DTC P0722 [AW6A-EL, AW6AX-EL]

id0502j7801600

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
•  VSS malfunction
•  Open circuit between VSS terminal B and TCM terminal B19
•  Open circuit between VSS terminal A and TCM terminal B20
•  Short to ground in wiring harness between VSS terminal B and TCM terminal B19
•  Short to ground in wiring harness between VSS terminal A and TCM terminal B20
•  Short to power in wiring harness between VSS terminal B and TCM terminal B19
•  Short to power in wiring harness between VSS terminal A and TCM terminal B20
•  Damaged connector between VSS and TCM
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
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 Service 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 TERMINAL COUPLE COMPONENT 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).
•  Are terminals normal?
Yes
Go to the next step.
No
Replace the couple component, then go to Step 8.
4
INSPECT CONTINUITY OF VSS CIRCUIT
•  Inspect for continuity between the couple component terminals B19 and B20 (wiring harness-side).
•  Is there continuity?
Yes
Go to go to Step 8.
No
Go to the next step.
5
INSPECT TERMINAL VSS FOR POOR CONNECTION
•  Disconnect the VSS connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are terminals normal?
Yes
Go to the next step.
No
Replace the couple component, then go to Step 8.
6
INSPECT TERMINAL COUPLE COMPONENT CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between couple component terminals (wiring harness-side) and VSS terminals (wiring harness-side).
―  Terminal B19 and terminal B
―  Terminal B20 and terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the couple component, then go to Step 8.
7
INSPECT TERMINAL COUPLE COMPONENT CIRCUIT FOR SHORT TO CIRCUIT
•  Inspect for continuity between couple component terminals (wiring harness-side).
―  Terminal B19 and all terminals except B19/B20 (wiring harness-side).
―  Terminal B20 and all terminals except B19/B20 (wiring harness-side).
•  Is there continuity?
Yes
Repair or replace the couple component, then go to the next step.
No
Inspect the coupler component.
•  If the coupler component is normal, replace the automatic transaxle, 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 the same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
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.
(See DTC TABLE [AW6A-EL, AW6AX-EL].)
No
DTC troubleshooting completed.