Checklist v5: step 32, temperature dial; step 14 notes the overnight soak

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

checklists/z27ag-captures.json

@@ -1,6 +1,6 @@
 {
   "id": "z27ag-captures",
-  "version": 4,
+  "version": 5,
   "title": "Z27AG decoding captures",
   "about": "docs/impl/plans/Z27AG-CAPTURES.md",
   "mark_format": "<step> <action>[ #<n>] start|end for a span, <step> <action>[ #<n>] for a point",
@@ -254,7 +254,7 @@
           "id": "14",
           "title": "Engine start",
           "do": "Cold start if possible: mark as the starter turns, then idle 60 s.",
-          "finds": "starting, coolant and oil warming, idle control",
+          "finds": "starting, coolant and oil warming, idle control; after standing overnight, every temperature sensor reads the outside temperature at the first frames, which scales 449 bytes 0, 1, 3 against OBD-II intake and coolant",
           "actions": [
             {
               "label": "engine start",
@@ -320,6 +320,25 @@
               "point": true
             }
           ]
+        },
+        {
+          "id": "32",
+          "title": "Temperature dial",
+          "do": "Engine warm (the heater needs it), blower on, A/C as it is. Sweep: from coldest to hottest a click or two at a time, a few seconds at each, then back; start at coldest, end back at coldest. Then hold hottest 5 min, and coldest 5 min, windows shut.",
+          "finds": "the dial setting on CAN (a byte stepping with each click); whether 449 byte 0 is the cabin temperature (it should drift up over the hot hold, down over the cold one)",
+          "actions": [
+            {
+              "label": "dial sweep"
+            },
+            {
+              "label": "hold hottest",
+              "hold_s": 300
+            },
+            {
+              "label": "hold coldest",
+              "hold_s": 300
+            }
+          ]
         }
       ]
     },