Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000ZY83 |
Model Year Start: 2017 |
Model: Sienna |
Prod Date Range: [08/2016 -
] |
Title: LIGHTING (EXT): LIGHTING SYSTEM: Headlight Relay Circuit; 2017 - 2020 MY Sienna [08/2016 - ] |
DESCRIPTION
The main body ECU controls the headlight 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 (HEADLIGHT 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 relays operate.
Main Body
Tester Display
|
Test Part
|
Control Range
|
Diagnostic Note
|
Headlight Relay
|
Low beam headlight relay
|
ON/OFF
|
-
|
OK:
Relays operates. (Low beam headlights illuminate.)
OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
(See page
)
|
NG
|
|
|
2.
|
INSPECT HEADLIGHT RELAY (H-LP RELAY)
|
(a) Remove the headlight relay.
(b) Inspect the headlight relay (See page
).
NG |
|
REPLACE HEADLIGHT RELAY
|
OK
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT RELAY)
|
(a) Remove the headlight relay.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
1 - Body ground
|
Always
|
11 to 14 V
|
3 - Body ground
|
Always
|
11 to 14 V
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
|
(a) Disconnect the 2F instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
2 - 2F-25
|
Always
|
Below 1 Ω
|
2 or 2F-25 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
(a) Remove the instrument panel junction block assembly.
|
|
*a
|
Component without harness connected
(Instrument Panel Junction Block Assembly)
|
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
2F-25 - 2I-15 (HRLY)
|
Always
|
Below 1 Ω
|
2F-25 or 2I-15 (HRLY) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|