Brand:

Toyota

Model Name:

Yaris NCP90 91 92 93

Manual:

Repair Manual

Section:

1Nz-Fe Engine Control System

Title:

Sfi System

  1. Euro-obd (europe)

  2. M-obd (except european spec.)

  3. Normal mode and check mode

  4. 2-trip detection logic

  5. Dlc3 (data link connector 3)

  6. Inspect battery voltage

  7. Check mil



​

EURO-OBD (EUROPE)
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 illuminate the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in:
The emission control system components Yaris

  1. The emission control system components

  2. The powertrain control components (which affect vehicle emissions)

  3. The computerIn 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 an 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 the scan tool (Click here). Yaris

  4. 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 an 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 the scan tool (Click here).


M-OBD (EXCEPT EUROPEAN SPEC.)
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 illuminate the MIL on the instrument panel when the computer detects a malfunction in:
The emission control system/components Yaris

  1. The emission control system/components

  2. The powertrain 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 illuminated.

DLC3 (Data Link Connector 3)
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.Symbol (Terminal No.)Terminal DescriptionConditionSpecified ConditionSIL (7) - SG (5)Bus "+" lineDuring transmissionPulse generationCG (4) - Body groundChassis groundAlwaysBelow 1 ΩSG (5) - Body groundSignal groundAlwaysBelow 1 ΩBAT (16) - Body groundBattery positiveAlways11 to 14 VCANH (6) - CANL (14)CAN bus lineIgnition switch off*54 to 69 ΩCANH (6) - CG (4)HIGH-level CAN bus lineIgnition switch off*200 Ω or higherCANL (14) - CG (4)LOW-level CAN bus lineIgnition switch off*200 Ω or higherCANH (6) - BAT (16)HIGH-level CAN bus lineIgnition switch off*6 kΩ or higherCANL (14) - BAT (16)LOW-level CAN bus lineIgnition switch off*6 kΩ or higher Yaris

  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.

    Symbol (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 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 ON 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 is turned ON.
    If the MIL does not illuminate, there is a problem in the MIL circuit (Click here).

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