The Electronic Control Module (ECM) has been powered up for at least five seconds. The current to the ECM for the desired speed input is less than 2 mA for more than five seconds.
System Response:
When the "Idle/Rated" switch is in the "Rated" position, the ECM assumes a default value for the desired engine speed.
The alarm output is activated. The code is logged.
Possible Performance Effect:
The default value for the desired engine speed is equal to the "Minimum Engine High Idle Speed" that is programmed on the "Service/Configuration" screen of the Caterpillar Electronic Technician (ET).
Troubleshooting:
The diagnostic code is generated by one of the following conditions:
- An open circuit or a short circuit to ground
- An open circuit or a short circuit to the +Battery
Test Step 1. Perform the following diagnostic procedure: "Desired Speed Input (4 - 20 mA)"
Results:
- OK - STOP