Toyota Venza manuals

Toyota Venza: Vehicle Speed Sensor "A" (P0500)

DESCRIPTION

The speed sensors detect the wheel speed and send the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the TCM via the combination meter. The TCM determines the vehicle speed based on the frequency of these pulse signals.


DTC No.

DTC Detection Condition

Trouble Area

P0500

When the ECT sensor is normal and the counter gear speed is 300 rpm or more, the vehicle speed signal is not input for 2 seconds or more.

  • Open or short in vehicle speed signal circuit
  • Combination meter
  • Vehicle speed sensor (Brake control system)
  • Skid control ECU (Brake control system)
  • TCM

MONITOR DESCRIPTION

The TCM assumes that the vehicle is being driven when the transmission counter gear indicates more than 300 rpm and over 30 seconds have passed since the park/neutral position switch was turned off. If there is no vehicle speed signal with these conditions satisfied, the TCM concludes that there is a vehicle speed signal malfunction. The TCM will turn on the MIL and a DTC will be set.

MONITOR STRATEGY

Related DTCs

P0500: Vehicle Speed Sensor Circuit

Required sensors/components (Main)

Vehicle speed sensor, Combination meter, ABS ECU

Required sensors/components (Sub)

Counter gear Speed (CS) sensor, ECT sensor

Frequency of operation

Continuous

Duration

2 seconds

MIL operation

Immediately

Sequence operation

None

TYPICAL ENABLING CONDITIONS

Engine

Running

Intermediate shaft speed sensor revolution (Counter gear revolution)

300 rpm or more

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

Either a or b is met (See below)

 

a. All of the following conditions are met

 

ECT

20°C (68°F) or more

ECT sensor circuit fail

Not detected

Time after PNP switch ON to OFF

2 sec. or more

b. All of the following conditions are met

 

ECT

Less than 20°C (68°F)

ECT sensor circuit fail

Detected

Time after PNP switch ON to OFF

30 sec. or more

TYPICAL MALFUNCTION THRESHOLDS

Vehicle speed sensor signal

No pulse input

WIRING DIAGRAM

See page


When a DTC P0500 is output, a ground short in the wiring of terminal SPD or an internal ground short in the relevant ECU is suspected.

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).


PROCEDURE

1.

READ VALUE USING TECHSTREAM (VEHICLE SPEED)

(a) Drive the vehicle and check whether the operation of the speedometer in the combination meter assembly is normal.

HINT:

  • The vehicle speed sensor is operating normally if the speedometer reading is normal.
  • If the speedometer does not operate, check it by following the procedure described for a speedometer malfunction.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / ECT / Data List / Vehicle Speed.

(f) Drive the vehicle.

(g) Read the value displayed on the Techstream.

OK:

Vehicle speeds displayed on tester and speedometer display are equal.


OK

SYMPTOM SIMULATION AND DTC CHECK


NG

2.

CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)

(a) Inspect the combination meter assembly using an oscilloscope.

(1) Move the shift lever to N.

(2) Jack up the vehicle.

(3) Turn the ignition switch to ON.

(4) Measure the voltage between the terminal of the combination meter assembly and the body ground while the wheel is turned slowly.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

E1-16 (+S) - Body ground

Ignition switch ON

Voltage generated intermittently

Text in Illustration

*1

Component with harness connected

(Combination Meter Assembly)

HINT:

The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.



NG

GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT)


OK

3.

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TCM)

(a) Disconnect the combination meter assembly connector.


(b) Disconnect the TCM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

E1-16 (+S) - B40-3 (SPD)

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to Combination Meter Assembly)

*2

Front view of wire harness connector

(to TCM)

(d) Reconnect the combination meter assembly connector.

(e) Reconnect the TCM connector.


OK

REPLACE TCM


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ASSEMBLY - TCM)

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