Component Tests

DTC VEHICLE SPEED SENSOR-MTR
Description





The vehicle speed sensor MTR is built into the unified meter control unit. 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





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
1. Start engine.
2. Drive vehicle under the following conditions:
Selector lever in D position and vehicle speed higher than 25 km/h (16 MPH)





3. Perform self-diagnosis. Refer to "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)".

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 connector M78 terminal 40 and ground while driving at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or more.
Does battery voltage vary between less than 1V and more than 4.5 V?
Yes >> GO TO 2
No >> Check the following items:
^ Vehicle speed sensor and ground circuit for vehicle speed sensor. Refer to "VEHICLE SPEED SENSOR SIGNAL CHECK". Meters and Gauges
^ 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.