Index: firmware/App/Modes/FPModes/FPModeFault.c
===================================================================
diff -u -rd79faa7118db6d048ce3433224b3e5a478c97a98 -r3e1af7cc2576e347ab8bdf2f400196b2301def07
--- firmware/App/Modes/FPModes/FPModeFault.c	(.../FPModeFault.c)	(revision d79faa7118db6d048ce3433224b3e5a478c97a98)
+++ firmware/App/Modes/FPModes/FPModeFault.c	(.../FPModeFault.c)	(revision 3e1af7cc2576e347ab8bdf2f400196b2301def07)
@@ -1,17 +1,17 @@
 /**************************************************************************
 *
-* Copyright (c) 2024-2024 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2025-2026 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    FPModeFault.c
 *
-* @author  (last)      Michael Garthwaite
-* @date    (last)      28-Feb-2025
+* @author  (last)      Raghu Kallala
+* @date    (last)      31-Mar-2026
 *
 * @author  (original)  Michael Garthwaite
-* @date    (original)  28-Feb-2025
+* @date    (original)  08-Sep-2025
 *
 ***************************************************************************/
 
@@ -299,11 +299,74 @@
             }
         }
     }
-    // Defeatured System. Only have m4 to control
+    // Defeatured System. Only have m4 and m12 to control
     else
     {
-        setValveState( M4_VALV, VALVE_STATE_CLOSED);
+        setValveState( M4_VALV, VALVE_STATE_CLOSED );
+        setValveState( M12_VALV, VALVE_STATE_CLOSED );
     }
 }
 
+
+/*************************************************************************
+ *                       TEST SUPPORT FUNCTIONS
+ *************************************************************************/
+
+
+/*********************************************************************//**
+ * @brief
+ * The testValidateFaultChangeReq function validate whether
+ * requested sub mode change is legal or not.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return TRUE if request is legal, FALSE if not.
+ *************************************************************************/
+BOOL testValidateFaultChangeReq( U32 newSubMode )
+{
+    BOOL result = FALSE;
+
+    if ( newSubMode < NUM_OF_FP_FAULT_STATES )
+    {
+        switch ( newSubMode )
+        {
+            case FP_FAULT_STATE_START:
+            case FP_FAULT_DEENERGIZED_STATE:
+            case FP_FAULT_ENERGIZED_STATE:
+            default:
+                result = TRUE;
+                break;
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The testSignalNewFaultSubMode function requests transition
+ * to a new fault sub mode.
+ * @details \b Inputs: none
+ * @details \b Outputs: faultState
+ * @param newSubMode the enumerated sub state of the mode.
+ * @return none
+ *************************************************************************/
+void testSignalNewFaultSubMode( U32 newSubMode )
+{
+    if ( newSubMode < NUM_OF_FP_FAULT_STATES )
+    {
+        faultState = (FP_FAULT_STATE_T)newSubMode;
+        // handle the prerequisite if any
+        switch ( newSubMode )
+        {
+            // Any of these state require no special handling
+            case FP_FAULT_STATE_START:
+            case FP_FAULT_DEENERGIZED_STATE:
+            case FP_FAULT_ENERGIZED_STATE:
+            default:
+                break;
+        }
+    }
+}
+
 /**@}*/