Delphi

NO COMMUNICATION WITH EBCM (DELPHI)

Steps 1 - 11:

Steps 12 - 14:

Circuit Description
Serial Data is transmitted/received by the EBCM through terminal 21. The EBCM is supplied with constant battery feed voltage through terminals 1 and 2, and switched ignition voltage through terminal 13. The EBCM ground is provided through terminal 14 and 15.

Diagnostic Aids
Typical causes of no communication with the EBCM:
^ Poor terminal contact at the EBCM
^ Loss of EBCM ground to terminal 14 and 15
^ Loss of battery voltage at EBCM terminals 1 and/or 2
^ Loss of ignition voltage at EBCM 13
^ Open/grounded data line
^ Data line with high resistance