Sfi System - P0503

Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

2Uz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Wiring diagram

  7. Inspection procedure

  8. Check operation of speedometer

  9. Inspect ecm (spd voltage)

DTC P0500 Vehicle Speed Sensor "A"

DTC P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High


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DESCRIPTION

Vehicles, which are equipped with ABS (Anti-Lock Brake System), detect the vehicle speed using the skid control ECU and wheel speed sensor. The wheel 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. The ECM determines the vehicle speed based on the frequency of the pulse signal.

No SPD (speed sensor) signal while ECM detects NC (transmission counter gear) signal 4Runner


DTC No.
DTC Detection Condition
Trouble Area
P0500
P0503
The ECM detects following conditions simultaneously for 1 second (1 trip detection logic):
  1. No SPD (speed sensor) signal while ECM detects NC (transmission counter gear) signal
  2. Park / Neutral position switch is OFF (When shift lever is in other than P and N positions)
  3. Transfer lever is in other than N position (4WD)
  1. Open or short in vehicle speed sensor circuit
  2. Vehicle speed sensor
  3. Combination meter
  4. ECM
  5. Skid control ECU

MONITOR DESCRIPTION

The ECM assumes that the vehicle is driven when the park/neutral position switch is OFF and it has been over 4 second since the actual vehicle speed was 6 mph (9 km/h) or more.
If there is no signal from the vehicle speed sensor when these conditions are satisfied, the ECM concludes that there is a fault in the vehicle speed sensor. The ECM will turn on the MIL and a DTC is set.

MONITOR STRATEGY


Related DTCs
P0500: Vehicle speed sensor "A" pulse input error
Required Sensors/Components (Main)
Vehicle speed sensor
Required Sensors/Components (Related)
Park / Neutral position switch, Engine coolant temperature sensor, Combination meter
Frequency of Operation
Continuous
Duration
500 times
MIL Operation
Immediate
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


The monitor will run whenever this DTC is not present
P0120 - P0223, P2135 (TP sensor)
Vehicle speed is 9 km/h (6 mph) or more
4 seconds or more
Park/neutral position switch
OFF

TYPICAL MALFUNCTION THRESHOLDS


Sensor signal
No pulse input

WIRING DIAGRAM


Connect the intelligent tester to the DLC3 with CAN VIM. 4Runner


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. 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.CHECK OPERATION OF SPEEDOMETER

  1. Connect the intelligent tester to the DLC3 with CAN VIM.

  1. Turn the ignition switch to ON and turn the tester ON.

  1. Start the engine.

  1. Enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / VEHICLE SPD.

  1. Read the vehicle speed on the intelligent tester.

    Result:

    Vehicle speed
    		Proceed to
    Vehicle speed is same as actual speed
    		A
    Vehicle speed remains 0 mph (0 km/h)
    		B
    Vehicle speed is lower than actual speed


Bnext
CHECK SPEEDOMETER CIRCUIT (COMBINATION METER)
A
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2.INSPECT ECM (SPD VOLTAGE)

  1. Move the shift lever to the neutral position.

  1. Jack up the vehicle.

  1. Turn the ignition switch ON.

  1. Measure the voltage between the specified terminals of the E6 and E7 ECM connectors as the wheel is turned slowly.Standard:Tester ConnectionSpecified ConditionSPD (E5-8) - E1 (E6-1)Generated intermittentlyHINT: The output voltage should fluctuate up and down similarly to the diagram when the wheel is turned slowly. 4Runner

  2. Measure the voltage between the specified terminals of the E6 and E7 ECM connectors as the wheel is turned slowly.

    Standard:
    Tester Connection
    		Specified Condition
    SPD (E5-8) - E1 (E6-1)
    		Generated intermittently
    HINT:
    The output voltage should fluctuate up and down similarly to the diagram when the wheel is turned slowly.


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CHECK AND REPAIR HARNESS AND CONNECTOR BETWEEN COMBINATION METER AND ECM
OK
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REPLACE ECM