Code No. P0500: Vehicle Speed Sensor System <M/T>

OPERATION

A power voltage of 5 V is applied to the vehicle speed sensor (terminal No. 3) from the engine-ECU (terminal No. 79).

FUNCTION

The vehicle speed sensor converts the vehicle speed to the voltage, and then input it into the engine-ECU

TROUBLE JUDGMENT

Check Conditions

2 seconds later after the engine has started up.
Engine speed is 2,500 r/min. or more.
Under the high load operation.

Judgment Criterion

The sensor output voltage remains unchanged (no pulse signal is inputted) for 2 seconds.

PROBABLE CAUSE

Failed Vehicle speed sensor
Open/short circuit in vehicle speed sensor circuit or loose connector contact
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the speedometer

Q. Is the check result normal?

	Go to Step 2 .

	Check the speedometer (Refer to GROUP 54A -Combination Meter - On-vehicle Service - Speedometer Check ).

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

Refer to Data List Reference Table .

Item 24: Vehicle speed sensor

Q. Is the check result normal?

	Go to Step 3 .

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

STEP 3. Check connector: C-112 engine-ECU connector

Q. Is the check result normal?

Go to Step 4 .

Repair or replace.

STEP 4. Check harness between C-112 (terminal No. 79) engine-ECU connector and B-107-1 (terminal No. 3) Vehicle speed sensor connector.

note

Before checking harness, check intermediate connector B-107, and repair if necessary.

Check output line for open circuit and damage.

Q. Is the check result normal?

Go to Step 5 .

Repair.

STEP 5. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

	Replace engine-ECU.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).