Toyota Tundra Service Manual: Diagnosis System

DIAGNOSIS SYSTEM

CHECK DLC3

(a) Check the DLC3.

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INSPECT BATTERY VOLTAGE

(a) Measure the vehicle battery voltage.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery.

SELF-DIAGNOSTIC MODE

(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 / Main Body / Utility / Wireless Door Lock Diagnosis Mode.

(e) Proceed to the next step in accordance with the prompts on the Techstream screen.

(f) Check that the system has switched to self-diagnostic mode by checking the interior light output pattern.

(g) Check that the system has switched to self-diagnostic mode by checking the wireless door lock buzzer output pattern.

(h) Check the diagnostic outputs when a door control transmitter assembly switch is pressed. The diagnostic outputs can be checked by the interior light and wireless door lock buzzer patterns.

Result

Interior Light Output

Suspected Area

A

Normal (No malfunction)

B

Register wireless code

C

Wave interference or malfunction of a related component

    Data List / Active Test

    How To Proceed With Troubleshooting

    See More:

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    DESCRIPTION DTC B1785 is set when the occupant classification ECU receives a collision detection signal, which is sent by the front occupant detection sensor LH when an accident occurs. DTC B1785 is also set when the front seat frame with adjuster RH is subjected to a strong impact, even if an actua ...

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    Toyota Tundra Service Manual

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