P1721

P1721 VEHICLE SPEED SENSOR MTR

Description
The vehicle speed sensor-MTR signal is transmitted from unified meter and A/C amp. combination meter to TCM by CAN communication line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM will then use the vehicle speed sensor-MTR signal.

DTC Logic

DTC DETECTION LOGIC

P1721:

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.

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

1. CHECK DTC DETECTION

With CONSULT-III
1. Start the engine.
2. Select "DATA MONITOR".
3. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-MTR: 30 km/h (19 MPH) or more
ACCELE POSI: 1.0/8 or less
Is "P1721 VEH SPD SE/CIR-MTR" detected?
YES >> Go to TM-150, "Diagnosis Procedure".
NO >> Check Intermittent incident. Refer to, "Intermittent Incident". Testing and Inspection

Diagnosis Procedure

1. CHECK UNIFIED METER AND A/C AMP.
Check unified meter and A/C amp. Refer MWI-46, "Description".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace damaged parts.

2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to, "Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace the control valve with TCM.
NO >> Repair or replace damaged parts.