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AIR SUSPENSION SYSTEM, Diagnostic DTC:C177DA2

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DTC Code DTC Name
C177DA2 Supply Voltage Circuit +B Open
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DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C177DA2 Supply Voltage Circuit +B Open While power switch is ON (IG), BAT terminal voltage is 3 V or less and IG terminal voltage is 9 V or higher for 10 seconds

  • AIRSUS NO.2 fuse

  • LUG-IG1 NO.2 fuse

  • Wire harness or connector

  • Suspension control ECU

 Does not come on Yes
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Inspect the fuses for circuits related to this system before performing the followinginspection procedure.

  • Before performing troubleshooting, inspect the connectors of related circuits.

  • After replacing the suspension control ECU with a new one, perform vehicle height offset.

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PROCEDURE


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    CHECK TERMINAL VOLTAGE (IG TERMINAL, BAT TERMINAL)


    1. Turn the power switch off.

    2. Disconnect the L105 suspension control ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L105-8 (IG) - Body ground Power switch on (IG) 11 to 14 V
      L105-1 (BAT) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      L105-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

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    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    CHECK FOR DTCS


    1. Clear the DTCs.

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      1. Chassis > Air suspension > Clear DTCs


    2. Turn the power switch off.

    3. Check for DTCs.

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      1. Chassis > Air suspension > Trouble Codes


      Result
      Result Proceed to
      DTC is not output A
      DTC is output B