82139

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sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen

With the key on, engine off the duty cycle should read a steady 70% on a Federal and 85% on a California M103. Mine reads 00.00 or 99.99. Before warm up it should read about 50%. Mine still reads 00.00.

capn, i would recommend you check your eha readings cause the x11 (which i believe is getting the info from the lambda brain) is in open loop.
m

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)

I would look at the OVP. It sounds like you are dead in the road. You can verify it by looking at the EHA current.

The EHA current is what matters so it is the bottom line on control. I forget what car you are working on but there is no version I know of that goes 0% at KOEO (key on engine off). Late cars require the term 3 to be initiated in diagnostic mode via an impulse request at the right side diagnostic socket. These cars do read key KOEO properly though.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Larry, I bought the Sears 82400. It has a frequency meter and duty cycle as well.

Other features: (partial)

Capacitor tester
Frequency 4 hz to 4mhz
Transistor tester
temperature probe

all for 30 bux.

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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

Pretty tough to beat for $30.

Have a great day,