Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> Cadillac >> 1989 >> Seville Base >> Repair and Diagnosis >> Engine Performance >> System >> DFI ECM Tests W/Codes >> Testing >> Fixed Spark Mode (Setting Ignition Timing)

Fixed Spark Mode (Setting Ignition Timing)

Download the full database via torrent (~1.1 TB)  |  Download Brad's custom LEMON patches
  1. Initial base timing is set by jumpering pins "A" and "B" together at ALDL connector, while NOT in diagnostic mode. The ALDL connector is located near brake pedal, just below dash. See Figure .
  2. Set timing to specification shown on EMISSION CONTROL LABEL. Jumpering pins "A" and "B" together will cause a "SET TIMING" message to appear on CCDIC. This indicates that ECM is in set ignition timing mode.
scientia non olet · About Brad's Car Manuals