Driving in 1st Gear (engaged with 1st and 1st-hold clutches)

WARNING: This page is about a different car, the 2013 Honda Odyssey, 2012 Honda Odyssey, and 2011 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Line pressure (1) regulated by the regulator valve flows to shift solenoid valves. The PCM switches the shift solenoid valves ON and OFF. The conditions of the shift solenoid valves and the positions of the shift valves are as follows:

Shift solenoid valve A is OFF, and closes the shift solenoid valve A pressure port (SA); shift valve A remains on the left side.
Shift solenoid valve B is turned ON, and closes the shift solenoid valve B pressure port (SB); shift valve B and shift valve E remain on the left side.
Shift solenoid valve C is turned ON, and closes the shift solenoid valve C pressure port (SC); shift valve C and shift valve D remain on the left side.
Shift solenoid valve D is OFF, and closes the shift solenoid valve D pressure port (SD).

Line pressure (4) becomes 1st clutch pressure (10) at shift valve D, and flows to the 1st clutch. The 1st clutch is engaged. The PCM actuates A/T clutch pressure control solenoid valve C. A/T clutch pressure control solenoid valve C pressure (58) is applied to CPC valve C via the lock-up shift valve. CPC valve C regulates line pressure (4), and line pressure (4) becomes CPC C pressure (4C). CPC C pressure (4C) flows to shift valve B via shift valves D, E, and C, and becomes 1st-hold clutch pressure (15) at shift valve B. 1st-hold clutch pressure (15) is applied to the 1st-hold clutch, and the 1st-hold clutch is engaged.

NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.

Fig 1: Hydraulic Flow Diagram - Driving In 1st Gear (Engaged With 1st And 1st-Hold Clutches)

Courtesy of AMERICAN HONDA MOTOR CO., INC.