FixVault

Inspection Mode 10

DTC Description & trouble part Note
U1678 LIN COMMUNICATION BUS 4 ERROR BODY CONTROL MODULE BIU detects DTC only when [Light LIN setting] is [Support].
U1781 LOST COMMUNICATION WITH LDM RH MODULE BIU detects DTC only when [Light LIN setting] is [Support].
U178A LOST COMMUNICATION WITH LDM LH MODULE BIU detects DTC only when [Light LIN setting] is [Support].

Diagnostic procedure:

  1. Using the Subaru Select Monitor, perform the clear memory of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
  2. Using the Subaru Select Monitor, read the DTC of [Body Control] to check that there is no DTC displayed. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
    NOTE: If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step  1.
  3. After the ignition switch is turned ON, wait for 5 seconds or more.
  4. Repeat the step  3 three or more times.
  5. Using the Subaru Select Monitor, read the DTC of [Body Control] to check that there is no DTC displayed. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
    NOTE: If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs.