Null string provided for DM56 Engine Family did not fail.

[ericthomasswenson]

-84 doesn’t fail for no Engine Family value in DM56 reply. It may have been detected, but should say something like:

FAIL: 6.1.6.2.x Engine Family Name missing from DM56.

Instead of Error: (which looks like a system failure)

2024E-MY comes from the regulation in 13 CCR 1971.1 (h). What follows matches the manufacturer’s emissions cert. application according to EPA’s rule (cited in an artifact footnote).

Start Test 1.6 - DM56: Model year and certification engine family 11:06:13.3182 Global DM56 Request 11:06:13.3206 18EAFFF9 [3] C7 FC 00 (TX) 11:06:13.3763 1CFCC700 [9] 32 30 32 34 45 2D 4D 59 00 Model Year and Certification Engine Family from Engine #1 (0): Model Year: 2024E-MY Family Name:

ERROR: Error: begin 0, end 1, length 0 /* -84 tool string

End Test 1.6 - DM56: Model year and certification engine family

This engine should send: RNVXH07750SB

[karysg]

Fail should occur as part of step 6.1.6.2.e

e. Fail if engine family has <> 12 characters before first asterisk character (ASCII 2Ah) or “null” character (ASCII 00h).

[ericthomasswenson]

Bob Halfman reports that failures are now observed for empty engine family strings. EG.

Start Test 1.6 - DM56: Model year and certification engine family 11:08:47.3887 Global DM56 Request 11:08:47.3906 18EAFFF9 [3] C7 FC 00 (TX) 11:08:47.4474 1CFCC700 [9] 32 30 32 34 45 2D 4D 59 00 Model Year and Certification Engine Family from Engine #1 (0):  Model Year: 2024E-MY Family Name:   FAIL: 6.1.6.2.e - Engine family has 0 characters, which is not 12.   End Test 1.6 - DM56: Model year and certification engine family