Usage:
STEP 1. Check Locomotive Electrical System Shutdowns
Test Procedure:
Check the status of shutdowns in the locomotive electrical system between the throttle and notch inputs to the Locomotive control box (such as Isolate switch).
Expected Results:
All shutdowns between the throttle and Locomotive Control box notch inputs are in the "run" position. Notch input codes are enabled.
STEP 2. Check Notch Inputs
Test Procedure:
With the Locomotive Control box connected to the wiring harnesses, measure the DC voltage applied by the locomotive electrical system to the control box notch inputs (Connector J1, pins 16, 17, 18 and 19) with respect to the Interface (-) Battery Voltage (Connector J1, pin 15). Also measure the Interface (+) Battery Voltage (connector J1, pin 14) with respect to the Interface (-) Battery Voltage.
Expected Results:
With "high" inputs (code "1's") defined as being within 8 VDC of the Interface (+) Battery Voltage, and "low" inputs (code "0's") defined as being less than 2 VDC with respect to Interface (-) Battery Voltage, the notch code applied corresponds with the notch selected.
