Acura RL. Manual - part 249

YES - Intermittent failure, the system is OK at this time.

NO - Follow the instructions indicated on the HDS by the test result, but if the HDS has not determined 
the cause of the failure, go to step 10. If any part is replaced, go to step 11. 

10. Inspect A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE CONTROL 

SOLENOID VALVE C TEST ). 

Does A/T clutch pressure control solenoid valve C work properly?  

YES - Repair the hydraulic system related with shift valve C, or replace the transmission, then go to step 
11. 

NO - Replace A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE 
CONTROL SOLENOID VALVE C REPLACEMENT ), then go to step 11. 

11. Clear the DTC with the HDS.  

12. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears, then 

slow down to a stop.  

13. Turn the ignition switch to LOCK (0). Repeat step 12, then go to step 14.  

14. Monitor the OBD STATUS for P0796 or P0797 in the DTCs/Freeze Data in A/T Mode Menu for a 

pass/fail. 

Does the HDS indicate PASSED?  

YES - Troubleshooting is complete. 

NO - Return to step 11 and recheck. If the HDS indicates NOT COMPLETED, return to step 12 and 
recheck. 

DTC P0812: Open in Transmission Range Switch ATP R Switch Circuit 

1. Turn the ignition switch to ON (II).  

2. Shift the shift lever into R, and verify the A/T R SWITCH signal with the HDS in the A/T data list. 

Is the A/T Ft SWITCH ON?  

YES - Intermittent failure, the system is OK at this time.

NOTE:



Before you troubleshoot, record all freeze data and any on-board 
snapshot, and review General Troubleshooting Information (see GENERAL 
TROUBLESHOOTING INFORMATION ).  



This code is caused by an electrical circuit problem and cannot be caused 
by a mechanical problem in the transmission.  

 

2007 Acura RL 

2005-08 TRANSMISSION Automatic Transmission - RL

  

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NO - Go to step 3. 

3. Turn the ignition switch to LOCK (0).  

4. Disconnect the transmission range switch connector.  

5. Check for continuity between transmission range switch connector terminal No. 5 and body ground. 

Fig. 120: Checking Continuity Between Transmission Range Switch Connector Terminal No. 5 And 
Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 6. 

NO - Repair open in the wire between the transmission range switch and ground (G101, G102), or repair 
poor ground (G101, G102), then go to step 15. 

6. Turn the ignition switch to ON (II).  

7. Measure the voltage between transmission range switch connector terminals No. 3 and No. 5. 

Fig. 121: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 3 And 
No. 5 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there voltage?  

 

2007 Acura RL 

2005-08 TRANSMISSION Automatic Transmission - RL

  

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YES - Go to step 8. 

NO - Repair open in the wire between the transmission range switch and PCM connector terminal D16, 
then go to step 15. 

8. Check for continuity between connector terminals No. 3 and No. 5 at the transmission range switch. 

Fig. 122: Checking Continuity Between Transmission Range Switch Connector Terminals No. 3 
And No. 5 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity when the shift lever is in R, and no continuity when the shift lever is shifted to any 
position other than R?  

YES - Check for poor connections and loose terminals at the transmission range switch and the PCM. If 
the connections are OK, go to step 9. 

NO - Replace the transmission range switch (see TRANSMISSION RANGE SWITCH 
REPLACEMENT ), then go to step 15. 

9. Connect the transmission range switch connector.  

10. Update the A/T software in the PCM if it does not have the latest software (see UPDATING THE 

PCM ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).  

11. Test-drive the vehicle in R at speeds below 3 mph (5 km/h) for at least 2 seconds, then increase the speed 

and test-drive at speeds over 3 mph (5 km/h) for at least 2 seconds. Slow down and stop the wheels.  

12. Turn the ignition switch to LOCK (0). Repeat step 11, then go to step 13.  

13. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS. 

Is DTC P0812 indicated?  

YES - If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), 
then recheck. If the PCM was substituted, go to step 1. 

NO - Go to step 14. 

 

2007 Acura RL 

2005-08 TRANSMISSION Automatic Transmission - RL

  

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14. Monitor the OBD STATUS for P0812 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. 

Does the HDS indicate PASSED?  

YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the 
original PCM (see PCM REPLACEMENT ). If any other DTCs were indicated on step 13, go to the 
INDICATED DTC'S TROUBLESHOOTING. 

NO - Check for poor connections and loose terminals at the transmission range switch and the PCM. If 
the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. 
If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 11 and 
recheck. 

15. Clear the DTC with the HDS.  

16. Test-drive the vehicle in R at speeds below 3 mph (5 km/h) for at least 2 seconds, then increase the speed 

and test-drive at speeds over 3 mph (5 km/h) for at least 2 seconds. Slow down and stop the wheels.  

17. Turn the ignition switch to LOCK (0). Repeat step 16, then go to step 18.  

18. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS. 

Is DTC P0812 indicated?  

YES - Check for poor connections and loose terminals at the transmission range switch and the PCM, 
then go to step 1. 

NO - Go to step 19. 

19. Monitor the OBD STATUS for P0812 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. 

Does the HDS indicate PASSED?  

YES - Troubleshooting is complete. If any other DTCs were indicated on step 18, go to the INDICATED 
DTC'S TROUBLESHOOTING. 

NO - Check for poor connections and loose terminals at the transmission range switch and the PCM, then 
go to step 1. If the HDS indicates NOT COMPLETED, return to step 16 and recheck. 

DTC P0815: Short in Transmission Gear Selection Switch Upshift Switch Circuit, or Transmission Gear Selection 
Switch Upshift Switch Stuck ON 

NOTE:



Before you troubleshoot, record all freeze data and any on-board 
snapshot, and review General Troubleshooting Information (see GENERAL 
TROUBLESHOOTING INFORMATION ).  



This code is caused by an electrical circuit problem and cannot be caused 
by a mechanical problem in the transmission.  

 

2007 Acura RL 

2005-08 TRANSMISSION Automatic Transmission - RL

  

me 

 

Friday, June 05, 2009 1:18:12 PM

Page 170 

© 2005 Mitchell Repair Information Company, LLC.