LS 400 & SC 400
NOTE:
DO NOT
warm the engine until specified. Some testing must be performed when engine is cold.
- Remove "V" bank cover from top of engine. Ensure coolant temperature is less than 127°F (53°C). Block wheels. Start engine. Shift transmission into Neutral. Connect Jumper Wire (09843-18020) between terminals TE1 and E1 of DLC No. 1.
- Run engine at 3500 RPM. Ensure coolant temperature is less than 127°F (53°C).
- While engine is running at 3500 RPM, disconnect jumper wire and observe engine RPM. If engine speed remains steady, go to next step. If engine speed does not remain steady, check for faulty EGR system components.
- Ensure engine coolant temperature is at least 131°F (55°C). Reconnect jumper wire between terminals TE1 and E1. While engine is running at 3500 RPM, disconnect jumper wire and observe engine RPM. If engine speed increases 100-300 RPM, EGR system is okay. If engine speed does not increase 100-300 RPM, check for faulty EGR system components.