DTC P0706: Transmission Range Switch (Open); DTC P2801: Transmission Range Switch ATPFWD2 Switch (Open) (L4, DCT)

NOTE: 

• Before you troubleshoot, review the General Troubleshooting Information - Refer to: How to Troubleshoot the Dual Clutch Transmission (L4, DCT) .
• This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

DTC (A/T)

1. Problem verification

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

   - 2. Turn the vehicle to the ON mode.

   - 3. Check the parameter (s) below with the HDS in each shift lever position/mode.

   Signal	Threshold				Current conditions
   	P	R	N	D	Values	Unit
   A/T P Switch	ON	OFF	OFF	OFF
   A/T R Switch	OFF	ON	OFF	OFF
   A/T N Switch	OFF	OFF	ON	OFF
   A/T D Switch	OFF	OFF	OFF	ON
   Forward Switch (ATPFWD)	OFF	OFF	OFF	ON
   Forward Switch2 (ATPFWD)	OFF	OFF	OFF	ON
   Reverse Switch (ATPRVS)	OFF	ON	OFF	OFF
   Reverse Switch2 (ATPRVS)	OFF	ON	OFF	OFF

   Do the current condition (s) match the threshold?

   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. Check the parameter (s) below with the HDS in each shift lever position/mode.

   Signal	Threshold				Current conditions
   	P	R	N	D	Values	Unit
   A/T P Switch	ON	OFF	OFF	OFF
   A/T R Switch	OFF	ON	OFF	OFF
   A/T N Switch	OFF	OFF	ON	OFF
   A/T D Switch	OFF	OFF	OFF	ON
   Forward Switch (ATPFWD)	OFF	OFF	OFF	ON
   Forward Switch2 (ATPFWD)	OFF	OFF	OFF	ON
   Reverse Switch (ATPRVS)	OFF	ON	OFF	OFF
   Reverse Switch2 (ATPRVS)	OFF	ON	OFF	OFF

   Do all signals remain OFF?

   YES 

   Go to step 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 16P connector

   - 3. Connect the transmission range switch connector terminal that did not indicate ON in step 2-1 to ground with a jumper wire.

   - 4. Turn the vehicle to the ON mode.

   - 5. Check the parameter (s) below that did not indicate ON with the HDS.

   Signal	Threshold				Current conditions
   	P	R	N	D	Values	Unit
   A/T P Switch	ON	OFF	OFF	OFF
   A/T R Switch	OFF	ON	OFF	OFF
   A/T N Switch	OFF	OFF	ON	OFF
   A/T D Switch	OFF	OFF	OFF	ON
   Forward Switch (ATPFWD)	OFF	OFF	OFF	ON
   Forward Switch2 (ATPFWD)	OFF	OFF	OFF	ON
   Reverse Switch (ATPRVS)	OFF	ON	OFF	OFF
   Reverse Switch2 (ATPRVS)	OFF	ON	OFF	OFF

   Does the signal indicate ON?

   YES 

   Replace the transmission range switch .

   NO 

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

4. Open wire check (ATP-P, ATP-R, ATP-N, ATP-D, ATP-FWD1, ATP-FWD2, ATP-RVS1, ATP-RVS2 lines)

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

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector A (51P) or 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-FWD1	ATP-FWD2	ATP-RVS1	ATP-RVS2
   PCM	A29	C34	C43	C23	C21	C32	C22	C33
   Transmission range switch	1	2	3	12	15	16	11	9

   Is there continuity?

   YES 

   The wire (s) is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM - Refer to: PCM Removal and Installation (Without SH-AWD) , then recheck. If this DTC goes away and the PCM was updated, troubleshooting is complete. If this DTC goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (Without SH-AWD) .

   NO 

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

5. Open wire check (PG line)

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

   - 2. Disconnect the following connector.

   Transmission range switch 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Transmission range switch 16P connector: disconnected
   Test point 1	Transmission range switch 16P connector No. 8

   Test point 2

   Body ground

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

   Is there continuity?

   YES 

   The PG wire is OK, replace the transmission range switch .

   NO 

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