Service manual

9. Troubleshooting 9-2013
Possible Causes: Incorrect battery configuration, wire damage, faulty charger, control
Diagnosis & Repair:
1. Verify that the Last Fault is FC 29: Yes, continue diagnosis; No, troubleshoot actual last
fault.
2. Measure DC voltage at the battery, at the generator set, and at connector J1: reconnect
the battery or repair wiring as necessary.
3. Measure DC voltage with the battery charger on: reduce the boost charge rate or diagnose
the faulty charger as necessary.
4. Disconnect the generator set control J1 connector, verify that the J1 pins are fully inserted,
and inspect pin condition using the steps below:
• Use the test points of the tester tool #420-0603
• Use mating pin connector, a pin gauge of the same size (.045") as the mating control
connector pin, or any suitable device that will not damage the inside contact wipers of
the pin socket
• Insert, repair, or replace pins as necessary.
5. Reconnect the J1 connector and test run the generator set for fault occurrence.
9.23 Low Cranking Speed Sense - Fault Code 32
Logic: Quadrature frequency less than 1Hz (Engine RPM less than 180) for 3 continuous
seconds after pressing start
Possible Causes: Starter, engine components, air intake system, exhaust system, generator
windings, wire connections, battery, battery connections, oil viscosity
Diagnosis & Repair:
1. Verify that the Last Fault is FC 32: Yes, continue diagnosis; No, troubleshoot actual last
fault.
2. Measure battery voltage at the battery and the generator set: recharge or replace the
battery as necessary.
3. Verify engine rotation manually: repair engine damage as necessary.
4. Verify generator rotation manually: repair generator damage as necessary.
5. Disconnect the generator set control J1 connector, verify that the J1 pins are fully inserted,
and inspect pin condition using the steps below:
• Use the test points of the tester tool #420-0603
• Use a mating pin connector, a pin gauge of the same size (.045") as the mating
control connector pin, or any suitable device that will not damage the inside contact
wipers of the pin socket
• Insert, repair, or replace pins as necessary.
6. Reconnect the J1 connector and test run the generator set for fault occurrence: repair or
replace pins in the connector as necessary.
7. Measure DC voltage at the starter during a start attempt: repair wire connections, replace
the start solenoid and starter as necessary.
100 A030A239 (Issue 10)