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14’ ml350 throwing p002500 adjustment of the exhaust camshaft bank 2 performed late. Replaced bank 1 and 2 cam sensors and solenoids. No difference. Turned motor by hand while CPA was out and checked reluctor down the hole and appeared centered. Continued turning motor over while solenoids were off and no cam adjuster slipping. No drivability problems. Need help
14’ ml350 throwing p002500 adjustment of the exhaust camshaft bank 2 performed late. Replaced bank 1 and 2 cam sensors and solenoids. No difference. Turned motor by hand while CPA was out and checked reluctor down the hole and appeared centered. Continued turning motor over while solenoids were off and no cam adjuster slipping. No drivability problems. Need help
That is a lot of fine testing on your end !
CPS are new
Solenoids are new
Reluctors have not shifted
VVT are locked
Is this now a STORED fault.... ?
Oil in the CPS/ECU harness??
Last edited by CaliBenzDriver; Jul 28, 2024 at 11:47 PM.
Is this now a STORED fault.... ?
Oil in the CPS/ECU harness??
CPS are new
extension pigtails installed on CPS and magnets
Cam adjusters are not slipping when hand turning motor
indexing on reluctors through cps holes at 53 degrees appear to be centered.
code is stored but lights up CEL
oil was in harness and slightly in ECU prior to pigtails. cleaned with electrical cleaner and even vaccumed the connectors to dry to draw fluid out.
i just purchased a 4 channel oscilliscope that is arriving 8/1 to verify can overlaps on both the exhaust cams prior to any disassembly.
worried about correction factor on left exhaust being 0 degrees
CPS are new
extension pigtails installed on CPS and magnets
Cam adjusters are not slipping when hand turning motor
indexing on reluctors through cps holes at 53 degrees appear to be centered.
code is stored but lights up CEL
oil was in harness and slightly in ECU prior to pigtails. cleaned with electrical cleaner and even vaccumed the connectors to dry to draw fluid out.
i just purchased a 4 channel oscilliscope that is arriving 8/1 to verify can overlaps on both the exhaust cams prior to any disassembly.
worried about correction factor on left exhaust being 0 degrees
This is when you need to decide what to go after...
We can assume the engine mechanicals are now in working order.
-- I think Xentry has a way of dealing (resetting/retraining) with cam correction factor perhaps your scanner does that as well.
-- I wouldn't directly blame the ECU which we know had oil soak.
-- TEST: concentrate on seeing if ECU is able to position the camshafts from idle to 2500Rpm. This will validate all 4x cam channels are functional
🤞
thanks. i will verify on friday as that is when i am back in town
hooked up the oscilloscope and both exhaust cams were exactly overlapped.
position of exhaust camshaft on left cylinder bank specified value (-30.00...-17.00) was -24.92 at 620 rpm and 4.7 at 2000 rpm.
right cylinder bank was similar
started out driving after clearing code and all seemed well until i stopped and cycled the key again. the CEL came on listing the P002500 code as stored and current. Had the scanner hooked up while driving. after a few more minutes driving scanner just listed the code as stored only. i would really like to get rid of the CEL light.
If the values are the similar on both exhaust cams, why is bank 2 only showing the stored code. Any advise?
installed new female pins on the connector last night as it came to me (exhaust cam solenoid bank 2 only) still dont know if the CEL will go out. will look into your recommendations. thanks for all your insight.
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