Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

Toyota Tacoma (2015-2018) Service Manual / Engine Immobiliser / Engine Immobiliser System(w/ Smart Key System) / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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 areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
If the problem only occurs in certain locations or at certain times of day, check for wave interference.
If the vehicle components are added, check for wave interference from the added components.

Engine Immobiliser System (w/ Smart Key System)

Symptom	Suspected Area	See page
Security indicator light does not blink	Proceed to "Security Indicator Light Does not Blink"
Engine immobiliser system does not operate properly	Proceed to "Immobiliser System does not Operate Properly"
Engine cannot be started*1	Certification ECU (smart key ECU assembly)
	ECM
	SFI system
Power source mode cannot be changed*1	Engine switch
Power source mode cannot be changed*1	Certification ECU (smart key ECU assembly)
Steering lock lock/unlock not possible*2	Steering lock ECU (steering lock actuator or upr bracket assembly)

*1: Refer to Problem Symptoms Table for Smart Key System (for Start Function).
*2: Refer to Problem Symptoms Table for Steering Lock System.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use this procedure to troubleshoot the engine immobiliser system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO W ...

Registration

REGISTRATION PROCEDURE 1. DESCRIPTION OF CODE REGISTRATION HINT: Registering an ID code enables the entry and start function, wireless door lock control function and engine immobiliser ...

Other materials:

New Key cannot be Registered
DESCRIPTION If an electrical key transmitter could not be newly registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, steering lock ECU (steering lock actuator or UPR bracket assembly) or electrical key and T ...

Rear Occupant Classification Sensor RH Collision Detection (B1788)
DESCRIPTION DTC B1788 is set when the occupant detection ECU receives a collision detection signal, which is sent by the occupant classification sensor rear RH when an accident occurs. DTC B1788 is also set when the front seat with adjuster frame assembly RH is subjected to a strong impact, ...

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. PRECAUTION NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the ...