ACTIVE HEIGHT CONTROL SUSPENSION, Diagnostic DTC:C1795

DTC Code DTC Name
C1795 Access Mode Switch Circuit (Test Mode DTC)

DESCRIPTION

According to the signal from the easy access mode switch (combination switch assembly), the suspension control ECU turns easy access mode control on/off.

DTC Code Detection Condition Trouble Area
C1795 The test mode procedure is performed.

  • Harness or connector

  • Easy access mode switch (Combination switch assembly)

  • Suspension control ECU

WIRING DIAGRAM

B0019TWE19

CAUTION / NOTICE / HINT

Note


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

  • If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed Click here.

PROCEDURE


  1. READ VALUE USING GTS (ACCESS MODE SWITCH)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and the GTS on.

    4. Enter the following menus: Chassis / AHC / Data List.

    5. According to the display on the GTS, read the Data List.

      AHC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Access Mode Switch

      Easy access mode switch /

      ON or OFF

      ON: Easy access mode switch pushed and held

      OFF: Easy access mode switch not pushed

      		 -
      OK
      On the GTS screen, item changes between ON and OFF according to switch operation.

    NG

    INSPECT COMBINATION SWITCH ASSEMBLY (EASY ACCESS MODE SWITCH) Click here

    OK

  2. TEST MODE INSPECTION


    1. Refer to the Test Mode Procedure and perform the signal check. Check that test mode DTC C1795 is cleared Click here.

      Result
      Result Proceed to
      DTC C1795 is not cleared A
      DTC C1795 is cleared B

    A

    REPLACE SUSPENSION CONTROL ECU Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. INSPECT COMBINATION SWITCH ASSEMBLY (EASY ACCESS MODE SWITCH)


    1. Remove the easy access mode switch (combination switch assembly) Click here.

    2. Inspect the easy access mode switch (combination switch assembly) Click here.


    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - SWITCH)


    1. Disconnect the K30 ECU connector.

    2. Disconnect the E125 combination switch assem connector.

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

      B001AULE02
      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      K30-10 (LMSW) - E125-6 (ECU1) Always Below 1 Ω
      K30-10 (LMSW) - Body ground Always 10 kΩ or higher
      E125-16 (GND) - Body ground Always Below 1 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      K30-10 (LMSW) - E125-3 (ECU1) Always Below 1 Ω
      K30-10 (LMSW) - Body ground Always 10 kΩ or higher
      E125-13 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR