SL/R129: already change my crank position sensor on my 1992 sl500
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Joined: Jan 2016
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sl500
already change my crank position sensor on my 1992 sl500
need help how to diagnose the check engine light? when the engine heats up it suddenly the engine dies when you crank it it will not start again, but if you pull and put back the crank angle socket it will start again. It has a 9 pole diagnostic how will i know the check engine problem? thanks!
Super Member
Joined: Jul 2010
Posts: 598
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From: Eastern Kansas
94 SL 600, 98 993, 89 XJS Conv., 85 Daimlier Princess 16 Hybrid Lincoln 16 Chevy crewcab
the early R 129 diagnostic port is on the right side of the fire wall ( US vehicle set up )
A blink light system is how you gain insight. Each contact point has one lead with the tester, the second lead touches the ground point in the 38 pin junction point.
the early models don't have the OBS II standard connection. early years also have the "mercedes" OBS I and some years have both analogy and digital aspects of the "on board diagnostic" port.
Your solution of disconnecting the crank sensor is providing a re-set of the system.
I personally turn the reading of the blinks to an "old school" benz mechanic and the get to repair or replacement of the offended system.
From other members of the forum who own the Japan version model may have a real insight for you. Also BenzWorld may have the "blink" code list if you are DIY.
Good luck
A blink light system is how you gain insight. Each contact point has one lead with the tester, the second lead touches the ground point in the 38 pin junction point.
the early models don't have the OBS II standard connection. early years also have the "mercedes" OBS I and some years have both analogy and digital aspects of the "on board diagnostic" port.
Your solution of disconnecting the crank sensor is providing a re-set of the system.
I personally turn the reading of the blinks to an "old school" benz mechanic and the get to repair or replacement of the offended system.
From other members of the forum who own the Japan version model may have a real insight for you. Also BenzWorld may have the "blink" code list if you are DIY.
Good luck
