AIR SUSPENSION SYSTEM TERMINALS OF ECU

Tech Tips

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


  1. CHECK SUSPENSION CONTROL ECU

    A001ALEE03
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    L88-1 (B) - L88-4 (GND) W - W-B IG power supply Engine switch on (IG) 10 to 14 V
    L88-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    L88-5 (SLEX) - L88-4 (GND) L - W-B Exhaust valve Engine switch on (IG) Below 1 V
    Engine idling, height control switch from "HEIGHT HIGH" to normal 8 V or more
    L88-6 (RC) - L88-4 (GND) BE - W-B Suspension control relay Engine switch on (IG) Below 1 V
    Engine idling, height control switch from normal to "HEIGHT HIGH" during compressor operation 8 V or more
    L88-7 (CANH) - L88-8 (CANL) B - W CAN communication line Engine switch off 54 to 69 Ω
    L88-14 (TD) - L88-4 (GND) BE - W-B Height control is not operating Engine switch on (IG) 10 to 14 V
    L88-16 (SLFR) - L88-4 (GND) R - W-B No. 1 height control valve RH) Engine switch on (IG) Below 1 V
    Engine idling, height control switch from normal to "HEIGHT HIGH" or reverse 8 V or more
    L88-17 (SLFL) - L88-4 (GND) W - W-B No. 1 height control valve LH Engine switch on (IG) Below 1 V
    Engine idling, height control switch from normal to "HEIGHT HIGH" or reverse 8 V or more
    L88-18 (SBL1) - L88-4 (GND) R - W-B Front height control sensor LH power source Engine switch on (IG) 4.5 to 5.5 V
    L88-20 (SBR1) - L88-4 (GND) V - W-B Front height control sensor RH power source Engine switch on (IG) 4.5 to 5.5 V
    L88-21 (SGR1) - L88-4 (GND) R - W-B Front height control sensor RH ground Always Below 1 Ω
    L88-22 (SGL1) - L88-4 (GND) LG - W-B Front height control sensor LH ground Always Below 1 Ω
    L88-25 (SLRL) - L88-4 (GND) G - W-B No. 2 height control valve LH Engine switch on (IG) Below 1 V
    Engine idling, height control switch from normal to "HEIGHT HIGH" or reverse 8 V or more
    L88-26 (SLRR) - L88-4 (GND) Y - W-B No. 2 height control valve RH Engine switch on (IG) Below 1 V
    Engine idling, height control switch from normal to "HEIGHT HIGH" or reverse 8 V or more
    A39-3 (FBR+) - L88-4 (GND) R - W-B Absorber control actuator (for Front RH) Engine switch off 12.0 to 12.8 Ω
    A39-4 (FBR-) - L88-4 (GND) LG - W-B Absorber control actuator (for Front RH) Engine switch off 12.0 to 12.8 Ω
    A39-9 (FAR+) - L88-4 (GND) BE - W-B Absorber control actuator (for Front RH) Engine switch off 12.0 to 12.8 Ω
    A39-11 (FAR-) - L88-4 (GND) R - W-B Absorber control actuator (for Front RH) Engine switch off 12.0 to 12.8 Ω
    A39-13 (FAL+) - L88-4 (GND) L - W-B Absorber control actuator (for Front LH) Engine switch off 12.0 to 12.8 Ω
    A39-14 (FAL-) - L88-4 (GND) R - W-B Absorber control actuator (for Front LH) Engine switch off 12.0 to 12.8 Ω
    A39-15 (FBL+) - L88-4 (GND) W - W-B Absorber control actuator (for Front LH) Engine switch off 12.0 to 12.8 Ω
    A39-16 (FBL-) - L88-4 (GND) BE - W-B Absorber control actuator (for Front LH) Engine switch off 12.0 to 12.8 Ω
    A39-17 (RM+) - L88-4 (GND) Y - W-B Motor lock (+) Engine idling, height control switch from normal to "HEIGHT HIGH" during compressor operation Below 1 V
    Engine idling, height control compressor not operation 8 V OR higher
