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AIR SUSPENSION SYSTEM, Diagnostic DTC:C175112

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DTC Code DTC Name
C175112 Compressor Relay Coil Circuit Circuit Short to Battery
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DESCRIPTION

The suspension control relay (AIRSUS) switches according to signals from the suspension control ECU and operates compressor motor.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C175112 Compressor Relay Coil Circuit Circuit Short to Battery With the suspension control relay (AIRSUS) activated, a short signal of the suspension control relay (AIRSUS) is detected for 1 second or more.

  • Suspension control relay (AIRSUS)

  • Suspension control ECU

 Comes on Yes
Table 1. *a to NO. 1 Height Control Compressor *b Suspension Control Relay (AIRSUS) *c from Auxiliary Battery *d Suspension Control ECU
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WIRING DIAGRAM

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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.

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PROCEDURE


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    INSPECT SUSPENSION CONTROL RELAY (AIRSUS)


    1. Inspect the suspension control relay (AIRSUS).

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      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPLACE SUSPENSION CONTROL RELAY (AIRSUS)

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    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
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE SUSPENSION CONTROL ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR