DTC P0793 (CVT (ECM/Pcm))

DTC P0793  : Intermediate Shaft Speed Sensor A Circuit No Signal

NOTE: 

• Before you troubleshoot, review the General Troubleshooting Information .
• 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. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Raise the vehicle on a lift. Make sure it is securely supported, and allow the front wheels to rotate freely.

   -4. Start the engine.

   -5. Enter the VSA maintenance mode .

   -6. Test-drive the vehicle with the shift lever in D position/mode, and keep the vehicle at speeds over 19 mph (30 km/h) for at least 30 seconds. Slow down and stop the wheels.

   -7. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0793 Intermediate Shaft Speed Sensor A Circuit No Signal

   Is DTC P0793 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the PCM and the CVT drive pulley speed sensor. 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. Determine possible failure area (NDR DD line, others)

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

   -2. Disconnect the following connector.

   CVT drive pulley speed sensor 3P connector

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	CVT drive pulley speed sensor 3P connector: disconnected
   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 1 :
   Test point 2	Body ground

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

   Is there about 5 V?

   YES 

   Go to step 3.

   NO 

   Go to step 5.

3. Open wire check (VCC1 line)

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

   Test condition	Vehicle ON mode
   	CVT drive pulley speed sensor 3P connector: disconnected

   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 3 :
   Test point 2	Body ground

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

   Is there about 5 V?

   YES 

   Go to step 4.

   NO 

   Repair an open in the VCC1 wire between the CVT drive pulley speed sensor and the PCM.

4. CVT drive pulley speed sensor check

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

   Test condition	Vehicle ON mode
   	CVT drive pulley speed sensor 3P connector: disconnected
   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 2 :
   Test point 2	CVT drive pulley speed sensor 3P connector (female terminals) No. 3 :

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

   Is there about 5 V?

   YES 

   Replace the CVT drive pulley speed sensor .

   NO 

   Repair an open in the SG1 wire between the CVT drive pulley speed sensor and the PCM.

5. Shorted wire check (NDR DD line)

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   NOTE:  This step must be done to protect the PCM from damage.

   -3. Disconnect the following connector.

   PCM connector C (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CVT drive pulley speed sensor 3P connector: disconnected
   	PCM connector C (51P): disconnected
   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 1 :
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to body ground in the NDR DD wire between the CVT drive pulley speed sensor and the PCM.

   NO 

   The NDR DD wire is not shorted. Go to step 6.

6. Open wire check (NDR DD line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CVT drive pulley speed sensor 3P connector: disconnected
   	PCM connector C (51P): disconnected
   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 1 :
   Test point 2	PCM connector C (51P) No. 33

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

   Is there continuity?

   YES 

   The NDR DD wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original PCM .

   NO 

   Repair an open in the NDR DD wire between the CVT drive pulley speed sensor and the PCM.