[UNVERIFIED] Astra diagram pass

Architecture/IO_MODULES/INJECTON.md

@@ -13,13 +13,7 @@ low-impedance injector requires a different architecture.
 
 ## Power path
 
-```text
-VBAT_PROT --> injector positive terminal --> injector coil --> VNL5050 DRAIN
-                                                                  |
-                                                           internal low-side MOSFET
-                                                                  |
-                                                                SOURCE --> INJ_PGND --> power-entry ground
-```
+![Injector power](../diagrams/injector-power.svg)
 
 - The injector's positive terminal connects to `VBAT_PROT`; its negative
   terminal connects to `DRAIN`.
@@ -37,12 +31,7 @@ VBAT_PROT --> injector positive terminal --> injector coil --> VNL5050 DRAIN
 `INPUT` is active high. It receives only the hardware-permitted injector
 command defined by the two-channel deadman interlock.
 
-```text
-SAFE_INJECTOR_SIG --> 1 kOhm Rprot --> INPUT
-                                         |-- 10 kOhm ---------> INJ_PGND
-                                         `-- low-capacitance
-                                             Zener clamp ------> INJ_PGND
-```
+![Injector command](../diagrams/injector-command.svg)
 
 ```text
 SAFE_INJECTOR_SIG = ENGINE_PERMIT AND MCU_INJECTOR_SIG
@@ -70,9 +59,7 @@ status inputs disagree.
 `STATUS` is an open-drain diagnostic output. It is read by the MCU through a
 1 kOhm protection resistor and a `+3V3_MAIN` pull-up.
 
-```text
-+3V3_MAIN pull-up --> MCU-side status node --> 1 kOhm Rprot --> STATUS
-```
+![Injector status](../diagrams/injector-status.svg)
 
 The 3.3 V pull-up is within the pin rating and provides a safe MCU logic level.
 The diagnostic path supports off-state open-load detection and indicates
@@ -84,9 +71,7 @@ separate, unambiguous MCU-readable short-circuit/current-limit indication.
 
 Define `INJ_PGND` as the injector module's high-current return domain.
 
-```text
-VNL5050 SOURCE --> short, low-impedance INJ_PGND copper --> power-entry ground star
-```
+![Injector ground](../diagrams/injector-ground.svg)
 
 - `INJ_PGND` runs directly to the power-entry ground star, where it joins the
   battery return, `IGN_PGND`, `DGND`, and sensor return domains.