Lexus ES manuals

Lexus ES: Short to GND or Open in Buzzer (C1ABE)

DESCRIPTION

  • DTC C1ABE is stored when the blind spot monitor sensor LH detects a short to ground or open in the RCTA buzzer (blind spot monitor buzzer) circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1ABE

Short to GND or Open in Buzzer

Both of the following conditions are met:
  • The blind spot monitor system is on
  • The blind spot monitor sensor is not sounding the buzzer but the buzzer receives voltage below a specified level for a specified period of time.
  • RCTA buzzer (blind spot monitor buzzer)
  • Blind spot monitor sensor LH
  • Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When checking for DTCs, make sure that the blind spot monitor system is turned on.
  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (BLIND SPOT MONITOR SENSOR LH STATUS)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Blind Spot Monitor Slave / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Blind Spot Monitor Slave > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Buzzer Connection

Status of the buzzer connection

Valid or Invalid

Valid: Buzzer connection is valid

Invalid: Buzzer connection is invalid

-

Slave Side RCTA Function

Switches the RCTA function on and off

OFF or ON

OFF: RCTA function off

ON: RCTA function on

-

Body Electrical > Blind Spot Monitor Slave > Data List

Tester Display

Buzzer Connection

Slave Side RCTA Function

Result

Proceed to

"Valid" and "ON" is displayed for all items.

A

"Invalid" or "OFF" is displayed.

B

B

REPLACE BLIND SPOT MONITOR SENSOR LH

A

2.

CHECK DTC

(a) Turn the engine switch off.

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

(c) Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BATTERY AND BLIND SPOT MONITOR SENSOR LH)

(a) Disconnect the N28 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the R5 blind spot monitor sensor LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N28-2 (BZN) - R5-3 (BUZ)

Always

Below 1 Ω

N28-2 (BZN) or R5-3 (BUZ) - Body ground

Always

10 kΩ or higher

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

N28-1 (BZP) - Body ground

Engine switch on (IG)

11 to 14 V

N28-1 (BZP) - Body ground

Engine switch off

Below 1 V

OK

REPLACE RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ NEXT:

 Master Module Horizontal Axis Misalignment (C1AC1)

DESCRIPTION This DTC is stored when the angle of the blind spot monitor sensor RH deviates more than the allowable range from the horizontal axis. HINT: If a drum tester such as a speedometer teste

 Slave Module Horizontal Axis Misalignment (C1AC2)

DESCRIPTION This DTC is stored when the angle of the blind spot monitor sensor LH deviates more than the allowable range from the horizontal axis. HINT: If a drum tester such as a speedometer teste

 Customize Parameters

CUSTOMIZE PARAMETERS CUSTOMIZE BLIND SPOT MONITOR SYSTEM (a) Customizing with the Techstream NOTICE: When the customer requests a change in a function, first make sure that the function can be cust

SEE MORE:

 Precaution

PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System (for G

 Green Indicator Remains Off

DESCRIPTION After engine switch on (IG), the DCM (telematics transceiver) will enter into self check mode. The manual (SOS) switch red indicator will illuminate for 2 seconds and turn off followed by the manual (SOS) switch green indicator illuminating and remaining on under normal operation. If nei

© 2016-2023 Copyright www.lexguide.net