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8. (K452) MDS SOLENOID NO.4 CONTROL CIRCUIT OPEN (PCM SIDE) CAUTION: Do not probe the PCM harness connectors. Probing the Is the resistance below 5.0 ohms? Yes >> Replace and program the Powertrain Control Module in accordance with the service information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to No >> Repair the open in the (K452) MDS Solenoid No.4 Control circuit between the C100 harness connector and the PCM Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9. MDS SOLENOID 4 Turn the ignition off. Remove the Intake Manifold per Service Information. Reconnect the PCM harness connector. Turn the ignition on. With the scan tool actuate the MDS Solenoid 4. Can you feel and hear the Solenoid Actuating? Yes >> Go To 10 No >> Remove the Solenoid (1) and check for any debris that may be blocking the oil passages (3) to the Solenoid. If the pas- 10. OIL PASSAGES RESTRICTED Turn the ignition off. Remove both Solenoids on Bank 1 of the engine block. Remove the Bank 1 Cylinder Head per Service Information. Remove the Lifters from the left engine bank. Inspect the oil passages to the Solenoids and from the Solenoids to the lifters. Are the passages blocked? Yes >> Clean the oil passages as necessary. If the entire engine is restricted disassembly of the entire engine block may be necessary. No >> Replace both sets of lifters if no other possible causes remain. 9 - 928 ENGINE ELECTRICAL DIAGNOSTICS LX |