DTC P0793: Intermediate Shaft Speed Sensor "A" Circuit No Signal

NOTE:

Before you troubleshoot, review the General Troubleshooting Information - Refer to: How to Troubleshoot the Fuel and Emissions Systems How to Troubleshoot the CVT System(CVT System) .
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

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

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. Disable the VSA by pressing the VSA OFF button.

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.

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 No. 1
Test point 2	Body ground

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

Is there about 5 V?

YES

Go to step 3.

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 No. 3
Test point 2	Body ground

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

Is there about 5 V?

YES

Go to step 4.

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 No. 2
Test point 2	CVT drive pulley speed sensor 3P connector No. 3

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

Is there about 5 V?

YES

Replace the CVT drive pulley speed sensor .

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.

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 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.

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 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. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If DTC P0793 goes away and the PCM was updated, troubleshooting is complete. If DTC P0793 goes away and the PCM was substituted, replace the original PCM .

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