C7.1 Engines For Caterpillar Built Machines Caterpillar

Probable Causes

• Diagnostic codes

• Engine speed dial

• Backup throttle switches

Recommended Repairs

Diagnostic Codes

Use one of the following methods to check for active diagnostic codes:

• The electronic service tool

• The display on the control panel

Electronic Service Tool

1. Connect the electronic service tool to the diagnostic connector.

2. Check for active diagnostic codes on the electronic service tool.

3. Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".

Display on the Control Panel

Note: The following procedure is only applicable if the application is equipped with a display on the control panel.

1. Check the display on the control panel for active diagnostic codes.

2. Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".

Engine Speed Dial

If the engine speed does not change when using the engine speed dial, refer to the Troubleshooting Guide for the machine application.

Backup Throttle Switches

If the engine speed does not change when using the backup throttle switches, refer to Troubleshooting, "Throttle Switch Circuit - Test".