Ecd System Diagnosis System

  1. EURO-OBD

  1. M-OBD (EXCEPT EUROPEAN SPECIFICATION)

  1. NORMAL MODE AND CHECK MODE

  1. 2 TRIP DETECTION LOGIC

  1. FREEZE FRAME DATA

  1. BATTERY VOLTAGE

  1. MIL

  1. ALL READINESS

Ecd System -- Diagnosis System



EURO-OBD
When troubleshooting Europe On-Board Diagnostic (Euro-OBD) vehicles, the vehicle must be connected to the intelligent tester. Various data output from the vehicle Engine Control Module (ECM) can then be read.
The Malfunction Indicator Lamp (MIL) is illuminated when the vehicle on-board computer detects a malfunction in the computer itself or in drive system components. In addition, the applicable Diagnostic Trouble Codes (DTCs) are stored in the ECM memory (LandCruiser RM0000031HW07LX.html).
When the malfunction does not reoccur, the MIL stays illuminated until the ignition switch is turned off, and the MIL turns off when the engine is started. Be aware that the DTCs remain stored in the ECM memory.
To check DTCs, connect the intelligent tester to the DLC3 on the vehicle.
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

M-OBD (EXCEPT EUROPEAN SPECIFICATION)
When troubleshooting Multiplex On-Board Diagnostic (M-OBD) vehicles, the vehicle must be connected to the intelligent tester. Various data output from the vehicle Engine Control Module (ECM) can then be read.
The Malfunction Indicator Lamp (MIL) is illuminated when the vehicle on-board computer detects a malfunction in the computer itself or in drive system components. In addition, the applicable Diagnostic Trouble Codes (DTCs) are stored in the ECM memory (LandCruiser RM0000031HW07LX.html).
When the malfunction does not reoccur, the MIL stays illuminated until the ignition switch is turned off, and the MIL turns off when the engine is started. Be aware that the DTCs remain stored in the ECM memory.
To check DTCs, connect the intelligent tester to the DLC3 on the vehicle.

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 when simulating malfunction symptoms to increase increasing the ability of the system to detect malfunctions, including intermittent malfunctions (LandCruiser RM000000PDL0Y4X.html).

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 during the next subsequent drive cycle, the MIL is illuminated (2nd trip).

FREEZE FRAME DATA
The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

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

MIL


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. The MIL illuminates when the ignition switch is turned to ON and the engine is not running.

    HINT:
    If the MIL is not illuminated, check the MIL circuit (LandCruiser RM000000WZ11A8X.html).

  2. When the engine is started, the MIL should turn off. If the MIL remains on, the diagnosis system has detected a malfunction or abnormality in the ECD system.


ALL READINESS
HINT:
  1. With "All Readiness", you can check whether or not the DTC judgment has been completed by using the intelligent tester.
  2. Check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.

  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON.

  3. Turn the tester on.

  4. Clear the DTCs (LandCruiser RM000000PDK1DJX.html).

  5. Perform the DTC judgment driving pattern to run the DTC judgment.

  6. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  7. Input the DTCs to be confirmed.

  8. Check the DTC judgment result.

    Result
    Tester Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit