Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000YS0K |
Model Year Start: 2017 |
Model: Sienna |
Prod Date Range: [08/2016 -
] |
Title: LIGHTING (INT): LIGHTING SYSTEM: IG Signal Circuit; 2017 - 2020 MY Sienna [08/2016 - ] |
DESCRIPTION
This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
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READ VALUE USING TECHSTREAM (IG SW)
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(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on the Techstream, read the Data List.
Main Body
Tester Display
|
Measurement Item/Range
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Normal Condition
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Diagnostic Note
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IG SW
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Ignition switch or engine switch IG signal/ON or OFF
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ON: Ignition switch ON
OFF: Ignition switch off
|
-
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OK:
Normal conditions listed above are displayed.
NG
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND)
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(a) Disconnect the instrument panel junction block assembly connectors.
|
|
*a
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Front view of wire harness connector
(to Instrument Panel Junction Block Assembly)
|
|
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
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Specified Condition
|
2K-1 - Body ground
|
Always
|
11 to 14 V
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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2D-5 - Body ground
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Always
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Below 1 Ω
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(d) Reconnect the instrument panel junction block assembly connectors.
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
|
|
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3.
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CHECK VEHICLE CONDITION
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(a) Check the vehicle condition.
Result
Condition
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Proceed to
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w/o Smart Key System
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A
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w/ Smart Key System
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B
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A
|
|
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4.
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CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - IGNITION SWITCH)
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(a) Disconnect the 2A instrument panel junction block assembly connector.
(b) Disconnect the D27 ignition switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
2A-16 - D27-4 (IG1)
|
Always
|
Below 1 Ω
|
2A-38 - D27-2 (AM1)
|
Always
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Below 1 Ω
|
2A-16 - Body ground
|
Always
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10 kΩ or higher
|
2A-38 - Body ground
|
Always
|
10 kΩ or higher
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(d) Reconnect the ignition switch connector.
(e) Reconnect the instrument panel junction block assembly connector.
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
|
|
|
5.
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INSPECT IGNITION SWITCH
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(a) Remove the ignition switch.
Click here
|
|
*a
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Component without harness connected
(Ignition Switch)
|
|
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Switch Condition
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Specified Condition
|
2 (AM1) - 4 (IG1)
|
Ignition switch off
|
10 kΩ or higher
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Ignition switch ON
|
Below 1 Ω
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(c) Reinstall the ignition switch.
OK
|
|
|
6.
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INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
(a) Remove the main body ECU from the instrument panel junction block assembly.
Click here
|
|
*1
|
Instrument Panel Junction Block Assembly
|
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Switch Condition
|
Specified Condition
|
2I-32 (IG) - Body ground
|
Ignition switch ON
|
11 to 14 V
|
(c) Reinstall the main body ECU to the instrument panel junction block assembly.
Click here
7.
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CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT)
|
(a) Disconnect the instrument panel junction block assembly connector.
|
|
*a
|
Front view of wire harness connector
(to Instrument Panel Junction Block Assembly)
|
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Switch Condition
|
Specified Condition
|
2A-16 - Body ground
|
Engine switch on (IG)
|
11 to 14 V
|
(c) Reconnect the instrument panel junction block assembly connector.
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
8.
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INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
(a) Remove the main body ECU from the instrument panel junction block assembly.
Click here
|
|
*1
|
Instrument Panel Junction Block Assembly
|
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Switch Condition
|
Specified Condition
|
2I-32 (IG) - Body ground
|
Engine switch on (IG)
|
11 to 14 V
|
(c) Reinstall the main body ECU to the instrument panel junction block assembly.
|