Lexus ES manuals

Lexus ES: Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range (C14D71C)

Lexus ES (XZ10) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Gasoline Model) / Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range (C14D71C)

DESCRIPTION

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

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 ECU assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C14D71C

Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range

Vehicle speed is 6 km/h (4 mph) or more and yaw rate and acceleration sensor power supply malfunction signal is received for 1 second or more.

  • Wire harness or connector
  • Yaw rate sensor (airbag ECU assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • After replacing or reinstalling the yaw rate and acceleration sensor (airbag ECU assembly), perform acceleration sensor zero point calibration and store system information memorization after performing "Reset Memory".

    Click here

  • When removing/installing a supplemental restraint systems related component, disconnect the cable from the negative (-) battery terminal before performing the procedure.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Turn the engine switch off.

*a

Front view of wire harness connector

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

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Click here

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

OK:

The connector is securely connected.

(d) Disconnect the G64 yaw rate and acceleration sensor (airbag ECU assembly) connector.

(e) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(f) Connect the cable to the negative (-) battery terminal.

(g) Turn the engine switch on (IG).

(h) Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G64-36 (IG2) - Body ground

Engine switch on (IG)

8 to 16 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK

2.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the engine switch off.

*a

Front view of wire harness connector

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

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

Click here

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

OK:

The connector is securely connected.

(d) Disconnect the G64 yaw rate and acceleration sensor (airbag ECU assembly) connector.

(e) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G64-33 (E1) - Body ground

Always

Below 1 Ω

G64-32 (E2) - Body ground

Always

Below 1 Ω

OK

REPLACE AIRBAG ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

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