AIR SUSPENSION SYSTEM, Diagnostic DTC:C177715

DTC Code DTC Name
C177715 Temperature Sensor Circuit Circuit Short to Battery or Open

DESCRIPTION

The height control compressor thermistor assembly outputs the temperature of the parts surrounding the NO. 1 height control compressor to the suspension control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C177715 Temperature Sensor Circuit Circuit Short to Battery or Open The output voltage of the height control compressor thermistor assembly is 4.8 V or higher continuously for 1 second.

  • Wire harness or connector

  • Height control compressor thermistor assembly

  • Suspension control ECU

 Comes on Yes

WIRING DIAGRAM

B0069NOE01
*a STG
*b TOIL
*c Height Control Compressor Thermistor Assembly
*d Suspension Control ECU

CAUTION / NOTICE / HINT

Note


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

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

    Click here

PROCEDURE


  1. INSPECT HEIGHT CONTROL COMPRESSOR THERMISTOR ASSEMBLY


    1. Inspect the height control compressor thermistor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEIGHT CONTROL COMPRESSOR THERMISTOR ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL COMPRESSOR THERMISTOR ASSEMBLY - SUSPENSION CONTROL ECU)


    1. Turn the engine switch off.

    2. Disconnect the L105 suspension control ECU connector.

    3. Disconnect the L180 height control compressor thermistor assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L105-26 (STG) - L180-1 (SBL) Always Below 1 Ω
      L105-28 (TOIL) - L180-2 (TOIL) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR