Acura RL. Manual - part 76

Fig. 247: Gear Position VS Shift Status Graph 

Hydraulic pressure supply to the clutch by shift solenoid valve output (D position) 

Fig. 248: Shift Solenoid Valve Output (D Position) 

General Description 

Shift valve E is incorporated in the control circuit of the transmission. It is controlled by pressure from shift 
solenoid valve B, and it is locked by the line pressure. It switches off when shift solenoid valve B turns off 
and shift solenoid valve A turns on. The PCM monitors the mainshaft speed and the countershaft speed at 
the gear change determined by the shift schedule. When an improper gear ratio is output compared to the 
predetermined gear change mode, a shift valve E OFF failure is detected and a DTC is stored. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

MONITOR DESCRIPTION CHART 

Execution

Continuous

Sequence

None

Duration

Depending on the driving pattern

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

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Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The transmission is in neutral against the 5th gear shift command for at least 2 seconds, without records that 
the engine speed flares when upshifting to 3rd - 4th. 

Driving Pattern 

Start the engine, and accelerate the vehicle until the transmission shifts into 5th gear in the D position. 



Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.  

Diagnosis Details 

Conditions for illuminating the MIL 

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the PCM 
memory. If the malfunction recurs during the next (second) drive cycle, the DTC and the freeze frame data 
are stored. The MIL does not come on. 

Conditions for clearing the MIL 

The DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear 
command or by disconnecting the battery. 

DTC P1744 (45): ADVANCED DIAGNOSTICS 

DTC P1744: PROBLEM IN SHIFT CONTROL SYSTEM; SHIFT VALVE E STUCK ON 

DTC Type

Two drive cycles, MIL OFF, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery 
voltage

11.0 V

-

Vehicle 
speed

5 mph (9 km/h)

-

Shift lever 
position

D, D3

No active 
DTCs

P0122, P0123, P0705, P0716, P0717, P0718, P0721, P0722, P0723, P0746, P0747, 
P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777, P0796, 
P0797, P0842, P0843, P0847, P0848, P0962, P0963, P0966, P0967, P0970, P0971, 
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1744, P1745

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:06 PM

Page 302  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 249: Shift Control System; Shift Valve E - Operation Diagram 

Fig. 250: Gear Position VS Shift Status Graph

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 303  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 251: Solenoid Valve Output Reference Chart (D Position) 

General Description 

Shift valve E is incorporated in the control circuit of the transmission. It is controlled by pressure from shift 
solenoid valve B, and it is locked by the line pressure. It switches off when shift solenoid valve B turns off 
and shift solenoid valve A turns on. The PCM monitors the mainshaft speed and the countershaft speed at 
the gear change determined by the shift schedule. When an improper gear ratio is output compared to the 
predetermined gear change mode, a shift valve E ON failure is detected and a DTC is stored. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The transmission is held in 5th gear against the 1st gear shift command after driving the vehicle in 3rd gear 

Execution

Continuous

Sequence

None

Duration

Depending on the driving pattern

DTC Type

Two drive cycles, MIL OFF, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery 
voltage

11.0 V

-

Vehicle 
speed

5 mph (9 km/h)

-

Shift lever 
position

D, D3

No active 
DTCs

P0122, P0123, P0705, P0716, P0717, P0718, P0721, P0722, P0723, P0746, P0747, 
P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0776, P0777, P0796, 
P0797, P0842, P0843, P0847, P0848, P0962, P0963, P0966, P0967, P0970, P0971, 
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1743, P1745

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 304  © 2005 Mitchell Repair Information Company, LLC.