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AIR SUSPENSION SYSTEM TERMINALS OF ECU

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  1. CHECK SUSPENSION CONTROL ECU


    1. B004RQ7E01

      Measure the voltage and resistance according to the value(s) in the table below.

      Note:

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

      Table 1. Connector L104:
      Terminal NO. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L104-1 (SLRR) - L105-3 (GND) P - W-B NO. 2 height control valve sub-assembly RH During NO. 2 height control valve sub-assembly RH operation 8 V or higher
      NO. 2 height control valve sub-assembly RH not operating Below 1 V
      L104-2 (SLRL) - L105-3 (GND) B - W-B NO. 2 height control valve sub-assembly LH During NO. 2 height control valve sub-assembly LH operation 8 V or higher
      NO. 2 height control valve sub-assembly LH not operating Below 1 V
      L104-3 (SLEX) - L105-3 (GND) L - W-B Exhaust valve (NO. 1 height control compressor) During exhaust valve (NO. 1 height control compressor) operation 8 V or higher
      Exhaust valve (NO. 1 height control compressor) not operating Below 1 V
      L104-7 (SPS2) - L105-3 (GND) R - W-B Height control way Power switch on (IG) 0.5 to 4.5 V
      L104-8 (SPG2) - L105-3 (GND) L - W-B Height control way ground Always Below 1 Ω
      L104-9 (SPB2) - L105-3 (GND) P - W-B Height control way power source Power switch on (IG) 4.75 to 5.25 V
      L104-10 (RC) - L105-3 (GND) B - W-B Suspension control relay (AIRSUS) During NO. 1 height control compressor operation 11 to 14 V
      NO. 1 height control compressor not operating Below 1 V
      L104-11 (SLC1) - L105-3 (GND) SB - W-B NO. 3 height control valve (NO. 1 height control compressor) During NO. 3 height control valve (NO. 1 height control compressor) operation Below 1 V
      NO. 3 height control valve (NO. 1 height control compressor) not operating 8 V or higher
      L104-12 (SLC2) - L105-3 (GND) G - W-B NO. 3 height control valve (NO. 1 height control compressor) During NO. 3 height control valve (NO. 1 height control compressor) operation Below 1 V
      NO. 3 height control valve (NO. 1 height control compressor) not operating 8 V or higher
      L104-13 (SLC4) - L105-3 (GND) LG - W-B NO. 3 height control valve (NO. 1 height control compressor) During NO. 3 height control valve (NO. 1 height control compressor) operation Below 1 V
      NO. 3 height control valve (NO. 1 height control compressor) not operating 8 V or higher
      L104-14 (SLC3) - L105-3 (GND) V - W-B NO. 3 height control valve (NO. 1 height control compressor) During NO. 3 height control valve (NO. 1 height control compressor) operation Below 1 V
      NO. 3 height control valve (NO. 1 height control compressor) not operating 8 V or higher
      L104-16 (RM-) - L105-3 (GND) LG - W-B Motor lock (-) Always Below 1 Ω
      L104-18 (RM+) - L105-3 (GND) Y - W-B Motor lock (+) During NO. 1 height control compressor operation Below 1 V
      NO. 1 height control compressor not operating 8 V or higher
      L104-19 (SPB) - L105-3 (GND) P - W-B Height control pressure sensor power source Power switch on (IG) 4.75 to 5.25 V
      L104-20 (SPG) - L105-3 (GND) L - W-B Height control pressure sensor ground Always Below 1 Ω
      L104-21 (PACC) - L105-3 (GND) R - W-B Height control pressure sensor Power switch on (IG) 0.5 to 4.5 V
      L104-22 (SHG3) - L105-3 (GND) V - W-B Rear height control sensor sub-assembly RH ground Always Below 1 Ω
      L104-23 (SHRR) - L105-3 (GND) P - W-B Rear height control sensor sub-assembly RH Power switch on (IG) 0.5 to 4.5 V
      L104-24 (SHB3) - L105-3 (GND) B - W-B Rear height control sensor sub-assembly RH power source Power switch on (IG) 4.75 to 5.25 V
      L104-25 (SHG4) - L105-3 (GND) GR - W-B Rear height control sensor sub-assembly LH ground Always Below 1 Ω
      L104-26 (SHRL) - L105-3 (GND) LG - W-B Rear height control sensor sub-assembly LH Power switch on (IG) 0.5 to 4.5 V
      L104-27 (SHB4) - L105-3 (GND) R - W-B Rear height control sensor sub-assembly LH power source Power switch on (IG) 4.75 to 5.25 V
      Table 2. Connector L105:
      Terminal NO. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L105-1 (BAT) - L105-3 (GND) B - W-B Power source Always 11 to 14 V
      L105-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L105-8 (IG) - L105-3 (GND) L - W-B IG power source Power switch on (IG) 11 to 14 V
      L105-9 (CANL) - L105-10 (CANH) W - G CAN communication line Power switch off 54 to 69 Ω
      L105-11 (SHB2) - L105-3 (GND) B - W-B Front height control sensor sub-assembly LH power source Power switch on (IG) 4.75 to 5.25 V
      L105-12 (SHG1) - L105-3 (GND) R - W-B Front height control sensor sub-assembly RH ground Always Below 1 Ω
      L105-13 (SHFR) - L105-3 (GND) P - W-B Front height control sensor sub-assembly RH Power switch on (IG) 0.5 to 4.5 V
      L105-14 (SLFR) - L105-3 (GND) Y - W-B NO. 1 height control valve sub-assembly RH During NO. 1 height control valve sub-assembly RH operation Below 1 V
      NO. 1 height control valve sub-assembly RH not operating 8 V or higher
      L105-16 (SLFL) - L105-3 (GND) G - W-B NO. 1 height control valve sub-assembly LH During NO. 1 height control valve sub-assembly LH operation Below 1 V
      NO. 1 height control valve sub-assembly RH not operating 8 V or higher
      L105-18 (UPSW) - L105-3 (GND) SB - W-B Height control switch (integration control and panel assembly) Power switch on (READY), height control switch (integration control and panel assembly) off 11 to 14 V
      Power switch on (READY), height control switch (integration control and panel assembly) held on Below 1.5 V
      L105-21 (CA2L) - L105-22 (CA2H) W - V CAN communication line Power switch off 54 to 69 Ω
      L105-23 (SHFL) - L105-3 (GND) L - W-B Front height control sensor sub-assembly LH Power switch on (IG) 0.5 to 4.5 V
      L105-24 (SHG2) - L105-3 (GND) GR - W-B Front height control sensor sub-assembly LH ground Always Below 1 Ω
      L105-25 (SHB1) - L105-3 (GND) V - W-B Front height control sensor sub-assembly RH power source Power switch on (IG) 4.75 to 5.25 V
      L105-26 (STG) - L105-3 (GND) Y - W-B Height control compressor thermistor assembly Always Below 1 Ω
      L105-28 (TOIL) - L105-3 (GND) LG - W-B Height control compressor thermistor assembly Power switch on (IG) 0.2 to 4.6 V