the fuel tank vent
hose.
A137044E01
Go to step 37
30REPLACE CHARCOAL CANISTER ASSEMBLY

ES–4422GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NEXT
(a) Disconnect the connector and 2 hoses from the purge
VSV.
(b) Remove the purge VSV.
(c) Install a new purge VSV.
(d) Reconnect the connector and 2 hoses.
NEXT
NEXT
NEXT
A163294E01
Go to step 37
31REPLACE VACUUM SWITCHING VALVE NO. 1 (PURGE VSV)
A136285E01
Go to step 37
32REPAIR OR REPLACE HARNESS OR CONNECTOR
Go to step 37
33REPLACE EVAP HOSE (THROTTLE BODY - PURGE VSV)
Go to step 37

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–443
ES
(a) Remove the throttle body (See page ES-493).
(b) Check that the EVAP purge port of the throttle body is
not clogged. If necessary, replace the throttle body.
NEXT
(a) Replace the ECM (See page ES-498).
NEXT
(a) Repair the malfunctioning areas indicated by the DTCs
that had been confirmed when the vehicle was brought
in.
NEXT
NOTICE:
• In the EVAP SYSTEM CHECK (AUTO OPERATION), the
series of 5 EVAP SYSTEM CHECK steps are performed
automatically. It takes a maximum of approximately 18
minutes.
• Do not perform the EVAP SYSTEM CHECK when the
fuel tank is more than 90% full because the cut-off
valve may be closed, making the leak check of the fuel
tank unavailable.
• Do not run the engine in this step.
• When the temperature of the fuel is 35
C (95F) or
more, a large amount of vapor forms and any check
results become inaccurate. When performing an EVAP
SYSTEM CHECK, keep the temperature below 35
C
(95
F).
(a) Clear the DTCs (See page ES-39).
(b) On the intelligent tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK /
EVAP SYS CHECK / AUTO OPERATION.
(c) After the SYSTEM CHECK is completed, check for
pending DTCs by selecting the following menu items:
DIAGNOSIS / ENHANCED OBD II / DTC INFO /
PENDING CODES.
HINT:
If no pending DTC is found, the repair has been
successfully completed.
34INSPECT THROTTLE BODY
Go to step 37
35REPLACE ECM
Go to step 37
36REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS
37PERFORM EVAP SYSTEM CHECK (AUTO OPERATION)

ES–4442GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NEXT
COMPLETED

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–445
ES
DESCRIPTION
When the ignition switch is turned to the ON position, the battery voltage is applied to terminal IGSW of
the ECM. The ECM MREL output signal causes a current to flow to the coil, closing the contacts of the EFI
relay and supplying power to terminal +B of the ECM.
If the ignition switch is turned off, the ECM holds the EFI relay ON for a maximum of 2 seconds to allow for
the initial setting of the throttle valve.
WIRING DIAGRAM
ECM Power Source Circuit
A136865E04

ES–4462GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
INSPECTION PROCEDURE
(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
NG
(a) Disconnect the E11 ECM connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Check for open
(c) Reconnect the ECM connector.
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
NG
1INSPECT ECM (+B VOLTAGE)
A162489E09
Tester Connection Specified Condition
+B (E4-1) - E1 (E11-1) 9 to 14 V
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
2CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
G035617E21
Tester Connection Specified Condition
E1 (E11-1) - Body ground Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - BODY GROUND)
3INSPECT ECM (IGSW VOLTAGE)
A162489E10
Tester Connection Specified Condition
IGSW (E4-9) - E1 (E11-1) 9 to 14 V
Go to step 8