Section 23.7 Faulty Electronic Control Module

Section 23.7
Faulty Electronic Control Module

To determine if a faulty electronic control module is causing excessive white smoke, perform the following: ‪

1. Check for faulty electronic control module; refer to "16.6 Faulty Electronic Control Module" .
2. Check for faulty ECM repair; refer to "16.6.1 Faulty ECM Repair" .
3. Verify ECM repair; refer to "23.7.1 Test Engine with Repair to the Electronic Control Unit" .

Section 23.7.1
Test Engine with Repair to the Electronic Control Unit

Perform the following to determine if the ECM repair resolved excessive white smoke:‪

1. Start and run the engine.
2. Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
3. Visually inspect exhaust for excessive white smoke.
   1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut the engine down.
   2. If the engine exhaust emission is excessively white, shut the engine down. Call Detroit Diesel Technical Service Group.