Pre-Crash Safety System Diagnosis System

Restraints. Lexus Gs430, Gs300. Uzs190 Grs190
Pre-Crash Safety. Lexus Gs430, Gs300. Uzs190 Grs190

  1. CHECK DLC3

  1. FUNCTION OF WARNING INDICATOR AND MESSAGE

Pre-Crash Safety System -- Diagnosis System



CHECK DLC3
Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System.Pre-Crash Safety System Diagnosis System

  1. The seat belt control ECU uses CAN and ISO 14230 (m-0130) communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 14230 (m-0130) format.

    Symbols (Terminal No.)
    		Terminal Description
    		Condition
    		Specified Condition
    SIL (7) - SG (5)
    		Bus "+" line
    		During transmission
    		Pulse generation
    CG (4) - Body ground
    		Chassis ground
    		Always
    		Below 1 Ω
    SG (5) - Body ground
    		Signal ground
    		Always
    		Below 1 Ω
    BAT (16) - Body ground
    		Battery positive
    		Always
    		10 to 14 V
    CANH (6) - CANL
    		HIGH - level CAN bus line
    		Engine switch off
    		54 to 67 Ω
    CANH (6) - Battery positive
    		HIGH - level CAN bus line
    		Engine switch off
    		1 MΩ or higher
    CANH (6) - CG (4)
    		HIGH - level CAN bus line
    		Engine switch off
    		3 MΩ or higher
    CANL (14) - Battery positive
    		LOW - level CAN bus line
    		Engine switch off
    		1 MΩ or higher
    CANL (14) - CG (4)
    		LOW - level CAN bus line
    		Engine switch off
    		3 MΩ or higher
    If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT:
Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System.Pre-Crash Safety System Diagnosis System
Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
  1. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
  2. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.

FUNCTION OF WARNING INDICATOR AND MESSAGE


  1. If the pre-crash safety system is not functioning properly, the driver is warned through the combination meter's master warning indicator and multi-information display warning message.


    Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System.Pre-Crash Safety System Diagnosis System

  2. Initial check.

    1. The initial check occurs when the engine switch is off for more than 2 seconds, and then turned on (IG). The initial check consists of a pre-crash safety system diagnostic check with a duration of approximately 3 seconds.

    2. If a malfunction is detected during the initial check, the multi-information display will output "Check PCS " or "PCS DISABLED Now".

  3. Constant check.

    1. The seat belt control ECU and cruise control ECU assembly (distance control ECU) constantly monitor the pre-crash safety system for malfunctions after the initial check (approximately 3 seconds after turning the engine switch on (IG)).

    2. "Check PCS" or "PCS DISABLED Now" is displayed on the multi-information display in the combination meter assembly when the constant check detects malfunctions in the pre-crash safety system.

  4. Review.

    Master Warning Indicator
    		Warning Message
    		Detail
    		DTC
    		PCS Warning Indicator
    Illuminate
    		Check PCS
    		This message appears when the seat belt control ECU detects a system malfunction
    		○
    		ON
    Illuminate
    		PCS DISABLED Now
    		This message appears when the seat belt control ECU is in the fail-safe mode (Click here)
    		-
    		Blinking