VARIABLE GEAR RATIO STEERING SYSTEM TERMINALS OF ECU


  1. CHECK STEERING CONTROL ECU

    Tech Tips

    Inspect the connectors from the back side while they are connected.

    A015E1VE05
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    E77-3 (IG) - E77-7 (PGND) G - W-B Power supply (ECU-IG No. 4 fuse) Engine switch on (IG) 11 to 14 V
    E77-7 (PGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    E77-8 (PIG) - E77-7 (PGND) B - W-B Power supply (VGRS fuse) Engine switch on (IG) 11 to 14 V
    E77-10 (+B1) - E77-7 (PGND) R - W-B Power supply (ECU-B1 fuse) Always 11 to 14 V
    E78-1 (BMV) - E77-7 (PGND) W - W-B Steering actuator motor signal (V phase) Engine running Sine wave
    E78-2 (BMU) - E77-7 (PGND) B - W-B Steering actuator motor signal (U phase) Engine running Sine wave
    E78-3 (BMW) - E77-7 (PGND) R - W-B Steering actuator motor signal (W phase) Engine running Sine wave
    E78-6 (SG) - E78-8 (PGD2) BR - W-B Steering actuator motor signal shielded ground Always Below 1 Ω
    E78-8 (PGD2) - Body ground W-B - Body ground Steering control ECU ground Always Below 1 Ω
    E79-1 (+BO) - E77-7 (PGND) R - W-B Steering angle sensor power supply line Always 11 to 14 V
    E79-3 (LV) - E77-7 (PGND) B - W-B Power source for steering actuator lock Engine switch on (IG) 11 to 14 V
    E79-4 (S1) - E77-7 (PGND) R - W-B Steering actuator motor rotation angle sensor signal Engine switch on (IG) Sine wave
    E79-6 (RV) - E77-7 (PGND) W- W-B Steering actuator resolver excitation output voltage Engine switch on (IG) Sine wave
    E79-7 (SIL) - E77-7 (PGND) R - W-B Diagnostic communication signal Engine switch on (IG) Pulse generation
    E79-9 (CANH) - E79-20 (CANL) LG - L CAN communication Engine switch on (IG) Pulse generation
    E79-10 (SS1-) - E77-7 (PGND) GR - W-B Steering angle sensor signal Engine running and steering wheel turned Pulse generation
    E79-12 (LG) - E77-7 (PGND) Y - W-B Steering actuator lock ground Engine running Pulse generation
    E79-14 (S2) - E77-7 (PGND) L - W-B Steering actuator motor rotation angle sensor signal Engine switch on (IG) Sine wave
    E79-15 (RG) - E77-7 (PGND) G - W-B Steering actuator resolver common ground Always Below 1 Ω
    E79-16 (SG2+) - E77-7 (PGND) Shielded - W-B Shielded ground wire for steering actuator motor rotation angle sensor signal wire and control signal wire Engine switch on (IG) Pulse generation
    E79-19 (SS1+) - E77-7 (PGND) L - W-B Steering angle sensor signal Engine running and steering wheel turned 3 to 4 V