BOWL AS. 3661768 - Caterpillar

Disable the Air Start.
Operate the Black Start Push Button. Observe the status on the Cat ET.Expected Result:The status should change when the position is changed.Results:
OK - The button is operating normally. Proceed to test step 3.
Not OK - No change is observed on the Cat ET when the Black Start Push Button is operated. Proceed to test step 4.Test Step 3. Check the Switch Status on the Cat ET.
Install the Cat ET.
Observe the status for the Black Start Push Button.
Turn the ECS to the BLACK START ENABLE position. The engine should be OFF.
Turn the ECS to the STOP position.Expected Result:The status of the switch should change from "ON" to "OFF".Results:
OK - The status of the switch changes from "ON" to "OFF".Repair: If you are troubleshooting an intermittent fault, perform the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors". Stop.
Not OK - The status of the switch did not change from "ON" to "OFF". Proceed to test step 5.Test Step 4. Bypass the Wiring Harness.
Construct a jumper wire that can reach from the suspect Electronic Control Module (ECM) to the Black Start Push Button.
Connect one end of the jumper wire at P1-25.
Connect the other end to the switch at pin 7.
Disable the Air Start.
Turn the ECS to the BLACK START ENABLE position.
Change the switch position. Monitor the status on the Cat ET.Expected Result:The status should change.Results:
OK - The status on the Cat ET changed. There is a problem in the wiring harness.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Stop.
Not OK - The status on the Cat ET did not change. There is a problem in the harness and/or the Electronic Control Module (ECM). Proceed to test step 12.Test Step 5. Check the Lamp Status on the Cat ET
Construct a jumper wire that can reach from the ECM to the lamp