| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001HG94 |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - 12/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1381; Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021] | ||
|
DTC |
C1381 |
Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor |
DESCRIPTION
This DTC is stored when the skid control ECU (brake booster with master cylinder assembly) receives a sensor supply voltage malfunction signal from the yaw rate and acceleration sensor (airbag ECU assembly). This DTC may also be stored due to a temporary power source voltage drop.
|
DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|---|
|
C1381 |
Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor |
601 |
When the IG1 terminal voltage exceeds 9.5 V and the vehicle speed exceeds 3 km/h, a power supply voltage malfunction signal is received from the yaw rate sensor continuously for 10 seconds or more. |
|
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the yaw rate and acceleration sensor (airbag ECU assembly), perform zero point calibration.
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![2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY](/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 auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work.
Click here
-
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
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(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) auxiliary 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 connector. |
|
(d) Disconnect the G70 yaw rate and acceleration sensor (airbag ECU assembly) connector.
(e) Connect the cable to the negative (-) auxiliary 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 |
|---|---|---|
|
G70-36 (IG2) - Body ground |
Ignition switch ON |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 CIRCUIT) |
|
|
2. |
CHECK HARNESS AND CONNECTOR (E 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 |
|---|---|---|
|
G70-33 (E1) - Body ground |
Always |
Below 1 Ω |
|
G70-32 (E2) - Body ground |
Always |
Below 1 Ω |
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement.
Click here
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.
Click here
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (E CIRCUIT) |
|
|
3. |
RECONFIRM DTC |
(a) Reconnect the G70 yaw rate and acceleration sensor (airbag ECU assembly) connector.
(b) Clear the DTC.
Click here
Chassis > ABS/VSC/TRAC > Clear DTCs
(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON (READY).
(e) Perform a road test.
(f) Check if the same DTC is recorded.
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Chassis > ABS/VSC/TRAC > Trouble Codes
|
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.
Click here
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.
Click here
| A |
|
| B |
|
REPLACE AIRBAG ECU ASSEMBLY
|
|
|