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.

On Board Diagnosis Logic
Diagnostic trouble code VHCL SPEED SEN MTR with CONSULT-II or 2nd judgement flicker without CONSULT-II is detected when TCM does not receive the proper voltage signal from the sensor.

Possible Cause
Check the following items. Harness or connectors (The sensor circuit is open or shorted.)
^ Vehicle speed sensor

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 10 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 16 MPH).

WITHOUT CONSULT-II
1. Start engine.





2. Drive vehicle under the following conditions:
Selector lever in D and vehicle speed higher than 25 km/h (16 MPH).
3. Perform self-diagnosis.
Refer to AT-439, TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS). Without Scan Tool

Wiring Diagram-AT-VSSMTR

AT-VSSMTR-01:

AT-VSSMTR-01





TCM TERMINAL AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL AND 25 OR 48 (TCM GROUND)

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 terminal 40 and ground while driving at 2 to 3 km/h (1 to 2 MPH) for 1 m (3 ft) or more.
Voltage: Voltage varies between less than 1V and more than 4.5V.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.

2. DETECT MALFUNCTIONING ITEM
Check the following items:
^ Vehicle speed sensor and ground circuit for vehicle speed sensor. Refer to METERS AND GAUGES.
^ Harness for short or open between TCM and vehicle speed sensor (Main harness)
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3. CHECK DTC
Perform AT-576, Diagnostic Trouble Code (DTC) Confirmation Procedure.
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.

4. CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection. Pinout Values and Diagnostic Parameters
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.