Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000ZY86 |
Model Year Start: 2017 |
Model: Sienna |
Prod Date Range: [08/2016 -
] |
Title: LIGHTING (EXT): LIGHTING SYSTEM: Taillight Relay Circuit; 2017 - 2020 MY Sienna [08/2016 - ] |
DESCRIPTION
The main body ECU controls the operation of the TAIL relay.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1.
|
PERFORM ACTIVE TEST USING TECHSTREAM (TAILLIGHT RELAY)
|
(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 / Active Test.
(e) Check that the relay operates.
Main Body
Tester Display
|
Test Part
|
Control Range
|
Diagnostic Note
|
Taillight Relay
|
Taillight relay
|
ON/OFF
|
-
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OK:
Taillight relay operates. (Taillights illuminate.)
OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
(See page
)
|
NG
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
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(a) Disconnect the instrument panel junction block assembly connector.
|
|
*a
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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
|
Condition
|
Specified Condition
|
2K-1 - Body ground
|
Always
|
11 to 14 V
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
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3.
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REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
(a) Temporarily replace the instrument panel junction block assembly with a new or normally functioning one.
NEXT
|
|
|
4.
|
PERFORM ACTIVE TEST USING TECHSTREAM (TAILLIGHT RELAY)
|
(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 / Active Test.
(e) Check that the relay operates.
Main Body
Tester Display
|
Test Part
|
Control Range
|
Diagnostic Note
|
Taillight Relay
|
Taillight relay
|
ON/OFF
|
-
|
OK:
Taillight relay operates. (Taillights illuminate.)
OK |
|
END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE)
|
|