Acura RL. Manual - part 43

valve failure in the supply route above is detected by the malfunction detection of each shift solenoid valve.) 
The powertrain control module (PCM) computes the ratio of the input shaft (mainshaft) speed to the output 
shaft (countershaft) speed. When the ratio is not the 3rd gear ratio, it is detected as a malfunction of the 
hydraulic circuit or the 3rd clutch, and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The actual gear ratio must match one of these conditions for at least 12 seconds with the 3rd gear command. 



Actual gear ratio is greater than the 3rd gear ratio by a factor of 1.2.  



Actual gear ratio is less than the 3rd gear ratio by a factor of 0.75.  

Driving Pattern 

Start the engine, shift to the D position, and drive the vehicle at a speed of 8 mph (12 km/h) or more for at 
least 12 seconds in 3rd gear. 



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

Diagnosis Details 

Conditions for illuminating the MIL 

Execution

Continuous

Sequence

None

Duration

12 seconds or more

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

-

Engine 
speed

1,000 rpm

-

Vehicle 
speed

8 mph (12 km/h)

-

Shift lever 
position

D

No active 
DTCs

P0116, P0117, P0118, P0122, P0123, P0705, P0706, P0716, P0717, P0718, P0721, 
P0722, P0723, P0731, P0732, P0734, P0735, P0746, P0747, P0751, P0752, P0756, 
P0757, P0761, P0762, P0776, P0777, P0796, P0797, P0962, P0963, P0966, P0967, 
P0970, P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1743, 
P1744, P1745, P1780

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

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Friday, June 05, 2009 2:32:04 PM

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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 P0734 (64): ADVANCED DIAGNOSTICS 

DTC P0734: PROBLEM IN 4TH CLUTCH AND 4TH CLUTCH HYDRAULIC CIRCUIT 

Fig. 126: 4th Clutch And 4th Clutch Hydraulic Work Flow

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 170  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 127: Gear Ratio VS Shift Status Graph 

General Description 

To engage 4th gear, line pressure is supplied to the 4th clutch piston, engaging the 4th clutch, and the input 
shaft (mainshaft) and the input shaft (mainshaft) 4th gear are connected and revolve together. Hydraulic 
pressure is supplied to the 4th clutch through the ATF strainer --> the ATF pump --> the regulator valve --> 
the manual valve --> the shift valves --> the feed pipe --> 4th clutch piston. (A shift valve failure in the 
supply route above is detected by the malfunction detection of each shift solenoid valve.) The powertrain 
control module (PCM) computes the ratio of the input shaft (mainshaft) speed to the output shaft 
(countershaft) speed. When the ratio is not the 4th gear ratio, it is detected as a malfunction of the hydraulic 
circuit or the 4th clutch, and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Execution

Continuous

Sequence

None

Duration

12 seconds or more

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

-

Engine 
speed

1,000 rpm

-

Vehicle 
speed

8 mph (12 km/h)

-

Shift lever 

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 171  © 2005 Mitchell Repair Information Company, LLC. 

Malfunction Threshold 

The actual gear ratio must match one of these conditions for at least 12 seconds with the 4th gear command. 



Actual gear ratio is greater than the 4th gear ratio by a factor of 1.2.  



Actual gear ratio is less than the 4th gear ratio by a factor of 0.75.  

Driving Pattern 

Start the engine, shift to the D position, and drive the vehicle at a speed of 8 mph (12 km/h) or more for at 
least 12 seconds in 4th gear. 



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 P0735 (64): ADVANCED DIAGNOSTICS 

DTC P0735: PROBLEM IN 5TH CLUTCH AND 5TH CLUTCH HYDRAULIC CIRCUIT 

position

D

No active 
DTCs

P0116, P0117, P0118, P0122, P0123, P0705, P0706, P0716, P0717, P0718, P0721, 
P0722, P0723, P0731, P0732, P0733, P0735, P0746, P0747, P0751, P0752, P0756, 
P0757, P0761, P0762, P0776, P0777, P0796, P0797, P0962, P0963, P0966, P0967, 
P0970, P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983, P1743, 
P1744, P1745, P1780

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 172  © 2005 Mitchell Repair Information Company, LLC.