Active Torque Control 4Wd System Diagnosis System

Drive Line. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Differential. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

  1. DESCRIPTION

  1. CHECK DLC3

  1. FUNCTION OF 4WD INDICATOR LIGHT

  1. CHECK 4WD INDICATOR LIGHT (w/ Multi-information Display)

Active Torque Control 4Wd System -- Diagnosis System



DESCRIPTION
Active torque control 4WD system data can be read in 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. Therefore when there seems to be a problem with the active torque control 4WD, use the intelligent tester or SST to check and troubleshoot it.
SST
09843-18040

CHECK DLC3
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System

  1. The vehicle's ECU uses the ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
    Verify the conditions listed in the table below.

    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 1Ω
    SG (5) - Body Ground
    		Signal ground
    		Always
    		Below 1Ω
    BAT (16) - Body Ground
    		Battery positive
    		Always
    		11 to 14 V
    CANH (6) - CANL (14)
    		HIGH-level CAN bus line
    		Ignition switch off *
    		54 to 69 Ω
    CANH (6) - BAT (16)
    		HIGH-level CAN bus line
    		Ignition switch off *
    		1 MΩ or higher
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Ignition switch off *
    		200 Ω or higher
    CANL (14) - BAT (16)
    		LOW-level CAN bus line
    		Ignition switch off *
    		1 MΩ or higher
    CANL (14) -CG (4)
    		LOW-level CAN bus line
    		Ignition switch off *
    		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, 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.
    HINT:
    Connect the cable of the intelligent tester to the DLC3, turn the ignition 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.
    1. 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 4WD INDICATOR LIGHT

  1. The 4WD indicator light in the combination meter (multi-information display) warns the driver of abnormal or poor condition of the 4WD control system.

  2. w/o Multi-information display:
    If the 4WD control ECU detects a malfunction, the 4WD indicator lights comes on in accordance with the trouble area to warn the driver.

  3. w/ Multi-information display:
    If the 4WD control ECU detects a malfunction, the check master caution indicator comes on (*1) and the multi-information display displays warning messages (*2) in accordance with the trouble area to warn the driver.

    HINT:
    Check that the master caution indicator comes on for approximately 4 seconds. (*1)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System


CHECK 4WD INDICATOR LIGHT (w/ Multi-information Display)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System

  1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3 (to enter diagnostic mode).

    SST
    09843-18040

  2. Turn the ignition switch on (IG).



    3. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System
    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System

  3. "DIAG" is displayed on the multi-information display, and the 4WD control ECU checks the system for malfunctions.

    1. If the 4WD control system is normal, "4WD FF" will be displayed on the multi-information display.
    1. If the 4WD control system is not normal, " 4WD XX (DTC)" will be displayed on the multi-information display.

    1. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Differential.Active Torque Control 4Wd System.Active Torque Control 4Wd System Diagnosis System
      Although the test mode is not set for the 4WD control system, the message shown in the illustration will be displayed on the multi-information display when the test mode is activated for checking the VSC, etc.
      HINT:
      1. Test mode DTCs will not be stored because the test mode is not set.
      1. On the multi-information display, VSC, TIRE PRESSURE and 4WD are displayed in order.
      1. If the systems above are not displayed on the multi-information display, there may be a malfunction in "TC and CG Terminal Circuit".
      1. If the 4WD indicator light check result is not normal, proceed to troubleshooting for the 4WD indicator light circuit.
      Trouble Area
      		See procedure
      4WD indicator light (Remains on)
      		RAV4_ACA30 RM0000020BJ00MX.html
      4WD indicator light (Does not come on)
      		RAV4_ACA30 RM0000020BK00JX.html