DTC P0706: Transmission Range Switch Open

NOTE: 

• Before you troubleshoot, review the General Troubleshooting Information - Refer to: HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS or How to Troubleshoot the CVT System(CVT) .
• This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

DTC (CVT)

1. Problem verification:

   - 1. Make sure the shift cable is properly adjusted .

   - 2. Turn the vehicle to the ON mode.

   - 3. Compare the transmission range switch signal inputs with the HDS to the following table, in each shift lever position/mode.

   	A/T P Switch	A/T R Switch	A/T N Switch	A/T D Switch	A/T S Switch	A/T L Switch*	Forward Switch	Reverse Switch
   P	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF
   R	OFF	ON	OFF	OFF	OFF	OFF	OFF	ON
   N	OFF	OFF	ON	OFF	OFF	OFF	OFF	OFF
   D	OFF	OFF	OFF	ON	OFF	OFF	ON	OFF
   S	OFF	OFF	OFF	OFF	ON	OFF	ON	OFF
   L*	OFF	OFF	OFF	OFF	OFF	ON	ON	OFF

   *: Without paddle shifter

   Signal	Current conditions
   	Values	Unit
   A/T P Switch
   A/T R Switch
   A/T N Switch
   A/T D Switch
   A/T S Switch
   A/T L Switch*
   Forward Switch
   Reverse Switch

   *: Without paddle shifter

   Are the transmission range switch signals OK?

   YES 

   Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between the transmission range switch and the PCM. 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.

   NO 

   The failure is duplicated. Go to step 2.

2. Transmission range switch signal check:

   - 1. Compare the transmission range switch signal inputs with the HDS to the following table, in each shift lever position/mode.

   	A/T P Switch	A/T R Switch	A/T N Switch	A/T D Switch	A/T S Switch	A/T L Switch*	Forward Switch	Reverse Switch
   P	ON	OFF	OFF	OFF	OFF	OFF	OFF	OFF
   R	OFF	ON	OFF	OFF	OFF	OFF	OFF	ON
   N	OFF	OFF	ON	OFF	OFF	OFF	OFF	OFF
   D	OFF	OFF	OFF	ON	OFF	OFF	ON	OFF
   S	OFF	OFF	OFF	OFF	ON	OFF	ON	OFF
   L*	OFF	OFF	OFF	OFF	OFF	ON	ON	OFF

   *: Without paddle shifter

   Signal	Current conditions
   	Values	Unit
   A/T P Switch
   A/T R Switch
   A/T N Switch
   A/T D Switch
   A/T S Switch
   A/T L Switch*
   Forward Switch
   Reverse Switch

   *: Without paddle shifter

   Do all transmission range switch signals remain OFF?

   YES 

   Go to step 5.  5

   NO 

   Record the abnormal circuit, then go to step 3.

3. Transmission range switch check:

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

   - 2. Disconnect the following connector.

   Transmission range switch 10P connector

   - 3. Connect the transmission range switch connector terminal that did not indicate ON in step 2 to body ground with a jumper wire; refer to the following table.

   Signal	Transmission range switch 10P connector
   	Terminal number	Terminal name
   A/T P Switch	4	ATP-P
   A/T R Switch	3	ATP-R
   A/T N Switch	8	ATP-N
   A/T D Switch	2	ATP-D
   A/T S Switch	7	ATP-S
   A/T L Switch*	1	ATP-L
   Forward Switch	6	ATP-FWD
   Reverse Switch	10	ATP-RVS

   *: Without paddle shifter

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

   - 4. Turn the vehicle to the ON mode.

   - 5. Check the transmission range switch signal that did not indicate ON with the HDS.

   Does the transmission range switch signal indicate ON?

   YES 

   Replace the transmission range switch .

   NO 

   The transmission range switch is OK. Go to step 4.

4. Open wire check (corresponding line):

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

   - 2. Jump the SCS line with the HDS.

   SCS Short

   - 3. Disconnect the following connectors.

   PCM connector A (51P)

   PCM connector C (51P)

   - 4. Check for continuity between the transmission range switch connector terminal and the PCM terminal of the input which indicated OFF. Refer to the following table.

   	ATP-P	ATP-R	ATP-N	ATP-D	ATP-S	ATP-L*	ATP-FWD	ATP-RVS
   PCM	A10	A9	C24	C25	C43	C44	C26	C23
   Transmission range switch	4	3	8	2	7	1	6	10

   *: Without paddle shifter

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

   Is there continuity?

   YES 

   The wires are OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If DTC P0706 goes away and the PCM was updated, troubleshooting is complete. If DTC P0706 goes away and the PCM was substituted, replace the original PCM .

   NO 

   Repair an open in the wire between the corresponding transmission range switch connector terminal and the PCM.

5. Open wire check (PG3 line):

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

   - 2. Disconnect the following connector.

   Transmission range switch 10P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Transmission range switch 10P connector: disconnected
   Test point 1	Transmission range switch 10P connector No. 5
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   The PG3 wire is OK. Replace the transmission range switch .

   NO 

   Repair an open in the PG3 wire between the transmission range switch and ground (G101), or repair poor ground (G101).