Hazard Warning Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. Read the display on the Techstream.
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Hazard Flasher Switch	Hazard switch signal/ON or OFF	ON: Hazard switch on OFF: Hazard switch off	-

   OK

   Normal conditions listed above are displayed.

NG → See step   2 

OK → See step   5 

1. Remove the air conditioning control assembly. Refer to REMOVAL .
   Fig 1: Inspecting Air Conditioning Control Assembly (Hazard Switch) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   4 (HAZ) - 6 (GND)	Hazard switch on	Below 1 Ω
   4 (HAZ) - 6 (GND)	Hazard switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Air Conditioning Control Assembly (Hazard Switch))

NG → See step   6 

OK: Go to next step 

1. Disconnect the I17 combination meter assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I56-4 (HAZ) - I17-5 (HAZ)	Always	Below 1 Ω
   I56-4 (HAZ) - Body ground	Always	10 kΩ or higher
   I56-6 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4