Service Procedure

SERVICE PROCEDURE


1. Remove the Body Control Module (BCM) and the BCM PROM in accordance with the Service Procedure in Section 8C of the 1986 Cadillac Service Information Manual - Eldorado and Seville.


2. Install new service EPROM - Part # 16066007 into the EPROM socket of the BCM (Refer to Section 8C; 1986 Cadillac Service Information Manual - Eldorado and Seville.)


3. Install BCM onto vehicle in accordance with the above stated procedure.


4. Turn ignition to the "Run" position. (DO NOT START ENGINE).


5. Enter diagnostics, clear BCM codes and exit diagnostics. Each of seven possible transmission shift selections (PRND321) should now be displayed in the upper right portion of the Instrument Panel Cluster ([PC).

Figure 1:

6. Move the transmission shift lever to each of the seven possible selections on the shift console. Each corresponding position on the IPC display should be surrounded by a lighted "box." See Figure 1.


7. Move the gear selector to drive. Verify that only the "D" indicator is surrounded by a lighted "box." See Figure 1.

8. Re-enter diagnostics and check for stored BCM codes.


9. If all gear positions are surrounded by a lighted box during Step 6 or 7, or if B127 is stored in diagnostics when performing Step 8, perform the diagnosis described in connection with Code B127, PRNDL Circuit, Section 8D2; 1986 Cadillac Service Information Manual, Eldorado and Seville.