diff --git a/firmware/config/engines/honda_obd1.cpp b/firmware/config/engines/honda_obd1.cpp
index 85e868adfb..6be73de47b 100644
--- a/firmware/config/engines/honda_obd1.cpp
+++ b/firmware/config/engines/honda_obd1.cpp
@@ -37,6 +37,7 @@ void setHondaObd1() {
 
  	engineConfiguration->idle.solenoidPin = Gpio::MM100_INJ8;
  	engineConfiguration->malfunctionIndicatorPin = Gpio::MM100_INJ7;
+	engineConfiguration->acRelayPin = Gpio::MM100_OUT_PWM1;
 
 	engineConfiguration->camInputs[0] = Gpio::MM100_UART8_RX; // "C18 VR1+ Discrete"
 	engineConfiguration->camInputs[1] = Gpio::Unassigned;