Case IH 19515 – Engine Control Module (ECM): Short circuit to ground error for powerstage 1

The circuit controlled by powerstage 1 has shorted to the chassis ground. This can be caused by a chafed wiring harness touching the frame, an internal short within the actuator itself, or a failure of the internal driver inside the control module.

• Tier 4b
• 580N
• 580SN
• 580SN WT
• 590SN

1. 1

   Consult the specific machine's wiring diagram to determine exactly which actuator is assigned to Powerstage 1 (frequently the intake air heater, an EGR valve, or a DEF system heater)

2. 2

   Inspect the wiring harness connecting the ECM to the suspected actuator for chafing, bare wires, or pinching against the engine block or frame

3. 3

   Disconnect the actuator and use a multimeter to check the resistance of the wiring harness to ground (continuity to ground on the supply wire indicates a shorted harness)

4. 4

   Test the actuator itself for an internal short to ground

5. 5

   Inspect the ECM connector pins for water ingress, corrosion, or damage

1. 1

   Park the machine safely, lower any attachments to the ground, and turn off the engine.

   Park the machine safely, lower any attachments to the ground, and turn off the engine.

2. 2

   Disconnect the negative battery terminal to prevent electrical damage during repair.

   Disconnect the negative battery terminal to prevent electrical damage during repair.

3. 3

   Locate the specific actuator controlled by powerstage 1 and disconnect its wiring harness.

   Locate the specific actuator controlled by powerstage 1 and disconnect its wiring harness.

4. 4

   Inspect the connector for moisture or corrosion. Clean and apply dielectric grease if necessary.

   Inspect the connector for moisture or corrosion. Clean and apply dielectric grease if necessary.

5. 5

   Trace the wiring harness back to the ECM. If a chafed or bare wire is found touching the chassis, repair the wire by splicing and sealing it with heat-shrink tubing, or replace that section of the harness.

   Trace the wiring harness back to the ECM. If a chafed or bare wire is found touching the chassis, repair the wire by splicing and sealing it with heat-shrink tubing, or replace that section of the harness.

6. 6

   If the wiring is intact, replace the shorted actuator/solenoid.

   If the wiring is intact, replace the shorted actuator/solenoid.

7. 7

   Reconnect all components and the battery.

   Reconnect all components and the battery.

8. 8

   Connect a diagnostic tool (such as the Case EST) to clear the stored fault codes.

   Connect a diagnostic tool (such as the Case EST) to clear the stored fault codes.

9. 9

   Run the engine and verify that code 19515 does not return. If the code immediately returns despite a good harness and actuator, the ECM must be replaced.

   Run the engine and verify that code 19515 does not return. If the code immediately returns despite a good harness and actuator, the ECM must be replaced.