Test Requirement
- A CAN-Bus malfunction was recognized.
- The Engine Control Module (ECM) - J623- Transmission Control Module (TCM) -J217- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground connections between engine/transmission/chassis OK.
- Ignition switched Off.