-
All of the following conditions continue for 0.1 seconds or more.
- The IG1 terminal voltage is between 9.5 and 17.2 V.
- While initial check, or ABS, BA, TRAC or VSC is operating.
- Relay contact remains open when the relay is ON.
-
Both of the following conditions continue for 0.1 seconds or more.
- The IG1 terminal voltage is less than 9.5 V.
- Relay contact remains open when the relay is ON.
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIVM |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C0273,C0274,C1361; Open in ABS Motor Relay Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
DTC |
C0273 |
Open in ABS Motor Relay Circuit |
|
DTC |
C0274 |
Short in ABS Motor Relay Circuit |
|
DTC |
C1361 |
Short in ABS Motor Fail Safe Relay Circuit |
DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU turns the motor relay on and operates the ABS pump motor.
If the voltage supplied to the motor relay (BM) is below the DTCs detection threshold due to low voltage from the battery or alternator, these DTCs may be stored.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C0273 |
Either of the following is detected: |
|
|
C0274 |
When the motor relay is OFF, the motor relay remains closed for 4 seconds or more. |
|
|
C1361 |
Immediately after the ignition switch is turned to ON, the relay contact is closed for 4 seconds when the motor fail safe relay is OFF. |
|
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)
).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
When DTC C1241 and/or C1417 is output together with DTC C0273, C0274 and/or C1361, inspect and repair the trouble areas indicated by DTC C1241 and/or C1417 first (See page
, or
).
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY) |
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/ TRAC / Active Test.
(e) Select the Active Test on the Techstream (See page
).
ABS/VSC/TRAC
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Motor Relay |
ABS motor relay |
Relay ON/OFF |
Operating sound of motor can be heard |
(f) Check for operating sound of the ABS motor relay when operating it using the Techstream.
Result
|
Result |
Proceed to |
|---|---|
|
Operating sound is not heard |
A |
|
Operating sound is heard |
B |
| B |
|
|
|
2. |
INSPECT SKID CONTROL ECU (BM TERMINAL) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(b) Disconnect the skid control ECU connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A4-24 (BM) - Body ground |
Always |
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 (BM CIRCUIT) |
|
|
3. |
INSPECT SKID CONTROL ECU (GND2 TERMINAL) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
Text in Illustration
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT) |
|
|
4. |
RECONFIRM DTC |
HINT:
This code is detected when a problem is identified in the brake actuator assembly.
The ABS motor relay is in the brake actuator assembly.
Therefore, ABS motor relay inspection and motor relay unit inspection cannot be performed. Be sure to check if the DTC is output before replacing the brake actuator assembly.
(a) Turn the ignition switch off.
(b) Reconnect the skid control ECU connector.
(c) Clear the DTCs (See page
).
(d) Start the engine.
(e) Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
(f) Check if the same DTC is recorded (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTCs (C0273, C0274 and C1361) are not output |
A |
|
DTCs (C0273, C0274 and/or C1361) are output |
B |
HINT:
- If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the ignition switch to ON and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
- If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
- If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.
- The DTCs were possibly output due to a bad connection of the connector terminal.
| A |
|
CHECK FOR INTERMITTENT PROBLEMS (See page
|
| B |
|
|
|