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Old 07-23-2002, 01:27 PM
Posts: n/a
No power to X-11 diagnostic socket (pin3/lambda)

I've been having poor MPG lately and went to check my CO reading and got a fixed 70% on my multimeter. This fixed reading was verified by a tech using a Bosch diagnostic computer, and he told me the problem is no power to the connector.

Looking at the schematic, pin 3 is supplied power via pin 23 of the CIS-E control unit.

Is this where I should start? If I do find battery voltage at this pin, what should I check next? The OVP was recently changed FWIW.


'91 300E
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