Toyota Tundra Service Manual: Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the air conditioning control assembly (hazard warning signal switch) ON signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

(a) Using the Techstream, read the Data List.

Click here

OK:

Normal condition listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

(a) Remove the air conditioning control assembly (hazard warning signal switch).

Click here

(b) Inspect the air conditioning control assembly (hazard warning signal switch).

Click here

NG

REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HAZARD WARNING SIGNAL SWITCH)

OK

(a) Disconnect the J127 air conditioning control assembly (hazard warning signal switch) connector.

(b) Disconnect the J28 combination meter assembly connector.

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

Standard Resistance:

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR