- Acceleration sensor (airbag sensor assembly)
- Wire harness or connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018KEE |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1381; Acceleration Sensor Power Supply Voltage Malfunction; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
C1381 |
Acceleration Sensor Power Supply Voltage Malfunction |
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output.
These DTCs are also output when calibration has not been completed.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1381 |
At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration and store system information (See page
![2018 - 2020 MY Sienna [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.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (IG2 TERMINAL) |
NOTICE:
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (See page
).
-
When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page
).
|
(a) Turn the ignition switch off. |
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(d) Disconnect the yaw rate and acceleration sensor (airbag sensor assembly) connector.
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON.
(g) Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D150-21 (IG2) - Body ground |
Ignition switch ON |
8 to 16 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|
2. |
CHECK HARNESS AND CONNECTOR (GND 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 |
|---|---|---|
|
D150-25 (E1) - Body ground |
Always |
Below 1 Ω |
|
D150-26 (E2) - Body ground |
Always |
Below 1 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) |
|
|
3. |
RECONFIRM DTC |
(a) Reconnect the D150 yaw rate and acceleration sensor (airbag sensor assembly) connector.
(b) Clear the DTCs (See page
).
(c) Turn the ignition switch off.
(d) Start the engine.
(e) Perform a road test.
(f) Check if the same DTC is output (See page
).
|
Result |
Proceed to |
|---|---|
|
DTC C1381 is not output. |
A |
|
DTC C1381 is output |
B |
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement (See page
).
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 |
|
| B |
|
|
|