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[jtp]

Help please
trying to locate PCM on 2000 Grand Cherokee, new shape.

[tim_aka_tim]

Just looked thru the official DC service manual for a 2000WJ and buggered if I can find where it is. One for Dr Mike methinks.

[Mike Pavelin]

Passanger side bulkhead under the hood with three big multi plugs.

[MK1]

Is PCM yanky for ECU, what does it stand for?

[isle of man]

Is PCM yanky for ECU, what does it stand for?

"pulse code modulation" and yes it's an "ecu"


peter henry

[Mike Pavelin]

Powertrain Control Module.

Because it controls not only the running of the engine, but stuff such as charging, A/C compressor, fans, cruise control etc.

[jtp]

Thanks for the help
Hoping that refurbing/cleaning connection will eradicate some running problems i encounter. Dealer recommended changing PCM but post on Jeeps Unlimited had some sound advice.
So far have spent £500 on o2 sensors and failed analisis by main dealers.
Still a great jeep!

[Anonymous]

Thanks for the help
Hoping that refurbing/cleaning connection will eradicate some running problems i encounter. Dealer recommended changing PCM but post on Jeeps Unlimited had some sound advice.
So far have spent £500 on o2 sensors and failed analisis by main dealers.
Still a great jeep!

Soz lad you might have been ripped off...
 Diagnostic check at Westbury plus another one and O2 sensors replacement £302.17

[jtp]

Actual 4 diagnostic checks and 2 no o2 sensors
Tried 3 main dealers so far.
Hoping DIY and help from forums will be better value.

[Mike Pavelin]

You're better off persisting at one place. If you keep taking it to different places you'll keep getting charged for the same work over and over again.