Hazard Warning Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
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 warning signal switch signal/ON or OFF	ON: Hazard warning signal switch on OFF: Hazard warning signal switch off	-

   OK

   The display is as specified in the normal condition column.

   Result

   Result	Proceed to
   NG	A
   OK	B

B → REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: Go to next step 

1. Remove the hazard warning signal switch assembly. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Checking Resistance Of Hazard Warning Signal Switch Assembly With Connector End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   3 (F) - 5 (E)	Hazard warning switch off	10 kΩ or higher
   	Hazard warning switch on	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Hazard Warning Signal Switch Assembly)

NG → See step   4 

OK: Go to next step 

1. Disconnect the L27 combination meter sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L57-3 (F) - L27-4 (HAZ)	Always	Below 1 Ω
   L57-5 (E) - Body Ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   L57-3 (F) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5