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HOMESERVICE MANUALSACURA2008RLREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSIONSYSTEM DESCRIPTIONELECTRONIC CONTROL SYSTEMSHIFT CONTROL
2008 Acura RL

Shift Control

2008 Acura RLSECTION Shift Control

The PCM instantly determines which gear should be selected by various signals sent from sensors and switches, and it actuates shift solenoid valves A, B, C, and D to control gear selection.

There are two types of shift solenoid valves:

  • Shift solenoid valves A and D use the ON-OPEN/OFF-CLOSE type; the shift solenoid valve opens the port of shift solenoid valve pressure while the shift solenoid valve is turned ON by the PCM, and closes the port when shift solenoid valve is OFF.
  • Shift solenoid valves B and C use the ON-CLOSE/OFF-OPEN type; the shift solenoid valve closes the port of shift solenoid valve pressure while the shift solenoid valve is turned ON by the PCM, and opens the port when shift solenoid valve is OFF.

The combination of driving signals to shift solenoid valves A, B, C, and D are shown in the table.

SHIFT SOLENOID VALVES REFERENCE

Position Gear position Shift solenoid valves
A B C D
D and D3 Shifting from N OFF ON OFF OFF
Stays in 1st OFF ON ON OFF
Shifting gears between 1st and 2nd ON ON ON OFF or ON
Stays in 2nd ON ON OFF OFF or ON
Shifting gears between 2nd and 3rd ON ON ON OFF or ON
Stays in 3rd ON OFF ON OFF or ON
D Shifting gears between 3rd and 4th ON OFF OFF OFF or ON
Stays in 4th OFF OFF OFF OFF or ON
Shifting gears between 4th and 5th OFF OFF ON OFF or ON
Stays in 5th OFF ON ON OFF or ON
M 1st OFF ON ON OFF or ON
2nd ON ON OFF OFF or ON
3rd ON OFF ON OFF or ON
4th OFF OFF OFF OFF or ON
5th OFF ON ON OFF or ON
N Neutral OFF ON OFF OFF
R Shifting from P and N OFF ON OFF ON
Stays in reverse ON ON OFF ON
Reverse inhibit control OFF ON OFF OFF
P Park OFF ON OFF ON
RENDER: 1.0x

NO RELATED

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