Toyota Tundra Service Manual: Security Indicator Light Does not Blink

DESCRIPTION

The transponder key ECU assembly blinks the security indicator light when the engine immobiliser is set.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the transponder key ECU assembly is replaced, refer to Registration.

Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

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

Immobiliser

Tester Display

Test Part

Control Range

Diagnostic Note

Security Indicator

Security indicator light

ON/OFF

-

OK:

Security indicator light can be turned on and off using the Techstream.

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY

NG

2.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT))

(a) Disconnect the J26 transponder key ECU assembly connector.

(b) Disconnect the J28 combination meter assembly (security indicator light) connector.

(c) Disconnect the J165 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J28-36 (LP) - J26-8 (IND)

Always

Below 1 Ω

J28-36 (LP) - Body ground

Always

10 kΩ or higher

J26-8 (IND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK TRANSPONDER KEY ECU ASSEMBLY (TERMINAL IND)

(a) Connect the J26 transponder key ECU assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

J28-36 (LP) - Body ground

Ignition switch off

Pulse generation

Ignition switch ON

Below 1 V

*a

Front view of wire harness connector

(to Combination Meter Assembly (Security Indicator Light))

OK

REPLACE COMBINATION METER ASSEMBLY (SECURITY INDICATOR LIGHT)

NG

REPLACE TRANSPONDER KEY ECU ASSEMBLY

    Registration

    System Description

    See More:

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