Pulse “1b” is defined differently by various international standards and/or OEM EMC specs.
Daimler and Chrysler have quite a similar definition for Pulse 1b. Us = 30V.
Nissan requirement for Pulse 1b is quite different (-100V).
The old 2007 version of SAE J113-11 is also significantly different for multiple pulse parmeters.
Christian Rosu, 2022-01-24