DTC    P0500    Vehicle Speed Sensor "A"

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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 ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.

A115899E09


DTC No.
DTC Detection Condition
Trouble Area
P0500
While vehicle being driven, no vehicle speed sensor signal transmitted to ECM
(2 trip detection logic: Manual transaxle models)
(1 trip detection logic: Automatic transaxle models)
  1. Open or short in speed signal circuit
  2. Speed meter circuit (wheel speed sensor, skid control ECU)
  3. Combination meter
  4. ECM

MONITOR DESCRIPTION

Automatic Transaxle Models:
The ECM assumes that the vehicle is being driven when the vehicle speed sensor signal is being transmitted by the combination meter. If there is no signal from the combination meter, despite the ECM detecting the speed signal from the speed sensor, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.
Manual Transaxle Models:
The ECM assumes that the vehicle is being driven when the idle fuel-cut operation* is being executed. If there is no signal from the vehicle speed sensor despite this 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.
*: Idle fuel-cut is executed when the throttle valve is fully closed and engine speed is over 2500 rpm.

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 (Related)
Park/neutral position switch
Engine coolant temperature sensor
Crankshaft position sensor
Throttle position sensor
Mass air flow meter
Frequency of Operation
Continuous
Duration
2 seconds: Automatic transaxle models
4.7 seconds: Manual transaxle models
MIL Operation
Immediate: Automatic transaxle models
2 driving cycles: Manual transaxle models
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


Manual Transaxle Models 
Monitor runs whenever following DTCs are not present
None
Time after ignition switch off to ON
3 seconds or more
Starter
Off
Battery voltage
8 V or more
Idle
On
Fuel cut
On

Automatic Transaxle Models 
Monitor runs whenever following DTCs are not present
None
Time after ignition switch off to ON
3 seconds or more
Battery voltage
8 V or more
Ignition switch
ON
Starter
Off
Engine
Running
Transmission counter gear revolution
300 rpm or more
Either of the following conditions is met
Condition A or B
A. All of the following conditions are met
-
Engine coolant temperature
20°C (68°F) or higher
Engine coolant temperature sensor fail (P0115, P0117, P0118, P0125)
Not detected
Time after park/neutral position switch turned from on to off
2 seconds or more
B. Both of the following conditions are met
Conditions 1 and 2
1. Either of the following conditions is met
Condition (a) and (b)
(a) Engine coolant temperature
Below 20°C (68°F)
(b) Engine coolant temperature sensor fail (P0115, P0117, P0118, P0125)
Detected
2. Time after park/neutral position switch turned from on to off
30 seconds or more

TYPICAL MALFUNCTION THRESHOLDS


Vehicle speed sensor signal
No signal

CONFIRMATION DRIVING PATTERN


A240416E01

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (Click here).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine.
  7. Enter the following menus to check the fuel-cut status: Powertrain / Engine and ECT / Data List / Idle Fuel Cut.
  8. Drive the vehicle at 15 mph (24 km/h) 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.
  9. Decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].
  10. Stop the vehicle.
  11. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
  12. Read the pending DTCs.

    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  13. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  14. Input the DTC: P0500.
  15. Check the DTC judgment result.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
  16. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (Click here).

    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

WIRING DIAGRAM


E237380E01


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.READ VALUE USING TECHSTREAM (VEHICLE SPEED)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.

  1. Drive the vehicle.

  1. Read the value displayed on the Techstream.

    OK:
    Vehicle speeds displayed on the Techstream and speedometer display are equal.


NG
Go to step 2
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)  

2.CHECK COMBINATION METER SYSTEM

  1. Inspect the circuits that send vehicle speed signals to this system in the meter system (Click here).

  1. 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 stop.


NEXT


3.CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER)

  1. Disconnect the ECM connector.

  1. Disconnect the combination meter connector.

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

    Standard Resistance (Check for Open):

    Tester Connection
    		Condition
    		Specified Condition
    E46-36 (+S) - A50-8 (SPD)
    		Always
    		Below 1 Ω

  1. Reconnect the ECM connector.

  1. Reconnect the combination meter connector.



NG
Go to step 4
OK

REPLACE ECM (Click here)  

4.CHECK HARNESS AND CONNECTOR (ECM - INSTRUMENT PANEL JUNCTION BLOCK)

  1. Disconnect the ECM connector.

  1. Disconnect the instrument panel junction block connector.

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

    Standard Resistance (Check for Open):

    Tester Connection
    		Condition
    		Specified Condition
    2D-8 - A50-8 (SPD)
    		Always
    		Below 1 Ω

  1. Reconnect the ECM connector.

  1. Reconnect the instrument panel junction block connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - INSTRUMENT PANEL JUNCTION BLOCK)
OK

REPAIR OR REPLACE INSTRUMENT PANEL JUNCTION BLOCK