    A39-18 (RM-) - L88-4 (GND) B - W-B Motor lock (-) Always Below 1 Ω
    A39-19 (SHR2) - L88-4 (GND) LG - W-B Height control sensor (for AFS ECU) Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V
    A39-20 (SHFR) - L88-4 (GND) B - W-B Front height control sensor RH Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V
    A39-21 (SHF2) - L88-4 (GND) L - W-B Height control sensor (for AFS ECU) Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V
    A39-22 (SHFL) - L88-4 (GND) L - W-B Front height control sensor LH Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V
    A39-23 (SBL3) - L88-4 (GND) BR - W-B Height control sensor power source (for AFS ECU) Engine switch on (IG) 4.5 to 5.5 V
    A39-24 (SGL3) - L88-4 (GND) GR - W-B Height control sensor ground (for AFS ECU) Always Below 1 Ω
    R1-3 (RAR-) - L88-4 (GND) G - W-B Absorber control actuator (for Rear RH) Engine switch off 12.0 to 12.8 Ω
    R1-4 (RBR+) - L88-4 (GND) LG - W-B Absorber control actuator (for Rear RH) Engine switch off 12.0 to 12.8 Ω
    R1-5 (RBR-) - L88-4 (GND) P - W-B Absorber control actuator (for Rear RH) Engine switch off 12.0 to 12.8 Ω
    R1-6 (RAL+) - L88-4 (GND) L - W-B Absorber control actuator (for Rear LH) Engine switch off 12.0 to 12.8 Ω
    R1-7 (RAL-) - L88-4 (GND) G - W-B Absorber control actuator (for Rear LH) Engine switch off 12.0 to 12.8 Ω
    R1-8 (RBL+) - L88-4 (GND) BE - W-B Absorber control actuator (for Rear LH) Engine switch off 12.0 to 12.8 Ω
    R1-11 (SGFL) - L88-4 (GND) L - W-B Acceleration sensor (for Front) Engine switch on (IG), keep the vehicle still without any vertical movement for 1 second Approx. 2.5 V
    R1-12 (SGR3) - L88-4 (GND) LG - W-B Acceleration sensor ground (for Rear) Always Below 1 Ω
    R1-13 (RAR+) - L88-4 (GND) Y - W-B Absorber control actuator (for Rear RH) Engine switch off 12.0 to 12.8 Ω
    R1-15 (SBR3) - L88-4 (GND) BE - W-B Acceleration sensor power source (for Rear) Engine switch on (IG) 4.5 to 5.5 V
    R1-16 (SBL) - L88-4 (GND) R - W-B Acceleration sensor power source (for Front) Engine switch on (IG) 4.5 to 5.5 V
    R1-20 (RBL-) - L88-4 (GND) BR - W-B Absorber control actuator (for Rear LH) Engine switch off 12.0 to 12.8 Ω
    R1-21 (CA2L) - R1-22 (CA2H) W - B CAN communication line Engine switch off 54 to 69 Ω
    R1-23 (SGL2) - L88-4 (GND) GR - W-B Rear height control sensor LH ground Always Below 1 Ω
    R1-24 (SBL2) - L88-4 (GND) BR - W-B Rear height control sensor LH power source Engine switch on (IG) 4.5 to 5.5 V
    R1-25 (SGR2) - L88-4 (GND) V - W-B Rear height control sensor RH ground Always Below 1 Ω
    R1-26 (SBR2) - L88-4 (GND) B - W-B Rear height control sensor RH power source Engine switch on (IG) 4.5 to 5.5 V
    R1-27 (SGRR) - L88-4 (GND) BR - W-B Acceleration sensor (for Rear) Engine switch on (IG), keep the vehicle still without any vertical movement for 1 second Approx. 2.5 V
    R1-28 (SHRR) - L88-4 (GND) P - W-B Rear height control sensor RH Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V
    R1-29 (SGL) - L88-4 (GND) V - W-B Acceleration sensor ground (for Front) Always Below 1 Ω
    R1-30 (SHRL) - L88-4 (GND) LG - W-B Rear height control sensor LH Engine switch on (IG) 0.5 to 4.5 V
    Engine idling, completion of vehicle height control from "HEIGHT HIGH" to normal Approx. 2.5 V