Acura TSX / Honda Accord CL. Manual - part 937

Fig. 64: D Position: Driving In 3rd Gear Hydraulic Flow 

D Position: Shifting between 3rd gear & 4th gear 

As the speed of the vehicle reaches the prescribed value, the PCM turns shift solenoid valves C OFF, and keeps 
A, B, D, and E OFF. Shift solenoid valve C pressure (SC) in the right side of the shift valve C is released. Shift 
valve C is moved to the right side to uncover the ports of A/T clutch pressure control solenoid valves B and C 
pressures leading to the 3rd and 4th clutches. The PCM controls the A/T clutch pressure control solenoid valves 
to regulate hydraulic pressure. A/T clutch pressure control solenoid valve B pressure changes to 3rd clutch 
pressure (30) at the shift valve A, and A/T clutch pressure control solenoid valve B pressure (56) changes to 4th 
clutch pressure (40) at the shift valve B. The 3rd and 4th clutches are engaged gently. 

NOTE:

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

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

Fig. 65: D Position: Shifting Between 3rd Gear & 4th Gear Hydraulic Flow 

D Position: Driving in 4th gear 

The PCM turns shift solenoid valves A ON, and keeps B, C, D, and E OFF. Shift solenoid valve A pressure 
(SA) is applied to the right side of shift valve A. Shift valve A is moved to the left side to cover the ports of A/T 
clutch pressure control solenoid valves A and C leading to the 2nd and 3rd clutches. 

A/T clutch pressure control solenoid valve B pressure (56) changes to (5G) at the shift solenoid valve C, and 
becomes 4th clutch pressure (40) at the shift valve B. The 4th clutch pressure (40) is held to high by A/T clutch 
pressure control solenoid valve B, and the 4th clutch is engaged securely. 

NOTE:

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

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

Fig. 66: D Position: Driving In 4th Hydraulic Flow 

D Position: Shifting between 4th gear & 5th gear 

As the speed of the vehicle reaches the prescribed value, the PCM turns shift solenoid valves D ON, and keeps 
A ON, and B, C, and E OFF. Shift solenoid valve D pressure (SD) in applied to the left side of the shift valve D. 
Shift valve D is moved to the right side to uncover A/T clutch pressure control solenoid valve C pressure to the 
5th clutch. A/T clutch pressure control solenoid valve B pressure (56) changes to 4th clutch pressure (40) at 
shift valve B. A/T clutch pressure control solenoid valve C pressure (57) changes to (5L) at shift valve D and to 
(5N) at shift valve B, and becomes 5th clutch pressure (50) at shift valve A. The 4th and 5th clutches are 
engaged gently. 

NOTE:

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

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

Fig. 67: D Position: Shifting Between 4th Gear & 5th Gear Hydraulic Flow 

D Position: Driving in 5th gear 

The PCM turns shift solenoid valves C ON, and keeps A and D ON, and B and E OFF. Shift solenoid valve C 
pressure (SC) is applied to the right side of shift valve C. Shift valve C is moved to the left side to switch the 
port of A/T clutch pressure control solenoid valve B pressure to the 4th clutch. 

The 5th clutch pressure (50) is held to high by the A/T clutch pressure control solenoid valve C, and the 5th 
clutch is engaged securely. 

NOTE:

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

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed