DESCRIPTION
MONITOR DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK OPERATION OF SPEEDOMETER
READ VALUE USING INTELLIGENT TESTER (VEHICLE SPD)
CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE)
CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)
CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
DTC P0500 Vehicle Speed Sensor "A"
DESCRIPTION
The speed sensor detects the wheel speed and sends 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 ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.
| DTC Code | DTC Detection Condition | Trouble Area |
| P0500 | While the vehicle is being driven, no vehicle speed sensor signal is transmitted to the ECM (2 trip detection logic). | Open or short in speed signal circuit
Wheel speed sensor
Combination meter
ECM
Skid control ECU
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MONITOR DESCRIPTION
The ECM assumes that the vehicle is being driven when the indicated vehicle speed is more than 9 km/h (5.6 mph). If there is no speed signal from the combination meter despite these conditions being met, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.CHECK OPERATION OF SPEEDOMETER |
Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal.
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 in Speedometer Malfunction ().
| | GO TO METER / GAUGE SYSTEM PROBLEM SYMPTOMS TABLE ()
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| 2.READ VALUE USING INTELLIGENT TESTER (VEHICLE SPD) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Powertrain / ECT / Data List.
According to the display on the tester, read the Data List.
ECT| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Vehicle Speed | Vehicle speed/
Min.: 0 km/h (0 mph)
Max.: 255 km/h (158 mph) | Actual vehicle speed | The speed is indicated on the speedometer. |
- OK:
- Vehicle speeds displayed on intelligent tester and speedometer display are equal.
| OK | |
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| CHECK FOR INTERMITTENT PROBLEMS ()
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| 3.CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE) |
Disconnect the combination meter connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| E7-4 (+S) - Body ground | Ignition switch ON | 4.5 to 5.5 V |
| 4.CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) |
Move the shift lever to N.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E7-4 (+S) - Body ground | Ignition switch ON
Wheel is turned slowly
| Voltage generated intermittently |
- The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.
Result| Result | Proceed to |
| OK | A |
| NG (w/ Multi-information Display) | B |
| NG (w/o Multi-information Display) | C |
| | REPLACE COMBINATION METER ASSEMBLY ()
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| | REPLACE COMBINATION METER ASSEMBLY ()
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| 5.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM) |
Disconnect the combination meter connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD| Tester Connection | Condition | Specified Condition |
| E7-4 (+S) - A38-8 (SPD) | Always | Below 1 Ω |
| E7-4 (+S) or A38-8 (SPD) - Body ground | Always | 10 kΩ or higher |
for RHD| Tester Connection | Condition | Specified Condition |
| E7-4 (+S) - A52-8 (SPD) | Always | Below 1 Ω |
| E7-4 (+S) or A52-8 (SPD) - Body ground | Always | 10 kΩ or higher |
| | REPAIR HARNESS OR CONNECTOR |
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