DTC B2602: Vehicle Speed Control

DTC detecting condition: 

When vehicle speed error data was continuously received from VDC for 800 ms or more.

Trouble symptom: 

Seat operation is possible with manual operation, but not with memory function.

(Memory registration is possible.)

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Power Seat Memory] using the Subaru Select Monitor. Ref. to Power Seat Memory System (Diagnostics)>Diagnostic Trouble Code (DTC) .

      Is DTC B2602 displayed? (Current malfunction)

      Yes  : Go to  2 .

      No  : Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and perform the diagnosis again.

      NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. CHECK DTC  .

   Perform the inspection for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

   Is the check result OK?

   Yes  : Go to  3 .

   No  : Perform the inspection according to the diagnosis for LAN system.

3. CHECK VDC MODULE  .
   1. Perform the diagnosis for VDC module. Ref. to BRAKE CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
   2. After the diagnosis, read the DTC of [Power Seat Memory] using the Subaru Select Monitor. Ref. to Power Seat Memory System (Diagnostics)>Diagnostic Trouble Code (DTC) .

      Is DTC B2602 displayed? (Current malfunction)

      Yes  : Replace the VDC module. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

      No  : Malfunction occurred in the VDC module.