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9. ENGINE CONTROL MODULE (ECM) Turn the ignition off. Inspect the (F856) Accelerator Pedal Position Sensor No. 2 5 Volt Supply circuit between the Accelerator Pedal Inspect the (F858) Exhaust Gas Pressure Sensor 5 Volt Supply circuit between the Exhaust Gas Pressure Sensor Inspect the (K668) Inlet Air Pressure Sensor 5 Volt Supply circuit between the Inlet Air Pressure Sensor and the Inspect the (F851) Oil Pressure Sensor 5 Volt Supply circuit between the Oil Pressure Sensor and the ECM. Inspect the (K313) EGR Airflow Control Valve Supply circuit between the EGR Airflow Control Valve and the ECM. Inspect the (K354) Exhaust Differential Pressure Sensor 5 Volt Supply circuit between the Exhaust Differential Pres- Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes >> Repair as necessary. Perform the ECM VERIFICATION TEST. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Replace and program the Engine Control Module in accordance with the Service Information. Perform the ECM VERIFICATION TEST. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1568 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |