SWITCH AS-CONTROL 4886548 - Caterpillar

Probable Causes
Diagnostic codes
ECM parameters
Electrical connectors
Air intake and exhaust system
Valve lash
Turbocharger
Fuel supply
Low compression (cylinder pressure)
Individual malfunctioning cylinder
Electronic unit injectorsRecommended Actions
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Diagnostic Codes
Check for active diagnostic codes on the electronic service tool. Troubleshoot any active codes before continuing with this procedure.ECM Parameters
Ensure that the fault is not a programmed parameter.
Use the electronic service tool to ensure that the correct mode was selected.
Use the electronic service tool to verify that the correct engine rating has been provided.
Use the electronic service tool to verify the maximum engine speed limit.
Use the electronic service tool to reset the parameters to the OEM specifications.
Ensure that the repairs have eliminated the fault.
If the repairs have not eliminated the fault proceed to "Electrical Connectors". Electrical Connectors
Turn the keyswitch to the ON position.
Use the electronic service tool to verify that the intake manifold pressure is 0 kPa (0 psi). Check the 5 Volt sensor supply for the intake manifold pressure. Refer to Troubleshooting, "5 Volt Sensor Supply Circuit - Test".
Use the electronic service tool to verify the throttle position status.
Run the engine until the speed is equal to the maximum no-load speed.
If the maximum no-load speed of the engine is erratic refer to Troubleshooting, "Speed Demand Circuit (Analog) - Test" or Troubleshooting, "Speed Demand Circuit (Digital) - Test".
If