| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018KF9 |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Brake Warning Light does not Come ON; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
Brake Warning Light does not Come ON |
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.
WIRING DIAGRAM
Refer to Brake Warning Light Remains ON (See page
![2018 - 2020 MY Sienna [11/2017 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Brake Warning Light Remains ON](/t3Portal/stylegraphics/info.gif)
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page
).
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output (See page
).
|
Result |
Proceed to |
|---|---|
|
DTCs are not output. |
A |
|
DTCs are output. |
B |
| B |
|
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE WARNING LIGHT) |
(a) Turn the ignition switch off.
(b) Reconnect the skid control ECU (brake actuator assembly) connector.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) According to the display on the Techstream, perform the Active Test.
(g) Select the Active Test on the Techstream.
ABS/VSC/TRAC
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Brake Warning Light |
Brake warning light |
Warning light ON/OFF |
Can be observed on the combination meter assembly |
(h) When performing the Brake Warning Light Active Test, check Brake Warning Light in the Data List.
ABS/VSC/TRAC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Brake Warning Light |
Brake warning light / ON or OFF |
ON: Warning light on OFF: Warning light off |
- |
|
Result |
Proceed to |
|---|---|
|
Brake warning light in the Data List does not change using the Active Test. |
A |
|
Brake warning light in the Data List turns ON/OFF using the Active Test. |
B |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts (See page
).
| A |
|
|
|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Turn the ignition switch off.
(b) Perform Active Test of the combination meter assembly using the Techstream (See page
).
(c) Check the combination meter assembly.
OK:
The brake warning light turns on or off in accordance with the Techstream.
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts (See page
).
| OK |
|
| NG |
|
|
|