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P3450–CYLINDER 7 DEACTIVATION CONTROL PERFORMANCE (CONTINUED) For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. Theory of Operation When all criteria has been met, power is supplied to each MDS Solenoid when the engine is making a transition • When Monitored: • Set Condition: Possible Causes (K454) MDS SOLENOID NO.7 CONTROL SHORT TO VOLTAGE OIL PASSAGES RESTRICTED LIFTER MDS SOLENOID NO.1 PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC Ignition on, engine not running. With a scan tool, read DTCs. Is the DTC active at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. MDS SOLENOID NO.7 CONTROL CIRCUIT Turn the ignition off. Disconnect the MDS Solenoid No.7 harness connector. Ignition on, engine not running. Turn off all accessories. Using a 12-volt test light connected to ground, probe the (K454) MDS Solenoid No.7 Control circuit. Does the 12-volt test light illuminate? Yes >> Go To 3 No >> Go To 4 9 - 1088 ENGINE ELECTRICAL DIAGNOSTICS WK |