Toyota Tundra Service Manual: Short to GND or Open in Buzzer (C1ABE)

Toyota Tundra Service Manual / Audio, Visual, Telematics / 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 LH detects a short to ground or open in the RCTA buzzer (blind spot monitor buzzer) circuit.

DTC No.	DTC Detection Condition	Trouble Area
C1ABE	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 LH RCTA buzzer (blind spot monitor buzzer) 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) Clear the DTCs.

Click here

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

Click here

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (RCTA BUZZER [BLIND SPOT MONITOR BUZZER] - BATTERY AND BLIND SPOT MONITOR SENSOR LH)

(a) Disconnect the P19 RCTA buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the S5 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P19-2 (BZN) - S5-3 (BUZ)	Always	Below 1 Ω
P19-2 (BZN) - Body ground or other terminals	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
P19-1 (BZP) - Body ground	Ignition switch ON	11 to 14 V
P19-1 (BZP) - Body ground	Ignition switch off	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK RCTA BUZZER (BLIND SPOT MONITOR BUZZER)

(a) Remove the RCTA buzzer (blind spot monitor buzzer) with a new or known good one.

for Double Cab:

Click here

for Crew Max:

Click here

(b) Clear the DTCs.

Click here

OK:

No DTCs are output.

END (RCTA BUZZER [BLIND SPOT MONITOR BUZZER] WAS DEFECTIVE)

REPLACE BLIND SPOT MONITOR SENSOR LH

Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete (C1ABC)

Master Module Horizontal Axis Misalignment (C1AC1)

See More:

Toyota Tundra Owners Manual > Operating the lights and wipers: Automatic High Beam
The Automatic High Beam uses an in-vehicle camera sensor to assess the brightness of streetlights, the lights of vehicles ahead etc., and automatically turns the high beam on or off as necessary. WARNING■Limitations of the Automatic High Beam Do not rely on the Automatic High Beam. Always ...