P0720
Exploded View AT-259:
Exploded View AT-274 (Part 1):
Exploded View AT-274 (Part 2):
Exploded View AT-276 (Part 1):
Exploded View AT-276 (Part 2):
Exploded View AT-278 (Part 1):
Exploded View AT-278 (Part 2):
Exploded View AT-280 (Part 1):
Exploded View AT-280 (Part 2):
Exploded View AT-283 (Part 1):
Exploded View AT-283 (Part 2):
Exploded View AT-284 (Part 1):
Exploded View AT-284 (Part 2):
Exploded View AT-286 (Part 1):
Exploded View AT-286 (Part 2):
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Description
The revolution sensor detects the revolution of the parking gear and emits a pulse signal. The pulse signal is sent to the TCM which converts it into vehicle speed.
CONSULT-II Reference Value:
On Board Diagnosis Logic
^ This is an OBD-II self-diagnostic item.
^ Diagnostic trouble code "P0720 VEH SPD SEN/CIR AT" with CONSULT-II or 1st judgement flicker without CONSULT-II is detected under the following conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- After ignition switch is turned ON, irregular signal input from vehicle speed sensor MTR before the vehicle starts moving.
Possible Cause
^ Harness or connectors
(Sensor circuit is open or shorted.)
^ Revolution sensor
^ Vehicle speed sensor MTR
DTC Confirmation Procedure
CAUTION:
^ Always drive vehicle at a safe speed.
^ Be careful not to rev engine into the red zone on the tachometer.
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.
With CONSULT-II
1. Turn ignition switch ON.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Touch "START".
4. Drive vehicle and check for an increase of "VHCL/S SE-A/T" value in response to "VHCL/S SE-MTR" value.
If the check result is NG, go to AT-121, "Diagnostic Procedure". If the check result is OK, go to following step.
5. Select "SELECTION FROM MENU" in "DATA MONITOR" mode for "A/T" with CONSULT-II and check monitor "VHCL/S SE-A/T", "ACCELE POSI", "ENGINE SPEED" and "SLCT LVR POSI".
6. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-A/T: 30 km/h (19 MPH) or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
If the check result is NG, go to AT-121, "Diagnostic Procedure".
If the check result is OK, go to following step.
7. Maintain the following conditions for at least 5 consecutive seconds.
ENGINE SPEED: 3,500 rpm or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
8. If DTC is detected, go to AT-121, "Diagnostic Procedure"
With GST
Follow the procedure "WITH CONSULT-II".
AT-VSSA/T-01:
Wiring Diagram - AT - VSSA/T
Diagnostic Procedure
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Start engine.
4. Read out the value of "VHCL/S SE-A/T" while driving. Check the value changes according to driving speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-179, "MAIN POWER SUPPLY AND GROUND CIRCUIT".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK SUB-HARNESS
1. Remove control valve with TCM.
2. Disconnect park/neutral position switch connector and TCM connector.
3. Check continuity between park/neutral position switch connector terminals and TCM connector terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Replace open circuit or short to ground and short to power in harness or connectors.
5. REPLACE THE REVOLUTION SENSOR AND CHECK DTC
1. Replace the revolution sensor. Refer to Exploded View AT-259 and Exploded View AT-274.
2. Perform AT-118, "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace the control valve with TCM.
6. CHECK DTC
Perform AT-118, "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.