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11. FUEL PRESSURE SOLENOID Turn the ignition off. Replace the Fuel Pressure Solenoid in accordance with the Service Information. Turn the ignition on. With the scan tool, erase the ECM DTCs. Attempt to start and test drive the vehicle. With the scan tool, read the ECM DTCs. Does the ECM display this DTC? Yes >> Replace the Fuel Pump in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Test Complete. 12. CHECKING FUEL DELIVERY SYSTEM Refer to the appropriate Service Information and refer to Diagnosis and Testing Fuel Delivery System table. NOTE: The following is a list of problems that can cause fuel pressure to deviate from specification: Were there any problems with the Fuel Delivery System? Yes >> Repair as necessary in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Go To 13 13. FUEL PRESSURE SOLENOID Turn the ignition off. Replace the Fuel Pressure Solenoid in accordance with the Service Information. Turn the ignition on. With the scan tool, erase the ECM DTCs. Attempt to start and test drive the vehicle. With the scan tool, read the ECM DTCs. Does the ECM display this DTC? Yes >> Go To 14 No >> Test Complete. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 14. FUEL QUANTITY SOLENOID Turn the ignition off. Replace the Fuel Quantity Solenoid in accordance with the Service Information. Turn the ignition on. With the scan tool, erase the ECM DTCs. Attempt to start and test drive the vehicle. With the scan tool, read the ECM DTCs. Did this DTC set again? Yes >> Replace the Fuel Pump in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Test Complete. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 722 ENGINE DIESEL DIAG KJ |