ENGINE CONTROL SYSTEM ECM BLOCK DIAGRAM 2 3 4 30 5 14 6 13 12 Insite 11 1 ECM 10 9 7 8 AWS0490L Figure 14 S0802195K Page 31 Electrical System Reference Number Description 1 ECM (Electronic Control Module) 2 Engine Check Warning Light 3 Engine Stop Warning Light 4 Engine Maintenance Light 5 Engine Derating Relay 6 TCU (Transmission Control Unit) 7 Data Link Harness Reference Number Description 8 Electronic Accelerator Pedal 9 Fuse Box 10 Engine Disgnostic Switch 11 Idle Speed Control Switch 12 Alternate Low Idle Switch 13 Alternate Torque Switch 14 Taco Meter