Toyota Tundra Service Manual: A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)

DESCRIPTION

This DTC is stored when items controlled by the Air conditioning amplifier assembly cannot be customized via the navigation system vehicle customization screen.

HINT:

The Air conditioning amplifier assembly controls the air conditioning system related items that are customizable via the navigation receiver assembly screen.

PROCEDURE

(a) Use the Techstream to check if the CAN communication system is functioning normally (See page ).

OK:

CAN communication DTCs are not output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

(a) Check if the air conditioning system is malfunctioning (See page ).

HINT:

Customization may not be possible depending on the malfunction in the air conditioning system.

OK:

No malfunctions are present in the air conditioning system.

NG

GO TO AIR CONDITIONING SYSTEM

OK

(a) Display the "Vehicle Customization" screen.

(b) Make a note of the customizable items for the air conditioning system.

HINT:

These air conditioning system items shown as customizable via the navigation receiver assembly vehicle customization screen can also be changed using the Techstream. In the following steps, the Techstream will be used.

(1) To match-up the items in the navigation receiver assembly with the items on the Techstream, check the customize parameters list for the air conditioning system related items that can be customized via the navigation receiver assembly screen (See page ).

(c) Using the Techstream, confirm that it is possible to change the settings of the air conditioning system related customize parameters that are shown as customizable via the navigation receiver assembly screen.

OK:

The items available for customization via the navigation receiver assembly screen can be customized successfully using the Techstream.

A

REPLACE NAVIGATION RECEIVER ASSEMBLY

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY