| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VKHI |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: Light Control Switch Circuit; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Light Control Switch Circuit |
DESCRIPTION
The main body ECU receives the following switch information:
- Light control switch position DRL-OFF*1, off*2, tail, head, DRL*3 or AUTO*4
- Dimmer switch position high, low or high flash (pass)
-
Fog light switch position on or off
- *1: w/ DRL OFF switch
- *2: w/o DRL OFF switch
- *3: w/ DRL switch
- *4: w/ Automatic Light Control System
WIRING DIAGRAM
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(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) Read the display on the Techstream.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Dimmer SW |
Dimmer switch high position signal/ON or OFF |
ON: Dimmer switch in high or high flash (pass) position OFF: Dimmer switch in low position |
- |
|
Passing Light SW |
Dimmer switch high flash (pass) position signal/ON or OFF |
ON: Dimmer switch in high flash (pass) position OFF: Dimmer switch not in high flash (pass) position |
- |
|
Front Fog Light SW |
Front fog light switch signal/ON or OFF |
ON: Front fog light switch on OFF: Front fog light switch off |
- |
|
Auto Light SW |
Light control switch AUTO*1 or DRL*2 position signal/ON or OFF |
ON: Light control switch in AUTO*1 or DRL*2 position OFF: Light control switch not in AUTO*1 or DRL*2 position |
- |
|
Head Light SW (Head) |
Light control switch head position signal/ON or OFF |
ON: Light control switch in head position OFF: Light control switch not in head position |
- |
|
Head Light SW (Tail) |
Light control switch tail position signal/ON or OFF |
ON: Light control switch in tail or head position OFF: Light control switch in neither tail nor head position |
- |
- *1: w/ Automatic Light Control System
- *2: w/ DRL Switch
OK:
Normal conditions listed above are displayed.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (See page
|
![2016 MY Sienna [12/2015 - 08/2016]; LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE](/t3Portal/stylegraphics/info.gif)
|
|
2. |
INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY |
HINT:
Inspect the items that did not change as a result of monitoring the Data List.
|
(a) Remove the headlight dimmer switch assembly (See page
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Light Control Switch
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
12 (EL) - 18 (T) |
OFF |
10 kΩ or higher |
|
18 (T) - 19 (A) |
OFF |
10 kΩ or higher |
|
19 (A) - 20 (H) |
OFF |
10 kΩ or higher |
|
12 (EL) - 18 (T) |
TAIL |
Below 1 Ω |
|
12 (EL) - 18 (T) |
HEAD |
Below 1 Ω |
|
18 (T) - 20 (H) |
HEAD |
Below 1 Ω |
|
12 (EL) - 19 (A) |
AUTO |
Below 1 Ω |
Dimmer Switch
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
11 (HU) - 12 (EL) |
LOW |
10 kΩ or higher |
|
11 (HU) - 12 (EL) |
HIGH |
Below 1 Ω |
|
12 (EL) - 17 (HF) |
HIGH FLASH |
Below 1 Ω |
Fog Light Switch
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
3 (LFG) - 4 (BFG) |
OFF |
10 kΩ or higher |
|
3 (LFG) - 4 (BFG) |
ON |
Below 1 Ω |
Text in Illustration
|
*a |
Component without harness connected: (Headlight Dimmer Switch Assembly) |
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - HEADLIGHT DIMMER SWITCH ASSEMBLY) |
(a) Disconnect the D147 headlight dimmer switch assembly connector.
(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 |
|---|---|---|
|
D147-4 (BFG) - D13-27 (FFOG) |
Always |
Below 1 Ω |
|
D147-11 (HU) - D13-5 (HU) |
Always |
Below 1 Ω |
|
D147-17 (HF) - D13-8 (HF) |
Always |
Below 1 Ω |
|
D147-18 (T) - D13-30 (TAIL) |
Always |
Below 1 Ω |
|
D147-19 (A) - D13-28 (A) |
Always |
Below 1 Ω |
|
D147-20 (H) - D13-29 (HEAD) |
Always |
Below 1 Ω |
|
D147-3 (LFG) - Body ground |
Always |
Below 1 Ω |
|
D147-4 (BFG) or D13-27 (FFOG)- Body ground |
Always |
10 kΩ or higher |
|
D147-11 (HU) or D13-5 (HU)- Body ground |
Always |
10 kΩ or higher |
|
D147-17 (HF) or D13-8 (HF)- Body ground |
Always |
10 kΩ or higher |
|
D147-18 (T) or D13-30 (TAIL)- Body ground |
Always |
10 kΩ or higher |
|
D147-19 (A) or D13-28 (A)- Body ground |
Always |
10 kΩ or higher |
|
D147-20 (H) or D13-29 (HEAD)- Body ground |
Always |
10 kΩ or higher |
|
D147-12 (EL) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|