Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VI9Y |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: Starter Signal Circuit; 2016 MY Sienna [12/2015 - 08/2016] |
DESCRIPTION
While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the park/neutral position switch and also flows to terminal STA of the ECM (STA signal).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
|
READ VALUE USING TECHSTREAM (STARTER SIGNAL)
|
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Starter Signal.
(e) Read the value displayed on the Techstream when the ignition switch is turned ON and the engine is started.
OK:
Condition
|
Techstream Display
|
Ignition switch ON
|
OFF
|
Engine started
|
ON
|
Result
Result
|
Proceed to
|
NG
|
A
|
OK
|
B
|
A
|
|
|
2.
|
INSPECT PARK/NEUTRAL POSITION SWITCH (B - L)
|
(a) Inspect the park/neutral position switch (See page
for 2WD,
for AWD).
Result
Result
|
Proceed to
|
OK
|
A
|
NG
(for 2WD)
|
B
|
NG
(for AWD)
|
C
|
A
|
|
|
3.
|
INSPECT IGNITION SWITCH ASSEMBLY (AM2 - ST2)
|
(a) Inspect the ignition switch assembly (See page
).
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH)
|
(a) Disconnect the ignition switch assembly connector.
(b) Disconnect the park/neutral position switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
|
Condition
|
Specified Condition
|
D27-8 (ST2) - B3-4 (B)
|
Always
|
Below 1 Ω
|
Standard Resistance (Check for Short):
Tester Connection
|
Condition
|
Specified Condition
|
D27-8 (ST2) or B3-4 (B) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ST RELAY - ECM)
|
(a) Remove the ST relay from the engine room relay block.
(b) Disconnect the park/neutral position switch connector.
(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
|
Condition
|
Specified Condition
|
2 (ST relay holder) - A39-46 (STA)
|
Always
|
Below 1 Ω
|
2 (ST relay holder) - B3-9 (L)
|
Always
|
Below 1 Ω
|
Standard Resistance (Check for Open):
Tester Connection
|
Condition
|
Specified Condition
|
2 (ST relay holder) or A39-46 (STA) - body ground
|
Always
|
10 kΩ or higher
|
2 (ST relay holder) or B3-9 (L) - body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
(a) Check that the battery is not depleted.
OK:
Battery is not depleted.
NG |
|
REPLACE BATTERY
|
OK
|
|
|
7.
|
CHECK BATTERY TERMINAL
|
(a) Check that the battery terminal are not loose or corroded.
OK:
Battery terminals are not loose or corroded.
OK |
|
REPAIR OR REPLACE STARTER CIRCUIT (STARTER ASSEMBLY - ST RELAY)
|
NG |
|
REPAIR OR REPLACE BATTERY TERMINAL
|
|