Sfi System Diagnosis System

Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40

  1. EURO-OBD

  1. M-OBD

  1. NORMAL MODE AND CHECK MODE

  1. 2-TRIP DETECTION LOGIC

  1. DLC3 (Data Link Connector 3)

  1. INSPECT BATTERY VOLTAGE

  1. CHECK MIL

Sfi System -- Diagnosis System



EURO-OBD
When troubleshooting Europe On-Board Diagnostic (Euro-OBD) vehicles, the vehicle must be connected to an OBD scan tool (complying with ISO 15765-4). Various data output from the vehicle's ECM can then be read.
Euro-OBD regulations require that the vehicle's on-board computer illuminates the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in:
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Diagnosis System

  1. The emission control system components.

  2. The power train control components (which affect vehicle emissions).



    3. Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Diagnosis System

  3. The computer
    In addition, if the applicable Diagnostic Trouble Codes (DTCs) prescribed by ISO 15765-4 are recorded in the ECM memory. If the malfunction does not reoccur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the ECM memory.
    To check DTCs, connect the intelligent tester or OBD scan tool to the Data Link Connector 3 (DLC3) of the vehicle.
    The scan tool displays DTCs, the freeze frame data and a variety of engine data.
    The DTCs and freeze frame data can be erased using the scan tool (CAMRY_ACV40 RM000000PDK081X.html).


M-OBD
When troubleshooting Multiplex On-Board Diagnostic (M-OBD) vehicle, the vehicle must be connected to the intelligent tester. Various data output from the ECM can then be read.
OBD regulations require that the vehicle's on-board computer illuminates the MIL on the instrument panel when the computer detects a malfunction in:
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Diagnosis System

  1. The emission control system/components.

  2. The power train control components (which affect vehicle emissions).

  3. The computer
    In addition, the applicable DTCs are recorded in the ECM memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the ECM memory.


NORMAL MODE AND CHECK MODE
The diagnosis system operates in "normal mode" during normal vehicle use. In normal mode, "2 trip detection logic" is used to ensure accurate detection of malfunctions. "Check mode" is also available to technicians as an option. In check mode, "1 trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunctions (intelligent tester only).

2-TRIP DETECTION LOGIC
When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the same malfunction is detected again after the ignition switch is turned off and then ON position, the MIL will be illuminated.

DLC3 (Data Link Connector 3)


    Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Diagnosis System

  1. The ECM uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 15765-4 format. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

    Symbol
    		Terminal No.
    		Name
    		Reference terminal
    		Result
    		Condition
    SIL
    		7
    		Bus "+" line
    		5 - Signal ground
    		Pulse generation
    		During transmission
    CG
    		4
    		Chassis ground
    		Body ground
    		1 Ω or less
    		Always
    SG
    		5
    		Signal ground
    		Body ground
    		1 Ω or less
    BAT
    		16
    		Battery positive
    		Body ground
    		9 to 14 V
    CANH
    		6
    		CAN "High" Line
    		14 - CANL
    		54 to 69 Ω
    		Ignition switch off*
    Battery positive
    		6 kΩ or higher
    4 - CG
    		200 Ω or higher
    CANL
    		14
    		CAN "Low" Line
    		Battery positive
    		6 kΩ or higher
    4 - CG
    		200 Ω or higher
    NOTICE:
    *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors.
    HINT:
    Connect the cable of an 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.
    If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
    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, replace the battery before proceeding to the next step.
Battery Voltage:
11 to 14 V

CHECK MIL

  1. Check that the MIL illuminates when the ignition switch turns to the ON position.
    If the MIL does not illuminate, there is a problem in the MIL circuit (CAMRY_ACV40 RM000000WZ107VX.html).

  2. When the engine is started, the MIL should turn off.