Toyota Tacoma (2015-2018) Service Manual: Lost Communication with Blind Spot Monitor Slave Module (U0232)

Toyota Tacoma (2015-2018) Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Lost Communication with Blind Spot Monitor Slave Module (U0232)

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH.

DTC Code	DTC Detection Condition	Trouble Area
U0232	The blind spot monitor sensor LH cannot receive signals from the blind spot monitor sensor RH.	CAN communication Line Harness or connector Blind spot monitor sensor LH Blind spot monitor sensor RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor 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

1.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the B12 blind spot monitor sensor LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
B12-1 (CA2P) - B13-1 (CA2P)	Always	Below 1 Ω
B12-6 (CA2N) - B13-6 (CA2N)	Always	Below 1 Ω

REPAIR OR REPLACE CAN LINE OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BATTERY AND BODY GROUND)

(a) Disconnect the blind spot monitor sensor RH connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B13-5 (BLB) - Body ground	Ignition switch ON	11 to 14 V
B13-5 (BLB) - Body ground	Ignition switch off	Below 1 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
B13-10 (BRGD) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK BLIND SPOT MONITOR SENSOR RH

(a) Replace the blind spot monitor sensor RH with a new or normally functioning one (See page (b) Clear the DTCs (See page ). ).

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

OK:

No DTCs are output.

END (BLIND SPOT MONITOR SENSOR RH WAS DEFECTIVE)

REPLACE BLIND SPOT MONITOR SENSOR LH

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

DESCRIPTION This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors. DTC Code ...

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 ...

Other materials:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3). When th ...

Engine Control System Malfunction (C1201)
DESCRIPTION If a malfunction in the engine control system is detected, VSC and TRAC operations are prohibited by the fail-safe function. DTC No. Detection Item DTC Detection Condition Trouble Area C1201 Engine Control System ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the causes of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected area ...