Auto-Stop System

Under certain conditions, the ECM stops the engine to conserve fuel and minimize tailpipe emissions when the vehicle comes to a stop. When this happens, the AUTO-STOP indicator comes on, either as a steady or a blinking light, to alert the driver that the auto-stop system is on.

Fig 1: Identifying IMA System (Auto-Stop System)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

The engine will not enter auto-stop mode under these conditions: 

• When the transmission is in the R position, L position, or S mode.
• When the vehicle is stopped using heavy braking.
• When the AUTO or DEF button of the climate control unit is pushed, or when the passenger compartment temperature has not stabilized at the set temperature.
• When the engine coolant temperature is about 122°F (50°C) or below.
• For about 2 minutes after starting the engine.
• When the battery state of charge is low.
• When the electric load on the 12 V system is high.
• When the accelerator pedal is pressed.
• When an auto-stop related component is faulty.
• When the MIL is on.
• When the climate control system is in the economy (ECON) mode and the outside temperature is below 41°F (5°C).

When the engine is stopped by auto-stop system, it will restart under these conditions: 

• When the transmission is moved into any position other than neutral with the clutch pedal pressed (M/T).
• When the accelerator pedal is pressed, the transmission is in neutral and the clutch pedal is pressed (M/T).
• When the brake pedal is released.
• When the accelerator pedal is pressed while the brake pedal is pressed.
• When the vehicle moves while the brakes are lightly applied.
• When the transmission is in the R position or the L position while the brake pedal is pressed (CVT).