go to your owners manual and lookup the code 32. that should give you an idea of where to look.
This is an example;
LOW CRANKING SPEED FAULT—CODE NO. 32
(Cranking speed less than 180 rpm for more than 2 seconds)
Fuse F2 (starter solenoid) if blown (Page 6).
2. Clean and tighten the positive (
+) and negative (−) battery cable connections at the battery and at
the genset (Page 16).4. Replace the engine oil with oil of proper viscosity for the ambient temperature (Page 15). (High oil viscosity can slow cranking speed.)
3. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations.
Good luck. This is from the owners manual for my generator. not sure if it is the same as yours. If you go to the Cummins/Onan site (http://www.cumminsonan.com) then go to the RV section and lookup owners manuals. You will need your gen-set model #.