Information on CKP Learn Procedure After Engine Control Module (ECM) Reflash or Replacement (04-06-04-067)

Publication date: 2004-09-24
Reference number: 04-06-04-067

Information on CKP Learn Procedure After Engine Control Module (ECM) Reflash or Replacement

TECHNICAL SERVICE BULLETIN

Reference Number(s): 04-06-04-067, Date of Issue: September 24, 2004

Affected Model(s):

2004-2005 Chevrolet Aveo, Epica, Optra, Vivant; 2005 Pontiac Wave (Canada Only); with Delphi Engine Control Module (ECM)

SERVICE INFORMATION

IMPORTANT: This bulletin does NOT apply to vehicles with a Siemens controller. The software within the Siemens controller features a built-in continuous learn procedure. The Delphi controller software does not have this feature so the learn procedure must be performed.

This bulletin is being issued to remind technicians that when an engine control module (ECM) is reflashed or replaced, and the driveplate of the flywheel has been replaced, the crankshaft position (CKP) system variation learn procedure must be performed (refer to CKP System Variation Learn Procedure in SI). If this procedure is not performed, illumination of the malfunction indicator lamp (MIL) could result.

The following Delphi controllers need to have the CKP system variation learn procedure performed.

Fig 1: ITMS 6F Delphi