From 98458da2f11e259aa568d7c9ef8aa3cf899aef99 Mon Sep 17 00:00:00 2001
From: rusefi <arro239+rusefi@gmail.com>
Date: Thu, 6 Jul 2017 21:26:35 -0400
Subject: [PATCH] docs

---
 firmware/controllers/core/fsio_impl.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/firmware/controllers/core/fsio_impl.cpp b/firmware/controllers/core/fsio_impl.cpp
index e5539d9c99..c0cf1b3d9c 100644
--- a/firmware/controllers/core/fsio_impl.cpp
+++ b/firmware/controllers/core/fsio_impl.cpp
@@ -377,6 +377,9 @@ void runFsio(void) {
 		enginePins.mainRelay.setValue(true);
 #endif /* EFI_MAIN_RELAY_CONTROL */
 
+	/**
+	 * o2 heater is off during cranking
+	 */
 	enginePins.o2heater.setValue(engine->rpmCalculator.isRunning());
 
 	if (boardConfiguration->acRelayPin != GPIO_UNASSIGNED) {