Ignition Discharge Module (IDM)

Connect TECH 2 scan tool to Data Link Connector (DLC). Remove ignition discharge module. Inspect IDM seals, springs and electrical connector for wear or damage. See Fig 1 . Repair or replace as necessary. Reconnect electrical connector. Install test spark plugs into IDM and connect SST 86 10 867 spark plug grounding lead (or equivalent). See Fig 2 . Turn ignition on. Keep IDM in upright position and use scan tool to select ACTIVATE: IGNITION COIL CYL 1-6. Test several cylinders to compare to each other. If any ignition coil does not spark, replace IDM.

Fig 1: Identifying Ignition Discharge Module Components (2.0L & 2.3L Shown; 3.0L Is Similar)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Testing Ignition Discharge Module (2.0L & 2.3L Shown; 3.0L Is Similar)

Courtesy of SAAB-SCANIA OF AMERICA, INC.