| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM10000000104IK |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: ABS Warning Light Remains ON; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
ABS Warning Light Remains ON |
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN communication.
If any of the following is detected, the ABS warning light remains on:
- The skid control ECU connector is disconnected from the skid control ECU.
- There is a malfunction in the skid control ECU internal circuit.
- There is an open in the harness between the combination meter and the skid control ECU.
- The ABS control system is defective.
HINT:
In some cases, the Techstream cannot be used when the skid control ECU is abnormal.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.gif)
).
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if a CAN communication system DTC is output (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| B |
|
|
|
2. |
CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED |
(a) Check if the skid control ECU connector is securely connected.
OK:
The connector is securely connected.
| NG |
|
CONNECT CONNECTOR TO ECU CORRECTLY |
|
|
3. |
INSPECT BATTERY |
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
| NG |
|
|
|
4. |
INSPECT SKID CONTROL ECU (IG1 TERMINAL) |
|
(a) Disconnect the skid control ECU connector. |
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A4-34 (IG1) - Body ground |
Ignition switch ON |
11 to 14 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to Skid Control ECU) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) |
|
|
5. |
INSPECT SKID CONTROL ECU (GND1 TERMINAL) |
|
(a) Turn the ignition switch off. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A4-1 (GND1) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to Skid Control ECU) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) |
|
|
6. |
PERFORM ACTIVE TEST USING TECHSTREAM (ABS WARNING LIGHT) |
(a) Reconnect the skid control ECU connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(f) Select the Active Test on the Techstream.
Combination Meter
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Indicat. Lamp ABS |
ABS warning light |
OFF or ON |
Operate with IG ON and the vehicle is stopped. |
(g) Check that the ABS warning light on the combination meter turns on or off in accordance with the Techstream operation.
OK:
The ABS Warning Light turns on or off in accordance with the Techstream operation.
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 the part (See page
).
| OK |
|
| NG |
|
|
|