DTC P0722 [AW6A-EL, AW6AX-EL]


id050211801600

DTC P0722

Vehicle speed sensor (VSS) circuit malfunction (open circuit/short circuit)

DETECTION CONDITION
•  When all conditions below are satisfied.
―  D range of TR switch input
―  Driving vehicle at vehicle speed of 20 km/h {12 mph} or more
―  Turbine speed signal 16 pulse input
―  VSS signal not input
•  Normal vehicle speed signal is not input for 0.1 s or more.
Diagnostic support note:
•  This is a continuous monitor (CCM).
•  The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
•  A PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The AT warning light illuminates.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  Coupler component connector or terminal malfunction
•  Short to GND in wiring harness between VSS terminal B and TCM terminal B19
•  Short to GND in wiring harness between VSS terminal A and TCM terminal B20
•  VSS connector or terminal malfunction
•  VSS malfunction
•  Open circuit between VSS terminal B and TCM terminal B19
•  Open circuit between VSS terminal A and TCM terminal B20
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded on the repair order?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Remove the TCM.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
4
INSPECT VSS CIRCUIT FOR SHORT TO GND
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between the following circuits:
―  Coupler component terminal B19 (wiring harness-side) and body GND
―  Coupler component terminal B20 (wiring harness-side) and body GND
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 8.
No
Go to the next step.
5
INSPECTVSS CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the VSS connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
6
INSPECT VSS
•  Is there any malfunction?
Yes
Replace the VSS, then go to Step 8.
No
Go to the next step.
7
INSPECT VSS CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between the following circuits:
―  VSS terminal B (wiring harness-side) and coupler component terminal B19 (wiring harness-side)
―  VSS terminal A (wiring harness-side) and coupler component terminal B20 (wiring harness-side)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0722 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from the memory using the M-MDS.
•  Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 6GR.
•  Is same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.