Acura RL. Manual - part 40

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The vehicle speed measured by the input shaft (mainshaft) speed sensor/(divided by) the vehicle speed 
measured by the output shaft (countershaft) speed sensor is greater than 6.0 for at least 10 seconds. 

Driving Pattern 

Start the engine, and drive the vehicle at a speed of 13 mph (20 km/h) or more for at least 10 seconds. 



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, the MIL comes on and the DTC and the freeze frame data are stored in the 
PCM memory. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the 
diagnostic runs. 

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

DTC P0722 (9): ADVANCED DIAGNOSTICS 

DTC P0722: PROBLEM IN OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR CIRCUIT 
(NO SIGNAL INPUT) 

Condition

Minimum

Maximum

Battery 
voltage

11.0 V

-

Engine speed

500 rpm

-

Vehicle speed 13 mph (20 km/h)

-

Shift lever 
position

D, D3

No active 
DTCs

P0705, P0706, P0716, P0717, P0722, P0962, P0963, P0966, P0967, P0970, P0971, 
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983

Others

Not during shifting
Not when the shift lever is being shifted
No electrical noise in the input shaft (mainshaft) speed sensor output circuit
Except 1st gear

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 157  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 115: Output Shaft Speed Sensor Circuit Diagram 

Fig. 116: Vehicle Speed Graph 

General Description 

The output shaft (countershaft) speed sensor is attached to the outside of the transmission housing. The 
output shaft (countershaft) speed sensor generates a pulsing signal according to the speed of the park gear on 
the output shaft (countershaft). Using that signal, the powertrain control module (PCM) determines the 
speed of the output shaft (countershaft). If pulse dropouts occur with the output shaft (countershaft) rotating, 
the PCM detects a malfunction that may be caused by an open, a temporary open, or a short to ground. 
Based on the correlation between the vehicle speed measured by the output shaft (countershaft) speed sensor 
and the input shaft (mainshaft) speed sensor, a malfunction is detected and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

Execution

Continuous

Sequence

None

Duration

10 seconds or more

DTC Type

One drive cycle, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 158  © 2005 Mitchell Repair Information Company, LLC. 

ENABLE CONDITIONS 

Malfunction Threshold 

When the vehicle speed measured by the input shaft (mainshaft) speed sensor is 13 mph (20 km/h) or more, 
the vehicle speed measured by the output shaft (countershaft) speed sensor is 1 mph (2 km/h) or less for at 
least 10 seconds. 

Driving Pattern 

Start the engine, and drive the vehicle at a speed of 13 mph (20 km/h) or more for at least 10 seconds. 



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, the MIL comes on and the DTC and the freeze frame data are stored in the 
PCM memory. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the 
diagnostic runs. 

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

DTC P0723 (9): ADVANCED DIAGNOSTICS 

DTC P0723: OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR INTERMITTENT FAILURE 

Condition

Minimum

Maximum

Battery 
voltage

11.0 V

-

Engine speed

500 rpm

-

Vehicle speed 13 mph (20 km/h)

-

Shift lever 
position

D, D3

No active 
DTCs

P0705, P0706, P0716, P0717, P0721, P0962, P0963, P0966, P0967, P0970, P0971, 
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983

Others

Not during shifting
Not when the shift lever is being shifted
No electrical noise in the input shaft (mainshaft) speed sensor output circuit
Except 1st gear

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 159  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 117: Output Shaft Speed Sensor - Circuit Diagram 

Fig. 118: Vehicle Speed Graph 

General Description 

The output shaft (countershaft) speed sensor is attached to the outside of the transmission housing. The 
output shaft (countershaft) speed sensor generates a pulsing signal according to the speed of the park gear on 
the output shaft (countershaft). Using that signal, the powertrain control module (PCM) determines the 
speed of the output shaft (countershaft). If pulse dropouts occur with the output shaft (countershaft) rotating, 
the PCM detects a malfunction that may be caused by an open, a temporary open, or a short to ground. 
Based on the fluctuation of the vehicle speed measured by the output shaft (countershaft) speed sensor, a 
malfunction is detected and a DTC is stored. 

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

MONITOR DESCRIPTION CHART 

Enable Conditions 

Execution

Continuous

Sequence

None

Duration

500 milliseconds

DTC Type

Two drive cycles, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:04 PM

Page 160  © 2005 Mitchell Repair Information Company, LLC.