Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VIV1 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: ABS Warning Light Remains ON; 2016 MY Sienna [12/2015 - 08/2016] |
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
).
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
|
A
|
|
|
2.
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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
|
OK
|
|
|
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
OK
|
|
|
4.
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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)
|
OK
|
|
|
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)
|
OK
|
|
|
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
).
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