A. Inspect Master Cylinder Code

1. Inspect the front surface of the master cylinder for one of the following bottom codes as shown in figure 1 (the letter code is not important for this service):

^ ABS equipped JA vehicles (TWO master cylinder brake tubes) with a code of 3895;

^ NON-ABS equipped JA vehicles (FOUR master cylinder brake tubes) with a code of 3893; or

^ NON-ABS equipped PL vehicles (FOUR master cylinder brake tubes) with a code of 3815

If the master cylinder has one of the above four digit codes, replace the primary piston as instructed in Section B (verify that the vehicle has not already been repaired by using DIAL system function 70 or VIP). If the master cylinder has any other bottom code, no further action is required.