Toyota Tundra Service Manual: Integration Control and Panel Assembly Communication Error

DESCRIPTION

The LIN communication of the components related to the mirror heater occurs between the air conditioning amplifier assembly and air conditioning control assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the ignition switch OFF to troubleshoot:

Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.

PROCEDURE

(a) Disconnect the J127 air conditioning control assembly connector.

(b) Disconnect the J19 air conditioning amplifier assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Disconnect the J127 air conditioning control assembly connector.

*a Front view of wire harness connector (to Air Conditioning Control Assembly)

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

Standard Resistance:

Standard Voltage:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Temporarily replace the air conditioning control assembly with a new or normally functioning one (See page ).

(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS DEFECTIVE)

NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY