Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HAZARD WARNING SIGNAL SWITCH ASSY

Check the hazard warning switch continuity, as shown in the illustration and table.

Standard:

TERMINAL SPECIFIED CONDITION

Terminal No.	Switch position	Specified condition
-	Switch OFF	Continuity
2 <=> 3	Switch ON	Continuity
4 <=> 5	Illumination circuit	Continuity

Fig 1: Identifying Hazard Warning Signal Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HAZARD WARNING SIGNAL SWITCH ASSY
OK: GO TO NEXT STEP.

CHECK TURN SIGNAL FLASHER ASSY (See ON-VEHICLE INSPECTION )
1. NG: REPLACE TURN SIGNAL FLASHER ASSY
2. OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (TVIP ECU <=> TURN SIGNAL FLASHER)

Disconnect the TVIP ECU and turn signal flasher connectors.

Check the continuity between the terminals of the TVIP ECU and turn signal flasher connectors, as shown in the illustration and table.

Standard:

TERMINAL SPECIFIED CONDITION

Symbols (Terminal No.) (TVIP ECU <=> Turn Signal Flasher)	Specified condition
HAZD (T3-8) <=> HAZ (T2-8)	Continuity

Fig 2: Disconnecting TVIP ECU And Turn Signal Flasher Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (HAZARD WARNING SWITCH <=> BODY GROUND)

Disconnect the hazard warning switch connector.

Check the continuity between the terminal of the hazard warning switch connector and the body ground, as shown in the illustration and table.

Standard:

TERMINAL SPECIFIED CONDITION

Symbols (Terminal No.) (Hazard warning SW <=> Body ground)	Specified condition
H7-2 <=> Body ground	Continuity

Fig 3: Disconnecting Hazard Warning Switch Connector

NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK: CHECK AND REPLACE TVIP ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )