DTC P271A

DTC P271A  : Park Pawl Position Sensor A Circuit Low

Special Tools Required 

SPLINE HOLDER, DETENT SHAFT 070AB-5M50100 

NOTE:  Before you troubleshoot, review the General Troubleshooting Information .

DTC (Gear)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode, and wait for at least 10 seconds.

   -5. With the brake pedal pressed and the accelerator released, shift the transmission to N position/mode, then shift back to P position/mode, and wait for at least 5 seconds.

   -6. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P271A Park Pawl Position Sensor A Circuit Low

   Is DTC P271A indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the park pawl actuator and the park pawl actuator driver unit. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Shorted wire check (RA line, RB line to power)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Park pawl actuator 10P connector

   Park pawl actuator driver unit 26P connector

   -3. Measure the voltage between the following test points and body ground individually.

   Test condition	Vehicle OFF (LOCK) mode
   	Park pawl actuator 10P connector: disconnected
   	Park pawl actuator driver unit 26P connector: disconnected

   Connector	Terminal
   Park pawl actuator 10P connector (female terminals):	No. 3
   	No. 5

   Courtesy of HONDA, U.S.A., INC.

   Is there voltage?

   YES 

   Repair a short to power in the RA wire and/or the RB wire between the park pawl actuator and the park pawl actuator driver unit.

   NO 

   The RA wire and/or the RB wire are not shorted to power. Go to step 3.

3. Shorted wire check (RA line, RB line to ground)

   -1. Measure the resistance between the following test points and body ground individually.

   Test condition	Vehicle OFF (LOCK) mode
   	Park pawl actuator 10P connector: disconnected
   	Park pawl actuator driver unit 26P connector: disconnected

   Connector	Terminal
   Park pawl actuator 10P connector (female terminals):	No. 3
   	No. 5

   Courtesy of HONDA, U.S.A., INC.

   Is there 1 MΩ or more?

   YES 

   The RA wire and/or the RB wire are not shorted to ground. Go to step 4.

   NO 

   Repair a short to ground in the RA wire and/or the RB wire between the park pawl actuator and the park pawl actuator driver unit.

4. Open wire check (RA/P-ACT_RA line, RB/P-ACT_RB line)

   -1. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Park pawl actuator 10P connector: disconnected
   	Park pawl actuator driver unit 26P connector: disconnected
   Test point 1	Park pawl actuator 10P connector (female terminals) No. 3:
   Test point 2	Park pawl actuator driver unit 26P connector No. 22

   Test point 1	Park pawl actuator 10P connector (female terminals) No. 5:
   Test point 2	Park pawl actuator driver unit 26P connector No. 21

   Courtesy of HONDA, U.S.A., INC.

   Is there 1.0 Ω or less?

   YES 

   The RA/P-ACT_RA wire and the RB/P-ACT_RB wire are OK. Go to step 5.

   NO 

   Repair an open in the RA/P-ACT_RA wire and/or the RB/P-ACT_RB wire between the park pawl actuator and the park pawl actuator driver unit.

5. Shorted wire check (EENC/P-ACT EENC line to power)

   -1. Connect the following connector.

   Park pawl actuator driver unit 26P connector

   -2. Turn the vehicle to the ON mode.

   -3. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Park pawl actuator 10P connector: disconnected
   Test point 1	Park pawl actuator 10P connector (female terminals) No. 8:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there voltage?

   YES 

   Repair a short to power in the EENC/P-ACT EENC wire between the park pawl actuator and the park pawl actuator driver unit.

   NO 

   The EENC/P-ACT EENC wire is not shorted to power. Go to step 6.

6. Open wire check (EENC/P-ACT_EENC line, VENC/P-ACT_VENC line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Park pawl actuator driver unit 26P connector

   -3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Park pawl actuator 10P connector: disconnected
   	Park pawl actuator driver unit 26P connector: disconnected
   Test point 1	Park pawl actuator 10P connector (female terminals) No. 8:

   Test point 2

   Park pawl actuator driver unit 26P connector No. 19

   Test point 1	Park pawl actuator 10P connector (female terminals) No. 9:
   Test point 2	Park pawl actuator driver unit 26P connector No. 20

   Courtesy of HONDA, U.S.A., INC.

   Is there 1.0 Ω or less?

   YES 

   The EENC/P-ACT_EENC wire and the VENC/P-ACT_VENC wire are not open. Go to step 7.

   NO 

   Repair an open in the EENC/P-ACT_EENC wire and/or the VENC/P-ACT_VENC wire between the park pawl actuator and the park pawl actuator driver unit.

7. Shorted wire check (EENC line, VENC line)

   -1. Measure the resistance between the following test points and body ground individually.

   Test condition	Vehicle OFF (LOCK) mode
   	Park pawl actuator 10P connector: disconnected
   	Park pawl actuator driver unit 26P connector: disconnected

   Connector	Terminal
   Park pawl actuator 10P connector (female terminals):	No. 8
   	No. 9

   Courtesy of HONDA, U.S.A., INC.

   Is there 1 MΩ or more?

   YES 

   The EENC wire and the VENC wire are OK. Go to step 8.

   NO 

   Repair a short to ground in the EENC wire and/or the VENC wire between the park pawl actuator and the park pawl actuator driver unit.

8. Park pawl actuator driver unit check

   -1. Substitute a known-good park pawl actuator driver unit .

   -2. Connect the following connectors.

   Park pawl actuator 10P connector

   Park pawl actuator driver unit 26P connector

   -3. Turn the vehicle to the ON mode.

   -4. Update the park pawl actuator driver unit .

   WARNING:

   Do not turn the vehicle to the OFF (LOCK) mode. Turing the vehicle to the OFF (LOCK) mode during an update can damage the park pawl actuator driver unit.

   -5. Clear the DTC with the HDS.

   -6. Turn the vehicle to the OFF (LOCK) mode.

   -7. Turn the vehicle to the ON mode, and wait for at least 5 seconds.

   -8. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P271A Park Pawl Position Sensor A Circuit Low

   Is DTC P271A indicated?

   YES 

   The park pawl actuator driver unit is OK. Go to step 9.

   NO 

   Replace the original park pawl actuator driver unit .

9. Transmission park mechanism check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Remove the park pawl actuator .

   -3. Set the detent shaft spline holder (A) to the detent shaft (B).

   Courtesy of HONDA, U.S.A., INC.

   -4. Use a torque wrench (C) and the socket (D) to rotate the detent shaft, and check that the detent shaft moves smoothly. Move it back and forth between the P position (E) and the P released position (F) several times.

   • -

     Operation angle: approx. 21 deg.

   • -

     Operation torque: approx. 4.0 N.m (0.41 kgf.m, 3.0 lbf.ft)

   -5. Check that the wheels are locked when putting the detent shaft in the P position. Additionally, check that the wheels rotate when putting the detent shaft in the P released position.

   Is the transmission park mechanism OK?

   YES 

   The transmission park mechanism is OK. Put the detent shaft in the P position, and replace the park pawl actuator .

   NO 

   Faulty transmission park mechanism. Replace the transmission (e-CVT) .