Gear shift control (Honda CR-V 2)

Based on signals from various sensors and switches, the PCM instantly determines the selection of a particular gear and actuates the shift solenoid valves A, B, C and E.

To control gear shifting in the [D] position when driving uphill or downhill, the Grade Logic Control System is provided. By analyzing signals from the throttle position sensor, engine coolant temperature sensor, barometric pressure sensor, brake pedal position switch and selector position, the PCM compares the current driving conditions with the data stored in memory and controls gear shifting when driving uphill or downhill.

The PCM controls gear shifting by switching on and off the shift solenoid valves A, B, C and E. The combination of current driving condition signals that trigger shifting of the shift solenoid valves A, B, C and E are shown in the table below.

RSM Block

Position	Gear position	Gear shift solenoid valves
		A	IN	WITH	E
[D]	Switching from position [N]	OFF	ON	ON	OFF
	Remains on 1st	ON	ON	ON	OFF
	Shifting gears between 1st and 2nd	OFF	ON	ON	OFF
	Remains on 2nd	OFF	ON	OFF	OFF
	Shifting gears between 2nd and 3rd	OFF	ON	ON	OFF
	Remains on 3rd	OFF	OFF	ON	OFF
	Shifting gears between 3rd and 4th	OFF	OFF	OFF	OFF
	Remains on 4th	ON	OFF	OFF	OFF
[2]	2nd gear	OFF	ON	OFF	OFF
[1]	1st gear	ON	ON	ON	OFF
[R]	Switching from [P] and [N] position	OFF	ON	OFF	ON
	Remains in reverse gear	ON	ON	OFF	ON
	Reverse gear shift lock	OFF	OFF	ON	OFF
[R]	Parking	OFF	ON	OFF	ON
[N]	Neutral position	OFF	ON	ON	OFF