Toyota CH-R Service Manual: Short to GND or Open in Buzzer (C1ABE)

Toyota CH-R Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Short to GND or Open in Buzzer (C1ABE)

DESCRIPTION

DTC C1ABE is stored when the blind spot monitor sensor RH (Slave) 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.	Blind spot monitor sensor RH (Slave) RCTA buzzer (blind spot monitor buzzer) 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

CHECK DTC

(a) Turn the ignition switch off.

(b) Turn the ignition switch to ON.

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BATTERY AND BLIND SPOT MONITOR SENSOR RH (SLAVE))

(a) Disconnect the M64 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the M63 blind spot monitor sensor RH (Slave) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
M64-2 (BZN) - M63-3 (BUZ)	Always	Below 1 Ω
M64-2 (BZN) - Body ground	Always	10 kΩ or higher

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
M64-1 (BZP) - Body ground	Ignition switch to ON	11 to 14 V
M64-1 (BZP) - Body ground	Ignition switch off	Below 1 V

*a	Component with harness connected RCTA buzzer (blind spot monitor buzzer)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

(a) Replace the RCTA buzzer (blind spot monitor buzzer).

Click here

CHECK DTC

(a) Clear the DTCs.

Click here

Body Electrical > Blind Spot Monitor Slave > Clear DTCs

(b) 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.

END

REPLACE BLIND SPOT MONITOR SENSOR RH (SLAVE)

Software Incompatibility with Body Control Module "B" (U1331)

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