RM35X0E _52 Drivetrain _078741 AC60E AUTOMATIC TRANSMISSION / TRANSAXLE _0385245 AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS) C

AC60E AUTOMATIC TRANSMISSION / TRANSAXLE AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS) P050031 Vehicle Speed Sensor "A" No Signal

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 assembly. The ECM determines the vehicle speed based on the frequency of this pulse signal.

0.766,1.047 1.553,1.425 0.787,0.378 10 from Speed Sensor 1.817,1.96 3.237,2.123 1.420,0.163 10 Skid Control ECU 3.498,1.96 5.333,2.123 1.835,0.163 10 Combination Meter Assembly 3.113,0.599 3.921,0.776 0.809,0.177 10 4-Pulse 5.039,0.599 5.848,0.776 0.809,0.177 10 4-Pulse 6.068,1.841 6.515,2.004 0.448,0.163 10 ECM

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P050031	Vehicle Speed Sensor "A" No Signal	All conditions are met for 5 seconds or more (1 trip detection logic): · Park/neutral position switch D input signal is ON. · Transmission revolution sensor (SP2) value is 9 km/h (5.59 mph) or more. · Either condition is met. - Gear position is 1st: Transmission revolution sensor (NT) value is 1310 rpm or more. - Gear position is 2nd, 3rd, 4th, 5th or 6th: Transmission revolution sensor (NT) value is 760 rpm or more. · No vehicle speed is transmitted to the ECM.	· Open or short in vehicle speed signal circuit · Combination meter system · ECM	Comes on	DTC stored	SAE Code: P0500

DTC Detection Condition Patterns:
		Vehicle Condition
		Pattern 1	Pattern 2
Diagnostic Condition	Park/neutral position switch D input signal is ON.	○	○
	Transmission revolution sensor (SP2) value is 9 km/h (5.59 mph) or more.	○	○
	Gear position is 1st: Transmission revolution sensor (NT) value is 1310 rpm or more.	○	-
	Gear position is 2nd, 3rd, 4th, 5th or 6th: Transmission revolution sensor (NT) value is 760 rpm or more.	-	○
Malfunction Condition	No vehicle speed is transmitted to the ECM.	○	○
Duration		5 seconds or more	5 seconds or more
Detection Logic		1 trip detection logic	1 trip detection logic

HINT:: This DTC is stored when either of the above detection patterns are met.

MONITOR DESCRIPTION

The ECM assumes that the vehicle is being driven when the indicated vehicle speed is more than 9 km/h (5.59 mph). If there is no speed signal from the combination meter despite this condition being met, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.

CONFIRMATION DRIVING PATTERN

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

HINT:: After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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.

Turn the ignition switch to ON and wait for 3 seconds or more.

Start the engine.

Drive the vehicle at 9 km/h (5.59 mph) or more for 5 seconds or more.

Stop the vehicle.

10.

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

11.

Input the DTC: P050031.

12.

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

0.125,1.479 1.938,1.708 1.813,0.229 10 false from Skid Control ECU 2.115,2.458 4.135,2.688 2.021,0.229 10 false Combination Meter Assembly 5.042,3.021 6.26,3.365 1.219,0.344 10 false to Other ECUs 5.615,2.469 6.219,2.729 0.604,0.26 10 false ECM 5.135,1.302 5.74,1.563 0.604,0.26 10 false SPD 4.854,1.354 5.458,1.615 0.604,0.26 10 false 24 3.833,1.365 4.438,1.625 0.604,0.26 10 false 36 3.51,1.365 4.115,1.625 0.604,0.26 10 false +S 2.042,1.365 2.646,1.625 0.604,0.26 10 false 20 2.333,1.479 2.938,1.74 0.604,0.26 10 false SI 5.615,2.313 6.219,2.573 0.604,0.26 10 false N1 2.115,2.313 2.719,2.573 0.604,0.26 10 false N22

CAUTION / NOTICE / HINT

NOTICE:: Perform registration and/or initialization when parts related to the automatic transmission are replaced.; Click hereDrivetrain>AC60E (AUTOMATIC TRANSMISSION / TRANSAXLE)>AUTOMATIC TRANSMISSION SYSTEM (for 7GR-FKS)>PRECAUTION201902,202310,_52,_078741,_0385245,RM100000001GL72,202310,999999,_52,_078741,_0385245,RM100000002G3BJ,

PROCEDURE

1.READ VALUE USING GTS (VEHICLE SPEED)

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

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

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Vehicle Speed	Vehicle speed	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Actual vehicle speed	· This is the current vehicle speed. · The vehicle speed is detected using the wheel speed sensors. - There is a delay in when the vehicle speed data is displayed. Therefore, even if the vehicle speed listed in the freeze frame data is 0 km/h (0 mph), this does not always mean that the malfunction occurred when the vehicle was stopped.

Powertrain > Transmission > Data List

Tester Display
Vehicle Speed

50003 373 212

Drive the vehicle.

Read the value displayed on the GTS.

Result:

Result	Proceed to
Values displayed on GTS and speedometer display are not equal	A
Values displayed on GTS and speedometer display are equal	B

2.CHECK COMBINATION METER SYSTEM

CHECK FOR INTERMITTENT PROBLEMS

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2.CHECK COMBINATION METER SYSTEM

Inspect the circuits that send vehicle speed signals to this system in the meter system.

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>Speed Signal Circuit201902,201906,_58,_078337,_0379907,RM100000001FQUK,201906,202107,_58,_078337,_0379907,RM100000001ITFD,202107,202310,_58,_078337,_0379907,RM100000001Y27X,202310,202409,_58,_078337,_0379907,RM100000002G4TD,202409,999999,_58,_078337,_0379907,RM100000002PU0I,

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 step.

Result:

Proceed to
NEXT

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

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
N22-36 (+S) - N1-24 (SPD)	Always	Below 1 Ω

Result:

Proceed to
OK
NG

REPLACE ECM

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REPAIR OR REPLACE HARNESS OR CONNECTOR