Diagnosis System

FUNCTION OF WARNING LIGHT AND MESSAGE
1. If a malfunction occurs during system operation, the master warning light on the combination meter comes on and "Check VGRS System" will be displayed on the multi-information display to inform the driver of the system malfunction.
  
  Fig 1: Identifying VGRS System On Multi-Information Display
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC
1. Normal mode.
  1. DTCs are stored in the steering control ECU and read using the Techstream. Refer to DTC CHECK / CLEAR .
2. Test mode.
  1. By switching from normal mode to test mode, the steering angle sensor can be inspected. Refer to TEST MODE PROCEDURE .
    HINT:
    
    Whether the system is in normal mode or test mode can be checked from the indication on the multi-information display. For details of the indication and how to check, refer to "DTC Check/Clear". Refer to DTC CHECK / CLEAR .

CHECK MASTER WARNING LIGHT

Turn the engine switch on (IG).

Fig 2: Identifying Master Warning Light Indicator
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check that the master warning light comes on for 2 seconds.

HINT:

If the master warning light (VGRS) check result is not normal, proceed to troubleshooting of the warning light circuit.

Trouble Area	See Procedure
Master warning light circuit	Refer to Master Warning Light Malfunction