AIR SUSPENSION SYSTEM, Diagnostic DTC:C175114

DTC Code DTC Name
C175114 Compressor Relay Coil Circuit Circuit Short to Ground or Open

DESCRIPTION

The suspension control relay (AIRSUS) switches according to signals from the suspension control ECU and operates compressor motor (NO. 1 height control compressor).

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C175114 Compressor Relay Coil Circuit Circuit Short to Ground or Open With the suspension control relay (AIRSUS) not activated, an open signal of the suspension control relay (AIRSUS) is detected for 1 second or more.

  • Wire harness or connector

  • Suspension control relay (AIRSUS)

  • Suspension control ECU

 Comes on Yes

WIRING DIAGRAM

B004SFEE02
*a to NO. 1 Height Control Compressor
*b Suspension Control Relay (AIRSUS)
*c from Auxiliary Battery
*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 SUSPENSION CONTROL RELAY (AIRSUS)


    1. Inspect the suspension control relay (AIRSUS).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SUSPENSION CONTROL RELAY

    OK

  2. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL RELAY (AIRSUS) - SUSPENSION CONTROL ECU)


    1. Turn the power switch off.

    2. Disconnect the L104 suspension control ECU connector.

    3. Remove the suspension control relay (AIRSUS) from the luggage room No. 2 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L104-10 (RC) - Relay block suspension control relay terminal 1 Always Below 1 Ω
      L104-10 (RC) or Relay block suspension control relay terminal 1 - Body ground and other terminals Always 10 kΩ or higher
      Relay block suspension control relay terminal 2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR