Lighting System Diagnosis System

Body Electrical. Camry. Acv40 Gsv40
Lighting. Camry. Acv40 Gsv40

  1. DESCRIPTION

  1. CHECK DLC3

  1. INSPECT BATTERY VOLTAGE

Lighting System -- Diagnosis System



DESCRIPTION

  1. Lighting system data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.


CHECK DLC3
Camry. Acv40 Gsv40.Lighting.Lighting System.Lighting System Diagnosis System

  1. The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 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
    		11 to 14 V
    CANH (6) - CANL (14)
    		CAN bus line
    		Ignition switch OFF*
    		54 to 69 Ω
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Ignition switch OFF*
    		200 Ω or higher
    CANL (14) - CG (4)
    		LOW-level CAN bus line
    		Ignition switch OFF*
    		200 Ω or higher
    CANH (6) - BAT (16)
    		HIGH-level CAN bus line
    		Ignition switch OFF*
    		6 kΩ or higher
    CANL (14) - BAT (16)
    		LOW-level CAN bus line
    		Ignition switch OFF*
    		6 kΩ or higher
    NOTICE:
    *Before measuring the resistance, leave the vehicle as is for at least 1minute and do not operate the ignition switch, any other switches, or the doors.
    If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.


    2. Camry. Acv40 Gsv40.Lighting.Lighting System.Lighting System Diagnosis System

  2. Connect the cable of the intelligent tester to the DLC3, turn the ignition switch to the ON position 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.

    HINT:
    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.

INSPECT BATTERY VOLTAGE
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
Standard voltage:
11 to 14 V