Service Manual

7. Troubleshooting 10-2019
162 A062J683 (Issue 1)Copyright © 2019 Cummins Inc.
6. Inspect the condition of the P1 pin on the control board. If it is damaged or
severely corroded, clean or repair if possible, or replace the control board.
7. When reconnecting the harness plug to the connector, ensure that the pair are
fully seated next to each other.
8. Reconnect the P1 connector and test-run the generator set for fault occurrence.
Code 32 - Low Cranking Speed Sense
Logic: Quadrature frequency is less than 1 Hz (engine RPM is less than 180) for 30
continuous seconds after pressing start
Possible Causes:
• Starter, engine components
• Air intake system
• Exhaust system
• Alternator windings
• Wire connections
• Battery
• Battery connections
• Battery heater (if applicable)
• Oil viscosity
• Iced or corroded brushes or slip rings (open/shorted excitation circuit)
Diagnosis & Repair:
1. Check the last fault recorded.
• If this fault has not been repaired, troubleshoot that fault.
2. Measure battery voltage at the battery and the generator set.
• Recharge or replace the battery as necessary.
3. Verify the engine rotation manually.
• Repair engine damage as necessary.
4. Verify the alternator rotation manually.
• Repair alternator damage as necessary.
5. Disconnect the generator set control J1 connector.
6. Verify the J1 pins are fully inserted, and inspect pin condition (pins 2 and 3 for
quad, and pins 1 and 13 for field) using one of the devices below:
• A mating pin connector
• A pin gauge of the same size as the mating control connector pin (0.045 in)
• Any suitable device that will not damage the inside contact wipers of the
pin socket
Insert, repair, or replace pins as necessary.