Vehicle Speed Sensor MTR

DTC VEHICLE SPEED SENSOR-MTR

Description





The vehicle speed sensor MTR is built into the speedometer assembly. The sensor functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM will then use a signal sent from the vehicle speed sensor MTR.

TCM TERMINALS AND REFERENCE VALUE





Remarks: Specification data are reference values.





ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE








CAUTION:
^ Always drive vehicle at a safe speed.
^ If conducting this "DTC CONFIRMATION PROCEDURE" again, always turn ignition switch OFF and wait at least 5 seconds before continuing.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

With CONSULT-II
1. Turn ignition switch ON and select "DATA MONITOR" mode for "A/T" with CONSULT-II.





2. Start engine and accelerate vehicle from 0 to 25 km/h (0 to 6 MPH).

Without CONSULT-II
^ Follow the procedure "With CONSULT-II".

AT-VSSMTR-01:

Wiring Diagram-AT-VSSMTR

Diagnostic Procedure
1. CHECK INPUT SIGNAL.

With CONSULT-II
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.





3. Read out the value of "VHCL/S SE MTR" while driving. Check the value changes according to driving speed.

Without CONSULT-II
1. Start engine.





2. Check voltage between TCM harness connector M78 terminal 40 and ground while driving at 2 to 3 km/h (1 to 2 MPH) for 1 meters (3 ft.) or more.

Does battery voltage vary between less than 1V and more than 4.5 Volts?
Yes >> GO T0 2.
No >> Check the following items:
^ Vehicle speed sensor and ground circuit for vehicle speed sensor.
^ Harness for short or open between TCM and vehicle speed sensor (Main harness)

2. CHECK DTC
Perform "DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE".

OK or NG
OK >> INSPECTION END.
NG >>
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.