Series 60 Faulty Electronic Control Module

To determine if a faulty electronic control module (ECM) is causing the cylinder to misfire, perform the following: ‪

Note: Carefully disengage the lock tab on the power harness and injector harness connectors when removing.

1. Remove the thru-bolts holding the ECM to the engine;
2. Remove the ECM from the engine and tag the ECM for core return.
3. Obtain a new reprogrammed ECM for the engine you are troubleshooting.
4. Inspect the ECM isolators for any damage. Replace if necessary,
5. Install the ECM to the engine using thru-bolts;
6. Torque the ECM thru-bolts to 23 – 27 N · m (17 – 20 lb · ft).
7. Torque the ECM connector hold-down screws to 24 – 30 N · m (21 – 26 lb · in.).

Faulty ECM Repair

No repair authorized for ECM. ‪

Verification of Repair for Faulty ECM

Perform the following steps to determine if the new ECM resolved the misfiring cylinder condition: ‪

1. Start the engine.
2. Run the engine speed up to the occurrence of the misfiring.
3. Listen for misfiring cylinder.
   1. If the engine is not misfiring, shut down the engine. No further troubleshooting is required.
   2. If the engine is misfiring, shut down the engine and check for worn or damaged valves and cylinder kits;