2007 TOYOTA SIENNA check engine

ES–4682GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the F24 fuel pump resistor connector.
(b) Disconnect the F20 fuel pump 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 fuel pump resistor connector.
(e) Reconnect the fuel pump connector.
NG
OK
16CHECK HARNESS AND CONNECTOR (FUEL PUMP RESISTOR - FUEL PUMP)
A137393E04
Tester Connection Specified Condition
F24-2 - F20-4 Below 1
Tester Connection Specified Condition
F24-2 or F20-4 - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (FUEL PUMP RESISTOR -
FUEL PUMP)
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See page
ES-27)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–469
ES
DESCRIPTION
The system detects the ignition switch's starting signal (STSW) and then supplies current to the starter
until the ECM judges that the engine has started successfully. The purpose is to reduce the holding time
of the ignition key.
WIRING DIAGRAM
Refer to DTC P0617 (See page ES-320).
INSPECTION PROCEDURE
(a) When starting the engine, check whether the starter
motor starts.
OK:
Engine is cranking.
Cranking Holding Function Circuit
1CHECK CRANKING
A166695E01

ES–4702GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK
NG
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBDII / DATA LIST / ALL / STARTER SIG.
(e) Check the result when the ignition switch is turned ON
and when the engine is started.
OK
OK
NG
(a) Measure the voltage between the terminals of the ECM
connector and body ground while cranking the engine.
Standard voltage
Result
B
C
ACHECK FOR INTERMITTENT PROBLEMS
2READ VALUE OF INTELLIGENT TESTER (STA SIGNAL)
Display (STARTER SIG) Condition
OFF Ignition switch ON
ON Engine start
Go to step 6
3CHECK ECM (STAR AND STSW VOLTAGE)
A162489E16
Tester Connection Specified Condition
STAR (E10-8) - Body ground 9 to 14 V
STSW (E11-12) - Body ground 9 to 14 V
Terminal STAR Terminal STSW Proceed to
9 to 14 V 9 to 14 V A
0 V 9 to 14 V B
0 V 0 V C
REPLACE ECM
Go to step 13

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–471
ES
(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) Disconnect the I15 ignition switch connector.
(b) Disconnect the P1 park/neutral position switch
connector.
(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) Reconnect the park/neutral position switch connector.
NG
4INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY
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 ASSEMBLY
5CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - PARK/NEUTRAL POSITION
SWITCH)
A166711E01
Tester Connection Specified Condition
ST2 (I15-4) - P1-4 Below 1
Tester Connection Specified Condition
ST2 (I15-4) or P1-4 - Body ground 10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (IGNITION SWITCH - PARK/
NEUTRAL POSITION SWITCH)

ES–4722GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK
(a) Remove the ST relay from the No. 3 relay block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the ST relay to the No. 3 relay block.
NG
OK
(a) Disconnect the P1 park/neutral position switch
connector.
(b) Remove the ST relay from the No. 3 relay 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 park/neutral position switch connector.
(e) Reinstall the ST relay to the No. 3 relay block.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)
6INSPECT ST RELAY
B016200
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5Below 1
(Apply battery voltage between
terminals 1 and 2)
REPLACE ST RELAY
7CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY)
A166712E01
Tester Connection Specified Condition
P1-5 - ST relay terminal (1) Below 1
Tester Connection Specified Condition
P1-5 or ST relay terminal (1) - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (PARK/NEUTRAL POSITION
SWITCH - ST RELAY)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–473
ES
OK
(a) Remove the ST relay from the No. 3 relay block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reinstall the ST relay to the No. 3 relay block.
NG
OK
(a) Remove the ST relay from the No. 3 relay block.
(b) Measure the voltage according to the value(s) in the
table below.
Standard voltage
(c) Reinstall the ST relay to the No. 3 relay block.
OK
NG
8CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)
A166709E01
Tester Connection Specified Condition
ST relay terminal (2) - Body ground Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ST RELAY - BODY GROUND)
9CHECK ST RELAY (POWER SOURCE)
A166709E01
Tester Connection Specified Condition
ST relay terminal (5) - Body ground 9 to 14 V
Go to step 11

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–475
ES
(a) Remove the ST relay from the No. 3 relay block.
(b) Disconnect the S4 starter connector.
(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 starter connector.
(e) Reinstall the ST relay to the No. 3 relay block.
NG
OK
12CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY)
A166713E01
Tester Connection Specified Condition
ST relay terminal (3) - S4-1 Below 1
Tester Connection Specified Condition
ST relay terminal (3) or S4-1 - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ST RELAY - STARTER
ASSEMBLY)
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER ASSEMBLY)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–477
ES
(a) Disconnect the E11 ECM connector.
(b) Disconnect the I15 ignition switch connector.
(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 ECM connector.
(e) Reconnect the ignition switch connector.
NG
OK
15CHECK HARNESS AND CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)
A166724E01
Tester Connection Specified Condition
STSW (E11-12) - ST2 (I15-4) Below 1
Tester Connection Specified Condition
STSW (E11-12) or ST2 (I15-4) - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (ECM - IGNITION SWITCH
ASSEMBLY)
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)