| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000001019B |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: Daytime Running Light Relay Circuit; 2017 - 2020 MY Sienna [08/2016 - ] | ||
|
Daytime Running Light Relay Circuit |
DESCRIPTION
The main body ECU controls the daytime running lights.
HINT:
- The running light relay has a headlight control function. This function dims the high beam headlights in accordance with operation signals from the main body ECU while the daytime running light system is operating*1.
- The running light relay dims the high beam headlights using a duty control*1.
- The main body ECU controls the LED DRL relay*2.
- *1: for DRL Bulb Type
- *2: for DRL LED Type
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CONFIRM VEHICLE TYPE |
(a) Confirm vehicle type.
Result
|
Result |
Proceed to |
|---|---|
|
for DRL Bulb Type |
A |
|
for DRL LED Type |
B |
| B |
|
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (DAYTIME RUNNING LIGHT) |
(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 |
|---|---|---|---|
|
Daytime Running Light |
Daytime running light relay |
ON/OFF |
- |
OK:
Relay operates. (Daytime running lights illuminate.)
| OK |
|
|
|
3. |
CHECK HEADLIGHT |
(a) Check the operation of the high beam headlights.
OK:
High beam headlights operate normally.
| NG |
|
GO TO PROBLEM SYMPTOMS TABLE (See page
|
|
|
4. |
INSPECT RUNNING LIGHT RELAY |
|
(a) Remove the running light relay from the engine room relay block. |
|
(b) Connect a positive (+) lead from the battery to terminal 6 (+B).
(c) Connect a negative (-) lead from the battery to terminal 2 (DRLS).
(d) Check for pulses according to the value(s) in the table below.
OK:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (HLOR) - Battery negative |
Always |
Pulse generation |
|
5 (HLOL) - Battery negative |
Always |
Pulse generation |
| NG |
|
REPLACE RUNNING LIGHT RELAY (DRL RELAY) |
|
|
5. |
CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - INSTRUMENT PANEL JUNCTION BLOCK) |
(a) Remove the running light relay from the engine room relay block assembly.
(b) Remove the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 (DRLS) - D13-15 (DRL) |
Always |
Below 1 Ω |
|
2 (DRLS) or D13-15 (DRL) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
PERFORM ACTIVE TEST USING TECHSTREAM (DAYTIME RUNNING LIGHT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) According to the display on the Techstream, perform the Active Test.
Main Body
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Daytime Running Light |
Running light relay |
OFF or ON |
- |
OK:
Daytime running lights illuminate.
| OK |
|
|
|
7. |
INSPECT RUNNING LIGHT RELAY (LED DRL RELAY) |
(a) Remove the running light relay (LED DRL relay).
(b) Inspect the running light relay (LED DRL relay) (See page
![2017 - 2020 MY Sienna [08/2016 - ]; LIGHTING (EXT): RELAY: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
).
| NG |
|
REPLACE RUNNING LIGHT RELAY (DRL RELAY) |
|
|
8. |
CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - BATTERY) |
(a) Remove the running light relay (LED DRL relay) from the No. 3 relay block.
(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 |
|
|
9. |
CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - MAIN BODY ECU) |
(a) Remove the running light relay (LED DRL relay) from the engine room relay block.
(b) Disconnect the D13 main body ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 - D13-15 (DRL) |
Always |
Below 1 Ω |
|
2 or D13-15 (DRL) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|