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. |
|
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:
(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 |
|
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:
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) |
|
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 |
*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) |
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH TECHSTREAM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Be sure to make a not ...
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Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
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