TOYOTA SIENNA 2007 Service Repair Manual

ES–3282GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
• The following troubleshooting flowchart is based on the premise that the engine is cranked normally. If
the engine will not crank, proceed to the problem symptoms table (See page ES-27).
A162043E02

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–329
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• 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) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
(d) Check the value displayed on the tester when the
ignition switch is turned to the ON position and START
position.
OK
OK
NG
(a) Inspect the Park/Neutral Position (PNP) switch.
(1) Disconnect the P1 PNP switch connector.
(2) Measure the resistance according to the value(s) in
the table below.
Standard resistance
(3) Reconnect the PNP switch connector.
NG
OK
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
1READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)
Ignition Switch Positions STARTER SIG
ON OFF
START ON
CHECK FOR INTERMITTENT PROBLEMS
2INSPECT PARK/NEUTRAL POSITION SWITCH
A093221E20
Shift Position Tester Connection Specified Condition
P 2 - 6, 4 - 5 Below 1
R 1 - 2 Below 1
N 2 - 9, 4 - 5 Below 1
D 2 - 7 Below 1
2 2 - 3 Below 1
L 2 - 8 Below 1
REPLACE PARK/NEUTRAL POSITION
SWITCH (See page AX-125)
3READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)

ES–3302GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
(d) Check the value displayed on the tester when the
ignition switch is turned to the ON position and the
START position.
OK
OK
NG
(a) Disconnect the I15 ignition switch connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reconnect the ignition switch connector.
NG
OK
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY /
STARTER SIG.
(d) Check the value displayed on the tester when the
ignition switch is turned to the ON position and the
START position.
OK
OK
Ignition Switch Positions STARTER SIG
ON OFF
START ON
SYSTEM OK
4INSPECT IGNITION SWITCH ASSEMBLY
B050489E19
Switch Condition Terminal No. Specified Condition
LOCK All Terminals 10 k
or higher
ACC 1 - 3
Below 1
ON 1 - 2, 1 - 3, 2 - 3, 5 - 6
START 4 - 5, 4 - 6, 5 - 6, 1 - 2
REPLACE IGNITION SWITCH ASSEMBLY
(GO TO NEXT STEP 5 AFTER
REPLACEMENT) (See page ST-16)
5READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)
Ignition Switch Positions STARTER SIG
ON OFF
START ON
SYSTEM OK

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–331
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NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (PNP SWITCH - STA TERMINAL OF ECM)

ES–3322GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
DTC P0630 is set when the Vehicle Identification Number (VIN) is not stored in the Engine Control Module
(ECM) or the input VIN is not accurate. Input the VIN with the intelligent tester.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(d) Read the DTCs.
Result
DTC P0630 VIN not Programmed or Mismatch - ECM / PCM
DTC No. DTC Detection Condition Trouble Area
P0630• VIN is not stored in ECM
• Input VIN in ECM is not accurateECM
Related DTCs P0630: VIN not programmed
Required Sensors / Components (Main) ECM
Required Sensors / Components (Related) -
Frequency of Operation Continuous
Duration 0.325 seconds
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
VIN code Not programmed
VIN code Programmed
1READ CURRENT DTC
Display (DTC Output) Proceed to
P0630 A
P0630 and other DTCs B

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–333
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If any DTCs other than P0630 are output, troubleshoot
those DTCs first.
NOTICE:
If P0630 is set, the VIN must be input to the ECM
using the intelligent tester. However, all DTCs are
cleared automatically by the tester when inputting
the VIN. If DTCs other than P0630 are set, check
them first.
B
A
HINT:
Refer to "REGISTRATION" (See page ES-15).
NEXT
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(d) Read the DTCs again.
Result:
DTC is not output (P0630).
NG
OKGO TO DTC CHART (See page ES-56)
2INPUT VIN WITH INTELLIGENT TESTER
3READ CURRENT DTC
REPLACE ECM (See page ES-498)
END

