General Procedures - Starter Current Draw Test

Make sure the battery is fully charged.
For additional information, refer to: Specifications (414-01 Battery, Mounting and Cables - 6.7 L Diesel Engine).

Disable the fuel system. For gasoline engines, refer to:
For additional information, refer to: Fuel System Pressure Release (310-00 Fuel System - General Information - 6.7 L Diesel Engine).
. For diesel engines, refer to the Wiring Diagram for the Fuel Pump Integrated Connector Location.

Connect the 0-500 A sensor to the starter B+ cable and to the VCMM.

Connect the VCMM and use the oscilloscope function scaled to 100 A/div. Add the PIDs "Ambient Air Temperature" and "Engine Speed".

Crank the engine for no more than 6 seconds at a time.

Record the results, especially the ambient air temperature (AAT), starter current (current clamp) and crankshaft speed (PCM engine speed signal).

Compare the results with the specifications in the workshop manual.
For additional information, refer to: Specifications (303-06 Starting System - 6.7 L Diesel Engine).

If both signals are out of specification, replace the starter.
For additional information, refer to: Starter (303-06 Starting System - 6.7 L Diesel Engine).

Clear all CMT DTCs.