Toyota Tacoma (2015-2018) Service Manual: Vehicle Speed Sensor "A" No Signal (P050031)
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 pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of this pulse signal.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
SAE |
|---|---|---|---|
|
P050031 |
All conditions are met for 5 seconds or more (1 trip detection logic): (a) Park/neutral position switch D input signal is ON. (b) Either condition is met.
(c) Transmission revolution sensor (SP2) value is 9 km/h (5.59 mph) or more. (d) No vehicle speed is transmitted to the ECM. |
|
P0500 |
MONITOR DESCRIPTION
The ECM assumes that the vehicle is being driven when the indicated vehicle speed is 9 km/h (5.59 mph) or more. If there is no speed signal from the combination meter despite this condition being met, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.
MONITOR STRATEGY
|
Related DTCs |
P0500: Vehicle speed sensor/Verify pulse input |
|
Required sensors/components (Main) |
Vehicle speed sensor, Combination meter, Skid control ECU |
|
Required sensors/components (Sub) |
Transmission revolution sensor (SP2), ECT sensor |
|
Frequency of operation |
Continuous |
|
Duration |
5 sec. |
|
MIL operation |
Immediately |
|
Sequence operation |
None |
TYPICAL ENABLING CONDITIONS
|
Battery voltage |
8 V or higher |
|
Ignition switch |
ON |
|
Starter |
OFF |
|
Engine |
Running |
|
Shift change |
Shift change is completed before starting next shift change operation |
|
R position switch |
OFF |
|
D position switch |
ON |
|
Park/neutral position switch (NSW) |
OFF |
|
Time after ignition switch OFF to ON |
3 sec. or more |
|
Pressure control solenoid circuit fail (P0748, P0778, P0798, P2716, P2810) |
Not detected |
|
Vehicle speed at output speed sensor |
9 km/h (5.59 mph) or more |
|
Either of the following conditions is met |
Conditions 1 or 2 |
|
1. All of the following conditions are met |
- |
|
ECM selected gear |
1st |
|
Turbine speed sensor revolution |
1310 rpm or more |
|
2. All of the following conditions are met |
- |
|
ECM selected gear |
Not 1st |
|
Turbine speed sensor revolution |
760 rpm or more |
TYPICAL MALFUNCTION THRESHOLDS
|
Vehicle speed sensor signal |
No signal |
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
- After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
- When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure
(See page
.gif)
).
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the Techstream on.
- Start the engine.
- Drive the vehicle at 9 km/h (5.59 mph) or more for a total of 5 seconds
or more. [*1]
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Stop the vehicle.
- Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
- Input the DTC: P050031.
- Check the DTC judgment result.
Techstream Display
Description
NORMAL
- DTC judgment completed
- System normal
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
Refer to SFI system DTC P050031 (See page ).
CAUTION / NOTICE / HINT
NOTICE:
- Perform the universal trip to clear permanent DTCs (See page
).
- Perform registration and/or initialization when parts related to the
automatic transmission are replaced (See page
).
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (VEHICLE SPEED) |
(a) Connect the Techstream to the DLC3.
(b) Turn the Ignition switch ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Data List.
(e) Drive the vehicle.
(f) In accordance with the display on the Techstream, read the Data List.
Transmission|
Techstream 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 |
|
OK:
Vehicle speed displayed on Techstream and speedometer display are equal.
| OK | .gif) |
CHECK FOR INTERMITTENT PROBLEMS |
|
.gif)
|
2. |
CHECK COMBINATION METER SYSTEM |
(a) Check the circuits that send vehicle speed signals to this system in the
meter system (See page ).
(b) During inspection for the meter section, if there is an instruction that indicates to go back to inspections for each system, proceed to the next step.
|
|
3. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) |
(a) Disconnect the C9 combination meter assembly connector.
(b) Disconnect the E13 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C9-40 (+S) - E13-24 (SPD) |
Always |
Below 1 Ω |
|
C9-40 (+S) or E13-24 (SPD) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Pressure Control Solenoid "G" Actuator Stuck Off (P28077F)
SYSTEM DESCRIPTION
The ECM uses the vehicle speed signal and signals from the transmission revolution
sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).
The ECM com ...
Transmission Range Sensor "A" Circuit Open (P070513,P070562)
DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals
to the ECM.
DTC No.
DTC Detection Condition
Trouble Area
...
Other materials:
Four Wheel Drive (4WD) Range Signal Circuit Range / Performance (P279E)
DESCRIPTION
When the transfer position switch is switched, the 2-4 terminal and LO terminal
change to one of the following ON/OFF combinations listed in the table below.
Terminal
2WD
Between 2WD and H4
H4
Between H4 and L4
L4
...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the back sonar or clearance sonar switch assembly on.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Intuitive P/A / Trouble Codes.
(f) Check for D ...
Power outlets (12 VDC)
Please use as a power supply for electronic goods that use less than 12 VDC/10
A (power consumption of 120 W).
When using electronic goods, make sure that the power consumption of all the
connected power outlets is less than 120 W.
■The power outlets can be used when
The engine switch ...
