AIR SUSPENSION SYSTEM, Diagnostic DTC:C171A12

DTC Code DTC Name
C171A12 Pressure Sensor No.1 Circuit Circuit Short to Battery

DESCRIPTION

The height control pressure sensor outputs the pneumatic with tube tank assembly pressure to the suspension control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
C171A12 Pressure Sensor No.1 Circuit Circuit Short to Battery The output voltage of the height control pressure sensor is 4.7 V or higher continuously for 1 second

  • Wire harness or connector

  • Height control pressure sensor

  • Suspension control ECU

 Comes on Yes

WIRING DIAGRAM

B004YL7E03
*a SPB
*b SPG
*c Height Control Pressure Sensor
*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 calibration.

    Click here

PROCEDURE


  1. INSPECT HEIGHT CONTROL PRESSURE SENSOR


    1. Inspect the height control pressure sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEIGHT CONTROL PRESSURE SENSOR Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL PRESSURE SENSOR - SUSPENSION CONTROL ECU)


    1. Turn the power switch off.

    2. Disconnect the L104 suspension control ECU connector.

    3. Disconnect the L3 height control pressure sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L104-20 (SPG) - L3-1 (SHG) Always Below 1 Ω
      L104-19 (SPB) or L3-3 (SHB) - L104-21 (PACC) or L3-2 (PACC) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR