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 greater than 22 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:
- A short circuit to the +Battery side
- A short circuit to ground
Test Step 1. Perform the following diagnostic procedure: "Desired Speed Input (4 - 20 mA)"
Results:
- OK - STOP