Toyota Tacoma (2015-2018) Service Manual: Short to +B in Buzzer (C1ABD,C1ABE)

Toyota Tacoma (2015-2018) Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Short to +B in Buzzer (C1ABD,C1ABE)

DESCRIPTION

DTC C1ABD is stored when the blind spot monitor sensor RH detects a +B short in rear cross traffic alert buzzer (blind spot monitor buzzer) circuit.
DTC C1ABE is stored when the blind spot monitor sensor RH detects a ground short or open in rear cross traffic alert buzzer (blind spot monitor buzzer) circuit.

DTC Code	DTC Detection Condition	Trouble Area
C1ABD	Both of the following conditions are met: Blind spot monitor main switch assembly (warning canceling switch assembly) is on with ignition switch ON. The blind spot monitor sensor is not sending voltage to the buzzer but the buzzer receives voltage above a specified level for a specified period of time.	Blind spot monitor sensor RH Rear cross traffic alert buzzer (blind spot monitor buzzer) Harness or connector
C1ABE	Both of the following conditions are met: Blind spot monitor main switch assembly (warning canceling switch assembly) is on with ignition switch ON. The current flowing to the buzzer is below a specified value when buzzer operation voltage is being sent to the buzzer.	Blind spot monitor sensor RH Rear cross traffic alert buzzer (blind spot monitor buzzer) Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot main switch assembly (warning canceling switch assembly) is on.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

CHECK DTC

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

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

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (REAR CROSS TRAFFIC ALERT BUZZER - BATTERY AND BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the R37 rear cross traffic alert buzzer (blind spot monitor buzzer) connector.

(b) Disconnect the B13 blind spot monitor sensor RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R37-2 (BZN) - B13-3 (BUS)	Always	Below 1 Ω
R37-2 (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
R37-1 (BZP) - Body ground	Ignition switch ON	11 to 14 V
R37-1 (BZP) - Body ground	Ignition switch off	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE BLIND SPOT MONITOR BUZZER (REAR CROSS TRAFFIC ALERT BUZZER)

(a) Replace the rear cross traffic alert buzzer (blind spot monitor buzzer) with a new or normally functioning one.

for Access Cab:
for Double Cab:

CHECK DTC

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

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

OK:

No DTCs are output.

END (REAR CROSS TRAFFIC ALERT BUZZER (BLIND SPOT MONITOR BUZZER) WAS DEFECTIVE)

REPLACE BLIND SPOT MONITOR SENSOR RH

Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0142)

DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the blind spot monitor sensor. HINT: If CAN communication system DTCs are stored, they may ...

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

DESCRIPTION This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor RH. HINT: This DTC is always stored after replacing a blind spot monitor sensor ...

Other materials:

AV Signal Stoppage (Low Battery Voltage) (B158F)
DESCRIPTION This DTC is stored when a video or audio signal is interrupted due to battery voltage input to the navigation receiver assembly dropping temporarily. DTC Code DTC Detection Condition Trouble Area B158F A video or audio sign ...

Installation
INSTALLATION PROCEDURE 1. INSTALL GENERATOR ASSEMBLY (a) Install the generator bracket to the generator assembly with the bolt. Torque: 20 N·m {204 kgf·cm, 15 ft·lbf} (b) Install the generator assembly with the 2 bolts. Torque: 43 N·m {438 kgf·cm, 32 ft·lbf} (c) Connect the generato ...

No Response from Steering Lock ECU (B2786)
DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) stops for 10 seconds or more. DTC No. DTC Detection Condition Trouble Area ...