AIR SUSPENSION SYSTEM TERMINALS OF ECU


  1. CHECK SUSPENSION CONTROL ECU

    Tech Tips


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

    • Check the operation of a particular valve by listening for an operational sound or by using the Data List.

    A01NHG2E08
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A54-9 (SLEX) - Body ground Y - Body ground Exhaust valve Valve not operating Below 1 V
    Valve operating 8 V or more
    A54-11 (SLFL) - Body ground BE - Body ground Height control valve (for Front LH) Valve not operating Below 1 V
    Valve operating 8 V or more
    A54-12 (SLFR) - Body ground P - Body ground Height control valve (for Front RH) Valve not operating Below 1 V
    Valve operating 8 V or more
    A54-13 (SHB4) - Body ground V - Body ground Height control sensor power source (for Rear LH) Power switch on (IG) 4.5 to 5.5 V
    A54-14 (SHB3) - Body ground BR - Body ground Height control sensor power source (for Rear RH) Power switch on (IG) 4.5 to 5.5 V
    A54-15 (SHG3) - Body ground B - Body ground Height control sensor ground (for Rear RH) Always Below 1 Ω
    A54-16 (SHG4) - Body ground GR - Body ground Height control sensor ground (for Rear LH) Always Below 1 Ω
    A54-20 (SLLO) - Body ground G - Body ground Low pressure tank valve Valve not operating Below 1 V
    Valve operating 8 V or more
    A54-22 (RC) - Body ground SB - Body ground AIR SUS relay Compressor motor not operating Below 1 V
    Compressor motor operating 8 V or more
    A54-24 (SHRR) - Body ground LG - Body ground Height control sensor (for Rear RH) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A54-26 (SHRL) - Body ground R - Body ground Height control sensor (for Rear LH) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A54-27 (SHR2) - Body ground L - Body ground Height control sensor (for AFS ECU) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A55-11 (SHG2) - Body ground GR - Body ground Height control sensor ground (for Front LH) Always Below 1 Ω
    A55-12 (SHG1) - Body ground R - Body ground Height control sensor ground (for Front RH) Always Below 1 Ω
    A55-13 (SHB1) - Body ground LG - Body ground Height control sensor power source (for Front RH) Power switch on (IG) 4.5 to 5.5 V
    A55-14 (SHB2) - Body ground Y - Body ground Height control sensor power source (for Front LH) Power switch on (IG) 4.5 to 5.5 V
    A55-15 (SLRL) - Body ground B - Body ground Height control valve (for Rear LH) Valve not operating Below 1 V
    Valve operating 8 V or more
    A55-16 (SLRR) - Body ground V - Body ground Height control valve (for Rear RH) Valve not operating Below 1 V
    Valve operating 8 V or more
    A55-17 (RM-) - Body ground W - Body ground Motor lock (-) Always Below 1 Ω
    A55-19 (RM+) - Body ground L - Body ground Motor lock (+) Compressor motor not operating Below 1 V
    Compressor motor operating 8 V OR higher
    A55-20 (SHFR) - Body ground BE - Body ground Height control sensor (for Front RH) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A55-21 (SHG5) - Body ground P - Body ground Height control sensor ground (for AFS ECU) Always Below 1 Ω
    A55-22 (SHB5) - Body ground G - Body ground Height control sensor power source (for AFS ECU) Power switch on (IG) 4.5 to 5.5 V
    A55-23 (SHF2) - Body ground Y - Body ground Height control sensor (for AFS ECU) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A55-24 (SHFL) - Body ground BR - Body ground Height control sensor (for Front LH) Vehicle being raised Voltage increases within the range from 0.5 to 4.5 V in proportion to vehicle height
    Vehicle being lowered Voltage decreases within the range from 0.5 to 4.5 V in proportion to vehicle height
    A56-1 (IG) - Body ground Y - Body ground IG power supply Power switch on (IG) 11 to 14 V
    A56-3 (BAT) - Body ground Y - Body ground Auxiliary battery power supply Always 11 to 14 V
    A56-5 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    A56-7 (CANH) - A56-8 (CANL) B - W CAN communication line Power switch off 54 to 69 Ω
    A56-13 (TD) - Body ground R - Body ground Height control OFF switch Switch pressed and held 11 to 14 V
    Switch not pressed Below 1 V
    A56-14 (DNSW) - Body ground G - Body ground Height control switch (driver seat) down side Switch pressed and held 11 to 14 V
    Switch not pressed Below 1 V
    A56-15 (UPSW) - Body ground BE - Body ground Height control switch (driver seat) up side Switch pressed and held 11 to 14 V
    Switch not pressed Below 1 V
    A56-22 (LDNS) - Body ground B - Body ground Height control switch (luggage compartment) down side Switch pressed and held 11 to 14 V
    Switch not pressed Below 1 V
    A56-23 (LUPS) - Body ground V - Body ground Height control switch (luggage compartment) up side Switch pressed and held 11 to 14 V
    Switch not pressed Below 1 V