Acura RL. Instruction — page 239

Is there about 5 V?

YES — Go to step 22.

NO — Go to step 26.

22. Connect the input shaft (mainshaft) speed sensor connector.

23. Measure the voltage between PCM connector terminals D8 and A3 or B15.

Fig. 99: Measuring Voltage Between PCM Connector Terminals D8 And A3 Or B15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there voltage 0 V or about 5 V?

YES — Go to step 24.

NO — Replace the input shaft (mainshaft) speed sensor (see INPUT SHAFT (MAINSHAFT) SPEED
SENSOR REPLACEMENT
), then go to step 37.

24. Shift to P. Start the engine, and let it idle.

25. With the engine idling, measure the voltage between PCM connector terminals D8 and A3 or B15.

Fig. 100: Measuring Voltage Between PCM Connector Terminals D8 And A3 Or B15

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Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 1.5-3.5 V?

YES — Go to step 31.

NO — Replace the input shaft (mainshaft) speed sensor (see INPUT SHAFT (MAINSHAFT) SPEED
SENSOR REPLACEMENT
), then go to step 37.

26. Measure the voltage between PCM connector terminals D8 and A3 or B15.

Fig. 101: Measuring Voltage Between PCM Connector Terminals D8 And A3 Or B15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES — Repair open in the wire between PCM connector terminal D8 and the input shaft (mainshaft) speed
sensor, then go to step 36.

NO — Go to step 31.

27. Measure the voltage between PCM connector terminals C14 and A3 or B15.

Fig. 102: Measuring Voltage Between PCM Connector Terminals C14 And A3 Or B15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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Is there about 5 V?

YES — Repair open in the wire between PCM connector terminal C14 and the input shaft (mainshaft)
speed sensor, then go to step 36.

NO — Go to step 28.

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

29. Disconnect PCM connector C (22P).

30. Check for continuity between PCM connector terminal C14 and body ground.

Fig. 103: Checking Continuity Between PCM Connector Terminal C14 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between PCM connector terminal C14 and the input shaft (mainshaft)
speed sensor, then go to step 36.

NO — Go to step 31.

31. Reconnect all connectors.

32. 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 ).

33. Start the engine. Run the vehicle in either 2nd, 3rd, 4th, or 5th gear (not 1st) in M (sequential sportshift

mode) at speeds over 12 mph (20 km/h) and an engine speed of 500 rpm or higher, for at least 10
seconds. Slow down and stop the wheels.

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

Is DTC P0716 or P0717 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 35.

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35. Monitor the OBD STATUS for P0716 or P0717 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 34, go to the
INDICATED DTCS TROUBLESHOOTING.

NO — Check for poor connections and loose terminals at the input shaft (mainshaft) 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 33 and recheck.

36. Reconnect all connectors.

37. Clear the DTC with the HDS.

38. Start the engine. Run the vehicle in either 2nd, 3rd, 4th, or 5th gear (not 1st) in M (sequential sportshift

mode) at speeds over 12 mph (20 km/h) and an engine speed of 500 rpm or higher, for at least 10
seconds. Slow down and stop the wheels.

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

Is DTC P0716 or P0717 indicated?

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

NO — Go to step 40.

40. Monitor the OBD STATUS for P0716 or P0717 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 39, go to the INDICATED
DTCS TROUBLESHOOTING
.

NO — Check for poor connections and loose terminals at the input shaft (mainshaft) speed sensor and the
PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 38 and recheck.

DTC P0718: Input Shaft (Mainshaft) Speed Sensor Intermittent Failure

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

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