Code No. P1710: Malfunction of Vehicle Speed Signal

DIAGNOSTIC FUNCTION

CVT-ECU conducts fault detection by detecting the rapid change in the estimated vehicle speed signal received from the ASC-ECU.

JUDGEMENT CRITERIA

Difference between the estimated vehicle speed and the one measured before 0.1 seconds is 29 km/h or more.
The status with the vehicle speed of 10 km/h or more and with the estimated vehicle speed of 2 km/h or less continues for 20 seconds.

PROBABLE CAUSES

Malfunction of the CAN bus
Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Troubleshoot the CAN system if diagnosis code U0121 is set.

Q. Is the diagnosis code U0121 set?

	Diagnose the CAN system.

	Go to Step 2.

STEP 2. M.U.T.-III data list

Item 21: Vehicle speed signal
Item 22: Vehicle speed

OK: The difference between to vehicle speed signal and the vehicle speed is 10 km/h or less.

Q. Is the check result normal?

	Intermittent malfunction

	Go to Step 3.

STEP 3. Check ASC-related diagnosis codes.

Q. Is the ASC-related diagnosis code set?

	Carry out the appropriate troubleshooting.

	Go to Step 4.

STEP 4. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?

	Intermittent malfunction

	Replace CVT-ECU.