Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Security Indicator Light Does not Blink

DESCRIPTION

  • The certification ECU (smart key ECU assembly) blinks the security indicator light when the immobiliser is set (engine switch off, or driver door is opened and closed with engine switch on (IG)).
  • The certification ECU (smart key ECU assembly) receive the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is arming preparation state or alarm sounding state. Then, certification ECU (smart key ECU assembly) blinks the security indicator light.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the certification ECU (smart key ECU assembly), refer to the Registration (See page The engine immobiliser system (w/ Smart Key System) uses the CAN communication ).
  • The engine immobiliser system (w/ Smart Key System) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page the engine immobiliser system (w/ Smart Key System) after confirming that ). Troubleshoot the engine immobiliser system (w/ Smart Key System) after confirming that the communication systems are functioning properly.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Key / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Smart Key

Tester Display

Test Part

Control Range

Diagnostic Note

Immobiliser Indicator

Security indicator light

OFF/ON

-

OK:

The security indicator light operates normally.

NG

GO TO STEP 3

OK

2.

CHECK SECURITY INDICATOR LIGHT OPERATION

(a) When the immobiliser is set, check that the security indicator light blinks.*1

OK:

The security indicator light blinks normally.

(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light on (See page ).*2 ).*2

OK:

The security indicator light is on normally.

Result

Result

Proceed to

*1 is NG (*2 is OK)

A

*2 is NG (*1 is OK)

B

A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

3.

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the A33 security indicator light (air conditioning control assembly) connector.

(b) Disconnect the C29 certification ECU (smart key ECU assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A33-6 (LP) - C29-19 (IND)*1

Always

Below 1 Ω

A33-6 (LP) or C29-19 (IND) - Body ground*1

Always

10 kΩ or higher

A33-1 (GND) - Body ground*1

Always

Below 1 Ω

A33-12 (LP) - C29-19 (IND)*2

Always

Below 1 Ω

A33-12 (LP) or C29-19 (IND) - Body ground*2

Always

10 kΩ or higher

  • *1: for Automatic Air Conditioning System
  • *2: for Manual Air Conditioning System
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Reconnect the C29 certification ECU (smart key ECU assembly) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A33-6 (LP) - A33-1 (GND)*1

Engine switch off → engine switch on (IG)

Pulse generation → Below 2 V

A33-12 (LP) - A33-1 (GND)*2

Engine switch off → engine switch on (IG)

Pulse generation → Below 2 V

  • *1: for Automatic Air Conditioning System
  • *2: for Manual Air Conditioning System
Result

Result

Proceed to

OK (for Automatic Air Conditioning System)

A

OK (for Manual Air Conditioning System)

B

NG

C

A

REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY)

B

REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY)

C

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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