2NZ-FE ENGINE CONTROL SFI SYSTEM P0500 Vehicle Speed Sensor
DESCRIPTION
w/o ABS:
The speedometer sensor outputs a 4-pulse signal for every revolution of the rotor shaft, which is rotated by the transaxle output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter assembly, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of the pulse signal.
- HINT:
- ·
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly.
The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
·If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems using the speed signal will not operate normally.
w/ ABS:
Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle speed using the skid control ECU (brake actuator assembly) and speed sensor. The speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of the pulse signal.
- HINT:
- ·
Various systems use the vehicle speed signal distributed from the combination meter assembly. Check all the components possibly related to the speed signal.
·A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly.
The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
·If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems using the speed signal will not operate normally.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0500 | Vehicle Speed Sensor | While vehicle is being driven, no vehicle speed sensor signal transmitted to ECM.
(2 trip detection logic: for M/T models) (1 trip detection logic: for A/T models) |
·
Open or short in speed signal circuit ·
Combination meter assembly ·
ECM |
Comes on | DTC stored |
MONITOR DESCRIPTION
If there is no speed signal from the combination meter assembly even though the ECM determines that the vehicle is being driven, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores this DTC.
MONITOR STRATEGY
Required Sensors/Components (Main) | Vehicle speed sensor
Combination meter assembly Skid control ECU |
Required Sensors/Components (Related) | Park/Neutral position switch assembly
Engine coolant temperature sensor Crankshaft position sensor Throttle position sensor Mass air flow meter sub-assembly |
Frequency of Operation | Continuous |
TYPICAL ENABLING CONDITIONS
Fuel cut | ON |
Output speed sensor signal speed | 1000 rpm or higher |
TYPICAL MALFUNCTION THRESHOLDS
Vehicle speed sensor signal | No signal |
CONFIRMATION DRIVING PATTERN
- for M/T models
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on [A].
Start the engine.
On the GTS, enter the following menus to check the fuel-cut status: Powertrain / Engine and ECT / Data List / All Data / Idle Fuel Cut.
Drive the vehicle at 75 km/h (47 mph) or more for a total of 10 seconds or more [B].
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].
- HINT:
-
While "Idle Fuel Cut" on the Data List is ON, fuel-cut control is being executed.
Stop the vehicle.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
Read the pending DTCs.
- HINT:
- ·
If a pending DTC is output, the system is malfunctioning.
·If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0500.
Check the DTC judgment result.
GTS 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 Confirmation Driving Pattern and check the DTC judgment result again.
- for A/T models
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on [A].
Start the engine.
Drive the vehicle at 24 km/h (15 mph) or more for a total of 30 seconds or more [B].
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Stop the vehicle.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
Read the pending DTCs.
- HINT:
- ·
If a pending DTC is output, the system is malfunctioning.
·If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0500.
Check the DTC judgment result.
GTS 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 Confirmation Driving Pattern and check the DTC judgment result again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- HINT:
-
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Vehicle Speed.
- Powertrain > Engine and ECT > Data List
-
Tester Display Vehicle Speed - 50003 234 10
Drive the vehicle.
Read the value displayed on the GTS.
- Result:
Result Proceed to Values displayed on GTS and speedometer display not equal A Values displayed on GTS and speedometer display equal B
A
B
Disconnect the combination meter assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E43-6 (+S) - A56-8 (SPD) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Check the circuits that send vehicle speed signals to this system in the combination meter system.
Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>Speed Signal Circuit
- Result:
Proceed to NEXT
NEXT
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
- Powertrain > Engine and ECT > Clear DTCs
- 50002 234
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine.
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
- Powertrain > Engine and ECT > Trouble Codes
- 50001 234
- HINT:
-
If no DTCs (no pending DTCs) are output to the GTS, the repair has been successfully completed.
- Result:
Proceed to NEXT
NEXT