LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> Prius Four >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Safety Connect System (Plug-In) (Diagnostics - Introduction)) >> Safety Connect System >> Diagnosis System >> Diagnosis System
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis System

WARNING: This page is about a different variant/trim than selected.
  1. DESCRIPTION 
    1. The DCM (Telematics Transceiver) controls the vehicle Safety Connect system functions. Safety Connect system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a malfunction may be occurring in the Safety Connect system. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
  2. CHECK DLC3 
    1. Check the DLC3. Refer to GENERAL INFORMATION .
  3. INSPECT AUXILIARY BATTERY VOLTAGE 
    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the auxiliary battery.

  4. CHECK INDICATOR 
    1. When a malfunction is detected in the Safety Connect system, the manual (SOS) switch red indicator on the manual (SOS) switch illuminates to inform the driver of the malfunction. Refer to SYSTEM DESCRIPTION .