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• When Monitored: • Set Condition: Possible Causes ASD RELAY OUTPUT CIRCUIT OPEN BP SOLENOID CONTROL CIRCUIT SHORTED TO GROUND BP SOLENOID CONTROL CIRCUIT OPEN BOOST PRESSURE SOLENOID ENGINE CONTROL MODULE Diagnostic Test 1. CHECK FOR ACTIVE DTC NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may With the scan tool, erase ECM DTCs. Test drive the vehicle. Monitor the scan tool for ECM DTCs. Did this DTC set again? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. CHECKING FOR OTHER DTCS NOTE: An open ASD power supply to the ECM will cause multiple DTC’s including this DTC to set. NOTE: Check the ECM for other DTC’s. If other DTC’s are set with this DTC refer to the symptom list and Are the ECM power and ground circuits are functioning properly?. Yes >> Go To 3 No >> Repair the ECM power and ground circuits. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). 9 - 694 ENGINE DIESEL DIAG KJ |