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.