2AR-FE Engine Control System

2AR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0500: Vehicle Speed Sensor "A"
P0500 - Vehicle Speed Sensor "A"

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 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.

MONITOR DESCRIPTION

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 NC, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) [A].

4. Start the engine.

5. Drive the vehicle at 24 km/h (15 mph) or more for a total of 30 seconds or more [B].

6. Stop the vehicle.

7. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

8. Input the DTC: P0500.

9. Check the DTC judgment result [C].

HINT
If the judgment result shows ABNORMAL, the system has a malfunction.

10. If the test result is UNKNOWN, enter the following menus: Powertrain / Engine and ECT / Trouble Code / Pending.

11. Read Pending DTCs.

HINT
If a pending DTC is output, the system is malfunctioning.

12. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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

1. CHECK COMBINATION METER (+S VOLTAGE)

(a) Disconnect the combination meter connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(d) Reconnect the combination meter connector.

NG -- CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
OK -- Continue to next step.

2. CHECK COMBINATION METER (SPD SIGNAL WAVEFORM)

(a) Remove the combination meter.

(b) Connect the combination meter connector.

(c) Move the shift lever to N.

(d) Jack up the vehicle.

(e) Turn the ignition switch to ON.

(f) Check the voltage between the terminal of the combination meter and the body ground while the wheel is turned slowly.

Standard Voltage:

HINT
The output voltage fluctuates up and down, similarly to the diagram, when the wheel is turned slowly.

(g) Reinstall the combination meter.

NG -- CHECK COMBINATION METER (SI VOLTAGE)

OK -- REPLACE ECM Removal

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

(a) Disconnect the combination meter connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for open):

Standard Resistance (Check for open):

(d) Reconnect the combination meter connector.

(e) Reconnect the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal

4. CHECK COMBINATION METER (SI VOLTAGE)

HINT
The output voltage fluctuates up and down, similarly to the diagram, when the wheel is turned slowly.

(g) Reinstall the combination meter.

NG -- CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU)

OK -- REPLACE COMBINATION METER Removal

5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU)

(a) Disconnect the combination meter connector.

(b) Disconnect the skid control ECU connector.

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

Standard Resistance (Check for open):

Standard Resistance (Check for open):

(d) Reconnect the combination meter connector.

(e) Reconnect the skid control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SKID CONTROL ECU Removal