RM36D0EC _51 Engine / Hybrid System _083058 M20D-FKS ENGINE CONTROL _0401834 SFI SYSTEM C

M20D-FKS ENGINE CONTROL  SFI SYSTEM  P050031  Vehicle Speed Sensor "A" No Signal  


DESCRIPTION

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 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.



A283589E03
2.74,0.625 3.333,0.833 0.594,0.208 10 4-Pulse 4.708,0.615 5.25,0.833 0.542,0.219 10 4-Pulse 5.75,1.167 6.167,1.417 0.417,0.25 10 ECM 3.021,1.854 4.948,2.115 1.927,0.26 10 Combination Meter Assembly 1.604,1.083 2.417,1.5 0.813,0.417 10 Skid Control ECU 0.229,1.198 1.167,1.583 0.938,0.385 10 From Speed Sensor

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P050031 Vehicle Speed Sensor "A" No Signal While vehicle being driven, no vehicle speed sensor signal transmitted to ECM (1 trip detection logic).
·

Open or short in speed signal circuit

·

Combination meter assembly

·

ECM


Comes on DTC stored SAE: P0500

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
Engine coolant temperature sensor
Crankshaft position sensor
Speed sensor
Throttle position sensor
Mass air flow meter sub-assembly
Frequency of Operation Continuous

TYPICAL ENABLING CONDITIONS

Engine Running

TYPICAL MALFUNCTION THRESHOLDS

Vehicle speed sensor signal No signal

CONFIRMATION DRIVING PATTERN

HINT:
·

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR

·

When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>DTC CHECK / CLEAR



A198825E79
1.313,0.875 1.885,1.104 0.573,0.229 10 false 24 km/h 1.417,2 1.833,2.25 0.417,0.25 10 false Idling 0.625,2.365 2.042,2.625 1.417,0.26 10 false Ignition Switch ON 2.385,2.219 2.615,2.385 0.229,0.167 10 false [A] 4.708,0.417 4.917,0.583 0.208,0.167 10 false [C] 6.25,3.229 6.448,3.427 0.198,0.198 10 false [D] 3.719,2.969 5.635,3.115 1.917,0.146 10 false Total of 30 seconds or more 2.979,1.885 3.188,2.052 0.208,0.167 10 false [B] 1.063,0.281 2.052,0.552 0.99,0.271 10 false Vehicle Speed

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON.

3.

Turn the GTS on.

4.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

5.

Turn the ignition switch off and wait for at least 30 seconds.

6.

Turn the ignition switch to ON [A].

7.

Turn the GTS on.

8.

Start the engine [B].

9.

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

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.


10.

Stop the vehicle.

11.

Enter the following menus: Powertrain / Engine / Trouble Codes [D].

12.

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.



13.

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

14.

Input the DTC: P050031.

15.

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



HINT:
·

If the judgment result is NORMAL, the system is normal.

·

If the judgment result is ABNORMAL, the system has a malfunction.

·

If the judgment result is INCOMPLETE, perform steps [C] through [D] again.

·

[A] to [D]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

·

When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.




WIRING DIAGRAM

except 12.3 Inch Multi-information Display
A402073E74
0.135,1.479 1.594,2.375 1.458,0.896 10 false from Skid Control ECU 2.052,1.365 2.406,1.635 0.354,0.271 10 false 20 2.302,1.365 2.615,1.563 0.313,0.198 10 false SI 3.531,1.354 3.844,1.625 0.313,0.271 10 false +S 3.823,1.354 4.125,1.677 0.302,0.323 10 false 36 1.979,2.281 2.396,2.583 0.417,0.302 10 false G18 1.958,2.469 3.938,2.896 1.979,0.427 10 false Combination Meter Assembly 5.031,2.625 6.146,3.042 1.115,0.417 10 false to Other ECUs 4.865,1.365 5.167,1.646 0.302,0.281 10 false 93 5.125,1.375 5.573,1.688 0.448,0.313 10 false SPD 5.313,2.281 5.667,2.531 0.354,0.25 10 false A116 5.677,2.281 6.135,2.542 0.458,0.26 10 false ECM

for 12.3 Inch Multi-information Display
A402073E75
0.135,1.479 1.594,2.375 1.458,0.896 10 false from Skid Control ECU 2.052,1.365 2.406,1.635 0.354,0.271 10 false 25 2.302,1.365 2.615,1.563 0.313,0.198 10 false SI 3.531,1.354 3.844,1.625 0.313,0.271 10 false +S 3.823,1.354 4.125,1.677 0.302,0.323 10 false 8 1.979,2.281 2.396,2.583 0.417,0.302 10 false G151 1.958,2.469 3.938,2.896 1.979,0.427 10 false Combination Meter Assembly 5.031,2.625 6.146,3.042 1.115,0.417 10 false to Other ECUs 4.865,1.365 5.167,1.646 0.302,0.281 10 false 93 5.125,1.375 5.573,1.688 0.448,0.313 10 false SPD 5.313,2.281 5.667,2.531 0.354,0.25 10 false A116 5.688,2.281 6.146,2.542 0.458,0.26 10 false ECM

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

1.READ VALUE USING GTS (VEHICLE SPEED)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

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

Powertrain > Engine > Data List
Tester Display
Vehicle Speed
50003 372 212

e.

Drive the vehicle.


f.

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

2.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

B

CHECK FOR INTERMITTENT PROBLEMS

Click hereEngine / Hybrid System>M20D-FKS (ENGINE CONTROL)>SFI SYSTEM>CHECK FOR INTERMITTENT PROBLEMS


2.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
a.

Disconnect the combination meter assembly connector.


b.

Disconnect the ECM connector.


c.

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

Standard Resistance (except 12.3 Inch Multi-information Display):
Tester Connection Condition Specified Condition
G18-36 (+S) - A116-93 (SPD) Always Below 1 Ω


Standard Resistance (for 12.3 Inch Multi-information Display):
Tester Connection Condition Specified Condition
G151-8 (+S) - A116-93 (SPD) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.CHECK COMBINATION METER SYSTEM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK COMBINATION METER SYSTEM
a.

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

4.CLEAR DTC
4.CLEAR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

e.

Turn the ignition switch off and wait for at least 30 seconds.


Result:
Proceed to
NEXT



NEXT

5.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
5.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
a.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


b.

Enter the following menus: Powertrain / Engine / Trouble Codes.


c.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372
HINT:

If no DTCs (no pending DTCs) are output to the GTS, the repair has been successfully completed.



Result:
Proceed to
NEXT



NEXT

END