Acura RL. Instruction — page 243

Does the HDS indicate FAILED?

YES — Go to step 9.

NO — The troubleshooting is complete. If the HDS indicates NOT COMPLETED, return to step 7 and
recheck.

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

10. Jump the SCS line with the HDS.

11. Disconnect PCM connector B (24P).

12. Disconnect the output shaft (countershaft) speed sensor connector.

13. Check for continuity between output shaft (countershaft) speed sensor connector terminal No. 2 and body

ground.

Fig. 117: Checking Continuity Between Output Shaft (Countershaft) Speed Sensor Connector
Terminal No. 2 And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between PCM connector terminal B19 and the output shaft (countershaft)
speed sensor connector, then go to step 26.

NO — Go to step 14.

14. Connect PCM connector B (24P).

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

16. Measure the voltage between output shaft (countershaft) speed sensor connector terminal No. 2 and body

ground.

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2005-08 TRANSMISSION Automatic Transmission — RL

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Fig. 118: Measuring Voltage Between Output Shaft (Countershaft) Speed Sensor Connector
Terminal No. 2 And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES — Replace the output shaft (countershaft) speed sensor (see INPUT SHAFT (MAINSHAFT)
SPEED SENSOR REPLACEMENT
), then go to step 26.

NO — Go to step 17.

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

18. Disconnect PCM connector B (24P).

19. Check for continuity between PCM connector terminal B19 and output shaft (countershaft) speed sensor

connector terminal No. 2.

Fig. 119: Checking Continuity Between PCM Terminal B19 And Output Shaft (Countershaft)
Speed Sensor Terminal No. 2

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 20.

NO — Repair open in the wire between PCM connector terminal B19 and the output shaft (countershaft)

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speed sensor, then go to step 26.

20. Reconnect all connectors.

21. 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 ).

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

ail five gears at speeds over 12 mph (20 km/h). Slow down and stop the wheels.

23. Turn the ignition switch to LOCK (0). Repeat step 22, then go to step 24.

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

Is DTC P0723 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 25.

25. Monitor the OBD STATUS for P0723 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 24, go to the
INDICATED DTCS TROUBLESHOOTING.

NO — Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor 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 22 and recheck.

26. Reconnect all connectors.

27. Clear the DTC with the HDS.

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

all five gears at speeds over 12 mph (20 km/h). Slow down and stop the wheels.

29. Turn the ignition switch to LOCK (0). Repeat step 28, then go to step 30.

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

Is DTC P0723 indicated?

YES — Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and
the PCM, then go to step 1.

NO — Go to step 31.

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31. Monitor the OBD STATUS for P0723 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 30, go to the INDICATED
DTCS TROUBLESHOOTING
.

NO — Check for poor connections and loose terminals at the output shaft (countershaft) speed sensor and
the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 28 and recheck.

DTC P0731: Problem in 1st Clutch and 1st Clutch Hydraulic Circuit

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 11.

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

4. Measure the line pressure (see PRESSURE TEST ).

Is the line pressure within the service limits?

YES — Go to step 5.

NO — Repair the ATF pump and the regulator valve, or replace the transmission, then go to step 11.

5. Measure the 1st clutch pressure (see PRESSURE TEST ).

Is the 1st clutch pressure within the service limits?

YES — Go to step 6.

NO — Shift valves B and C are stuck. Repair these valves and the related hydraulic circuit, or replace the
transmission, then go to step 11.

6. Clear the DTC with the HDS.

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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