Inspection 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 / Main Body / Active Test.
5. Check the operation.

   Main Body (Main Body ECU) 

   MAIN BODY (MAIN BODY ECU) - ACTIVE TEST
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Hazard	Hazard	ON / OFF	-

   OK: 

   All hazard warning signal lights flash. 

OK:  Go to step  5

NG: Go to next step 

1. Remove the HAZ fuse from the engine room No. 1 relay block.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

1. Remove the turn signal flasher relay from the instrument panel junction block.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Specified Condition
   Junction Block turn signal flasher Relay terminal 4 (+B) - Body ground	10 to 14 V

   Fig 1: Locating Turn Signal Flasher Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Replace the turn signal flasher relay with a normally functioning one or a new one.
2. Check that the appropriate turn signal light flashes.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON.
5. Turn the Techstream on.
6. Enter the following menus: Body Electrical / Main Body / Active Test.
7. Check the operation.

   Main Body (Main Body ECU) 

   MAIN BODY (MAIN BODY ECU) - ACTIVE TEST
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Hazard	Hazard	ON/OFF	-

   OK: 

   All hazard warning signal lights flash. 

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR (JUNCTION BLOCK - HAZARD WARNING SIGNAL SWITCH) 

OK: REPLACE TURN SIGNAL FLASHER RELAY 

1. Remove the hazard warning signal switch.
2. Measure the resistance of the switch.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   1 - 4	OFF	10 kΩ or higher
   1 - 4	ON	Below 23.4 Ω

   Fig 2: Identifying Hazard Warning Signal Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HAZARD WARNING SIGNAL SWITCH 

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH BODY GROUND)