Toyota CH-R Service Manual: Acceleration Sensor Power Supply Voltage Malfunction (C1381)

Toyota CH-R Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Acceleration Sensor Power Supply Voltage Malfunction (C1381)

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) receives a sensor supply voltage malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1381

Acceleration Sensor Power Supply Voltage Malfunction

Vehicle speed is 6 km/h (4 mph) or higher and yaw rate and acceleration sensor power supply malfunction signal is received for 1.1 seconds or more.
  • Acceleration sensor power source circuit
  • Acceleration sensor (airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1234, C1472 and C1474.

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CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

*a

Front view of wire harness connector

(to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

(b) Disconnect the F70 yaw rate and acceleration sensor (airbag sensor assembly) connector.

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

F70-21 (IG2) - Body ground

Ignition switch ON

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK

2.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F70-25 (E1) - Body ground

Always

Below 1 Ω

F70-26 (E2) - Body ground

Always

Below 1 Ω

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.

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OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)
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