Toyota Tacoma 2015-2018 Service Manual: Diagnosis System

Toyota Tacoma 2015-2018 Service Manual / Park Assist / Monitoring / Blind Spot Monitor System / Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair it.

2. CHECK DLC3

(a) Check the DLC3 (See page 3. DIAGNOSIS FUNCTION ).

3. DIAGNOSIS FUNCTION

(a) The blind spot monitor system displays an error message on the multi-information display to inform the driver that the system is unavailable either temporarily or due to a malfunction.

When the system is unavailable temporarily:
Multi-information display displays "BSM not available".
When the system is unavailable due to malfunction:
Multi-information display displays "Check BSM system".

4. ABNORMALITY HISTORY

HINT:

The abnormality history for a blind spot monitor sensor can be displayed or cleared.

(a) Check abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the Techstream on.

(4) Turn the blind spot monitor main switch assembly (warning canceling switch assembly) on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History

(6) Check the results displayed for the abnormality history check.

HINT:

If "Yes" is displayed, check the suspected area column for each item.
Abnormality history is stored only for the blind spot monitor sensor for which an abnormality has been detected.
If "No" is displayed, proceed to the next suspected area shown in Problem Symptoms Table (See page ).

Abnormality History Table

Tester Display	Item Explanation	Suspected Area
History of Module Blockage	History of blind spot monitor sensor detection problems due to snow, rain, etc. on the bumper	Check if a bumper compatible with the blind spot monitor (such as an original equipment bumper) is installed Check if any foreign matter is attached to the bumper Check if any foreign matter is present between the bumper and sensors
History of Low Voltage	History of low supply battery voltage from battery to the blind spot monitor sensor	Power Source Circuit (See page )
History of High Voltage	History of high supply battery voltage from battery to the blind spot monitor sensor	Power Source Circuit (See page )
History of Low Temperature	History of low temperature for the blind spot monitor sensor	Check the outside temperature
History of High Temperature	History of high temperature for the blind spot monitor sensor	Check the outside temperature

(b) Clearing abnormality history

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the Techstream on.

(4) Turn the blind spot monitor main switch assembly (warning canceling switch assembly) on.

(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History

(6) Clear the BSM Master Abnormal History and/or BSM Slave Abnormal History.

Terminals Of Ecu

TERMINALS OF ECU 1. BLIND SPOT MONITOR SENSOR LH (MASTER) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Cond ...

Dtc Check / Clear

DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the blind spot monitor main switch assembly (warning canceling switch assembly ...

Other materials:

IG Power Source Circuit
DESCRIPTION The main power source is supplied to the air conditioning amplifier assembly when the ignition switch is turned to ON. The power is used for operating the air conditioning amplifier assembly, servo motors, etc. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses ...

Charging Failure
PROCEDURE 1. CHECK GENERATOR PULLEY WITH CLUTCH (ON-VEHICLE INSPECTION) (a) Start the engine and visually check if the fan of the generator rotor assembly located inside the generator assembly is operating. OK: The fan of the generator rotor assembly is operati ...

IG2 Signal Malfunction (B2788)
DESCRIPTION This DTC is stored when the steering lock ECU (steering lock actuator or UPR bracket assembly) detects an IG2 power supply malfunction. HINT: The steering lock ECU (steering lock actuator or UPR bracket assembly) is not connected to the CAN communication system. However, the steer ...