P0793 (CVT (TCM))

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 all four wheels to rotate freely.

   -4. Enter the VSA maintenance mode .

   -5. Run 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.

   -6. 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 and loose terminals between the CVT drive pulley speed sensor and the TCM. 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-PWM 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 

   The VCC1 wire is OK. Go to step 4.

   NO 

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

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 

   The CVT drive pulley speed sensor is OK. Repair an open in the SG1 wire between the CVT drive pulley speed sensor and the TCM.

5. Shorted wire check (NDR-PWM line)

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

   -2. Disconnect the following connector.

   TCM 50P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	CVT drive pulley speed sensor 3P connector: disconnected
   	TCM 50P 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 continuity?

   YES 

   Repair a short to ground in the NDR-PWM wire between the CVT drive pulley speed sensor and the TCM.

   NO 

   The NDR-PWM wire is not shorted. Go to step 6.

6. Open wire check (NDR-PWM 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
   	TCM 50P connector: disconnected
   Test point 1	CVT drive pulley speed sensor 3P connector (female terminals) No. 1 :
   Test point 2	TCM 50P connector No. 28

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

   Is there continuity?

   YES 

   The NDR-PWM wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If this DTC goes away and the TCM was substituted, replace the original TCM .

   NO 

   Repair an open in the NDR-PWM wire between the CVT drive pulley speed sensor and the TCM.