6000 V6-173 2.8L (1988)
Engine Control Module: Service and Repair
Electronic Control Module (ECM)
Mem-Cal Socket
Service of the Engine Control Module (ECM) should normally consist of replacing the ECM or an Engine Calibrator (Mem-Cal) change. If the
diagnosis calls for the ECM to be replaced, the MEM-CAL and ECM should be checked first to see if they are correct parts. If they are, remove
the Mem-Cal from the faulty ECM and install it in the new (service) ECM. The new ECM will not contain a Mem-Cal.
NOTICE: To prevent internal ECM damage, the ignition must be OFF when disconnecting or reconnecting power to ECM ( for example battery
cable, ECM pigtail, ECM fuse, Jumper cables, ect.)
Trouble Code 51 indicates the Mem-Cal is installed improperly or has malfunctioned. Check ECM installation for bent pins or pins not fully
seated in socket. If it is installed correctly and Code 51 still shows, replace Mem-Cal.
When replacing the production ECM with a service ECM, it is important to transfer the Broadcast code and production ECM number to the
service ECM label. This will allow positive identification of ECM parts throughout the life of the vehicle. DO NOT record on ECM cover.
REPLACEMENT
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Disconnect negative battery cable.
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Remove glove compartment.
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Disconnect connectors from ECM.
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Remove ECM mounting hardware.
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Remove ECM from passenger compartment.
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Remove ECM access cover.
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Remove Mem-Cal.
Replacement ECM is supplied without a Mem-Cal. Use care when removing it from the defective ECM, it will be reused in the new ECM. Using
two fingers, push both retaining clips back away from the Mem-Cal. At the same time grasp it at both ends and lift it up out of the socket. DO
NOT remove the cover of the Mem-Cal. Unapproved Mem-Cal removal may damage the Mem-Cal or socket.
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Inspect Mem-Cal For alignment notches and carefully set it aside.
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Remove new ECM from its packaging and check the service number to make sure it is the same as the defective ECM.
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Remove access cover.
