Acura RL. Instruction — page 271

11. 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 ).

12. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 2 seconds in R, then

shift to N.

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

Is DTC P1717 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.

14. Monitor the OBD STATUS for P1717 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 DTCS 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 12 and
recheck.

15. Clear the DTC with the HDS.

16. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 2 seconds in R, then

shift to N.

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

Is DTC P1717 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 18.

18. Monitor the OBD STATUS for P1717 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 17, go to the INDICATED
DTCS TROUBLESHOOTING
.

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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 P1743: Problem in Shift Control System; Shift Valve E Stuck OFF

1. Warm up the engine to normal operating temperature (the radiator fan comes on).

2. Make sure that the transmission is filled to the proper level, and check for fluid leaks.

3. Drain the ATF (see step 4 ) through a strainer. Inspect the strainer for metal debris or excessive clutch

material.

Does the strainer have metal debris or excessive clutch material?

YES — Replace the transmission, then go to step 8.

NO — Replace the ATF (see step 6 ), then go to step 4.

4. Clear the DTC with the HDS.

5. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

6. Turn the ignition switch to LOCK (0). Repeat step 5, then go to step 7.

7. Monitor the OBD STATUS for P1743 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?

YES — Repair shift valve E in the main valve body (see VALVE BODY ), replace the main valve body,
or replace the transmission, then go to step 8.

NO — Intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, return
to step 5 and recheck.

8. Clear the DTC with the HDS.

9. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

10. Turn the ignition switch to LOCK (0). Repeat step 9, then go to step 11.

11. Monitor the OBD STATUS for P1743 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES — Troubleshooting is complete.

NOTE:

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

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NO — Return to step 8 and recheck. If the HDS indicates NOT COMPLETED, return to step 9 and
recheck.

DTC P1744: Problem in Shift Control System; Shift Valve E Stuck ON

1. Warm up the engine to normal operating temperature (the radiator fan comes on).

2. Make sure that the transmission is filled to the proper level, and check for fluid leaks.

3. Drain the ATF (see step 4 ) through a strainer. Inspect the strainer for metal debris or excessive clutch

material.

Does the strainer have metal debris or excessive clutch material?

YES — Replace the transmission, then go to step 8.

NO — Replace the ATF (see step 6 ), then go to step 4.

4. Clear the DTC with the HDS.

5. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

6. Turn the ignition switch to LOCK (0). Repeat step 5, then go to step 7.

7. Monitor the OBD STATUS for P1744 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?

YES — Repair shift valve E in the main valve body (see VALVE BODY ), replace the main valve body,
or replace the transmission, then go to step 8.

NO — Intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, return
to step 4 and recheck.

8. Clear the DTC with the HDS.

9. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

10. Turn the ignition switch to LOCK (0). Repeat step 9, then go to step 11.

11. Monitor the OBD STATUS for P1744 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES — Troubleshooting is complete.

NOTE:

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

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NO — Return to step 8 and recheck. If the HDS indicates NOT COMPLETED, return to step 9 and
recheck.

DTC P1745: Problem in Shift Control System; Servo Control Valve Stuck OFF or Servo Control Valve Stuck ON

1. Warm up the engine to normal operating temperature (the radiator fan comes on).

2. Make sure that the transmission is filled to the proper level, and check for fluid leaks.

3. Drain the ATF (see step 4 ) through a strainer. Inspect the strainer for metal debris or excessive clutch

material.

Does the strainer have metal debris or excessive clutch material?

YES — Replace the transmission, then go to step 8.

NO — Replace the ATF (see step 6 ), then go to step 4.

4. Clear the DTC with the HDS.

5. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

6. Turn the ignition switch to LOCK (0). Repeat step 5, then go to step 7.

7. Monitor the OBD STATUS for P1745 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?

YES — Repair the servo control valve in the main valve body (see VALVE BODY ), servo valve in the
regulator valve body (see ATF PUMP INSPECTION ), or replace the main valve body, regulator valve
body, or replace the transmission, then go to step 8.

NO — Intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, return
to step 5 and recheck.

8. Clear the DTC with the HDS.

9. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through

all five gears, then slow down to a stop.

10. Turn the ignition switch to LOCK (0). Repeat step 9, then go to step 11.

11. Monitor the OBD STATUS for P1745 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES — Troubleshooting is complete.

NOTE:

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

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission — RL

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