Hello All,
This regards my 1989 300SE, m103 engine with KE-jetronic. For the last year plus I've been trying to find the appropriate balance between my air flow plate resting position, the 1 - 3 mm of free play, and having a running engine. In the process of this, my SRS light would occasionally come on. Up until last week, it was sporadic and usually timed with me unplugging something (OVP, EHA, or the like) with the battery still connected prior to checking the duty cycle percentage. And usually me disconnecting the battery for 5 minutes cleared it. And I was able to check duty cycle percentage without any warning lights.
However, last week I installed a rebuilt fuel distributor. I made sure to disconnect the battery for the install. And the three times I tried to verify my duty cycle percentage afterward, the SRS light came on. And the light was off upon immediate turning off and restarting the engine.
Just for clarity for those that don't know the protocol for checking duty cycle on the California model, there are extra steps. You:
-bring engine to operating temperature
-Put multimeter probes into 2 and 3 of x11(?)
-turn key to position 2. Multimeter reads 85%
-hold button on OBDi for 4 count, red led flashes once (which means clear. More flashes means a problem)
-hold OBDi button again for 4 count. Red led stays red. Multimeter now reads 70%
-you now have to use the key to start the engine without going to off. If you go to off, you must start all over. It's a pita.
So last week I went through the procedure, had the SRS light on. Turned off the engine. Start the engine. No SRS light. Turn off the engine. Go through the procedure. SRS light on. Turn off the engine. Start the engine. No SRS light. Turn off the engine. Go through the procedure. SRS light on. Turn off the engine. Restart the engine. No SRS light.
Any ideas as to why I'm getting this SRS light when trying to enter duty cycle reader mode? And any idea if it matters when reading duty cycle percentage?
Thanks,
Bill
This regards my 1989 300SE, m103 engine with KE-jetronic. For the last year plus I've been trying to find the appropriate balance between my air flow plate resting position, the 1 - 3 mm of free play, and having a running engine. In the process of this, my SRS light would occasionally come on. Up until last week, it was sporadic and usually timed with me unplugging something (OVP, EHA, or the like) with the battery still connected prior to checking the duty cycle percentage. And usually me disconnecting the battery for 5 minutes cleared it. And I was able to check duty cycle percentage without any warning lights.
However, last week I installed a rebuilt fuel distributor. I made sure to disconnect the battery for the install. And the three times I tried to verify my duty cycle percentage afterward, the SRS light came on. And the light was off upon immediate turning off and restarting the engine.
Just for clarity for those that don't know the protocol for checking duty cycle on the California model, there are extra steps. You:
-bring engine to operating temperature
-Put multimeter probes into 2 and 3 of x11(?)
-turn key to position 2. Multimeter reads 85%
-hold button on OBDi for 4 count, red led flashes once (which means clear. More flashes means a problem)
-hold OBDi button again for 4 count. Red led stays red. Multimeter now reads 70%
-you now have to use the key to start the engine without going to off. If you go to off, you must start all over. It's a pita.
So last week I went through the procedure, had the SRS light on. Turned off the engine. Start the engine. No SRS light. Turn off the engine. Go through the procedure. SRS light on. Turn off the engine. Start the engine. No SRS light. Turn off the engine. Go through the procedure. SRS light on. Turn off the engine. Restart the engine. No SRS light.
Any ideas as to why I'm getting this SRS light when trying to enter duty cycle reader mode? And any idea if it matters when reading duty cycle percentage?
Thanks,
Bill
