- Brake actuator assembly (Ground circuit)
- Brake actuator assembly (Motor circuit)
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIVV |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1427; Motor Malfunction; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
DTC |
C1427 |
Motor Malfunction |
DESCRIPTION
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1427 |
Actuator pump motor does not operate properly. |
|
WIRING DIAGRAM
Refer to DTCs C0273, C0274 and C1361 (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C0273,C0274,C1361; Open in ABS Motor Relay Circuit+](/t3Portal/stylegraphics/info.gif)
).
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the brake actuator assembly, perform zero point calibration and store system information (See page
).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
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 (GND2 TERMINAL) |
|
(a) Turn the ignition switch off. |
|
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A4-13 (GND2) - 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 (GND2 CIRCUIT) |
|
|
3. |
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 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 |
|---|---|
|
DTC (C1427) is not output |
A |
|
DTC (C1427) is 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 |
|
|
|