ES–3342GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is
functioning properly. The output voltage is usually 0 V when the ignition switch is turned off. If the output
voltage is higher than 7 volts when the ignition switch is turned off, the ECM will illuminate the MIL and set
a DTC when the ignition switch is turned on.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Clear the DTC.
(e) Turn the ignition switch off.
(f) Disconnect the battery negative terminal and wait for 1
minute.
(g) Connect the battery negative terminal.
(h) Turn the ignition switch to the ON position for 10
seconds.
(i) Turn the ignition switch off.
(j) Turn the ignition switch to the ON position.
(k) Enter the following menus: DIAGNOSIS / ENHANCED II
/ DTC INFO / CURRENT CODES.
(l) Read the DTCs.
DTC P0657 Actuator Supply Voltage Circuit / Open
DTC DTC Detection Condition Trouble Area
P0657 Throttle actuator power supply error ECM
Related DTC P0657: ETCS power supply
Required sensors/Components (main) ECM
Required sensors/Components (sub) Throttle actuator
Frequency of Operation Once per driving cycle
Duration Within 1 second
MIL Operation Immediate
Sequence of Operation None
Monitor will run whenever this DTC is not present None
Ignition switch From ON to OFF
Throttle actuator power supply 7 V or more
1CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P0657)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–335
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Result
B
A
Display (DTC output) Proceed to
P0657 A
No output DTC B
CHECK FOR INTERMITTENT PROBLEMS
REPLACE ECM

ES–3362GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
HINT:
After confirming DTC P0705, use the intelligent tester to confirm the PNP switch signal in the ALL menu
(to reach the ALL menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL).
WIRING DIAGRAM
Refer to DTC P0705 for 2WD model (See page AX-40) or 4WD model (See page AX-40).
INSPECTION PROCEDURE
Refer to DTC P0705 for 2WD model (See page AX-41) or 4WD model (See page AX-41).
HINT:
Read freeze frame data using the intelligent tester or OBD II scan tool. The ECM records vehicle and
driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting,
freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up
or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.
DTC P0705Transmission Range Sensor Circuit Malfunc-
tion (PRNDL Input)
DTC No. DTC Detection Condition Trouble Area
P0705(A) Any 2 or more signals of the following are ON
simultaneously (2-trip detection logic)
• P input signal is ON.
• N input signal is ON.
• R input signal is ON.
• D input signal is ON.
(B) Any 2 ore more signals of the following are ON
simultaneously (2-trip detection logic)
• NSW input signal is ON.
• R input signal is ON.
• D input signal is ON.
(C) Any of following conditions is met for 2.0 sec. or more in
the S position (2-trip detection logic).
• NSW input signal is ON.
• P input signal is ON.
• N input signal is ON.
• R input signal is ON.
(D) All switches are OFF simultaneously for NSW, P, R, N and
D.• Open or short in park/neutral position switch circuit
• Park/neutral position switch
•ECM

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–337
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DESCRIPTION
The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.
The opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted
on the throttle body. The TP sensor provides feedback to the ECM. This feedback allows the ECM to
appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to
driver inputs.
HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.
MONITOR DESCRIPTION
The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and
open circuits in the throttle actuator based on this value. If the current is outside the standard range, the
ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does
not function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM
then illuminates the MIL and sets a DTC.
Example:
When the electrical current is more than 10 A, or less than 0.5 A and the throttle actuator duty ratio
exceeds 80%, the ECM interprets this as the current being outside the standard range, and illuminates the
MIL and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set when the engine is quickly revved up to a high
rpm several times after the engine has idled for 5 seconds after engine start.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
DTC P2102 Throttle Actuator Control Motor Circuit Low
DTC P2103 Throttle Actuator Control Motor Circuit High
DTC No. DTC Detection Condition Trouble Area
P2102Conditions (a) and (b) continue for 2.0 seconds (1 trip
detection logic):
(a) Throttle actuator duty ratio exceeds 80% or more
(b) Throttle actuator current is 0.5 A or less• Open in throttle actuator circuit
• Throttle actuator
•ECM
P2103Either of the following conditions is met:
• Hybrid IC diagnosis signal fails
• Hybrid IC current limiter port fails• Short in throttle actuator circuit
• Throttle actuator
• Throttle valve
• Throttle body
•ECM
Related DTCsP2102: Throttle actuator current (low current)
P2103: Throttle actuator current (high current)
Required Sensors / Components (Main) Throttle actuator (throttle body)
Required Sensors / Components (Related) None
Frequency of Operation Continuous
DurationP2102: 2 seconds
P2103: 25 times or 0.6 seconds
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone