Mazda CX-7 2007 Workshop Manual page 909

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]
DTC P0722 Vehicle speed sensor (VSS) circuit malfunction (open circuit/short circuit)
• 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
POSSIBLE
• Short to ground in wiring harness between VSS terminal A and TCM terminal B20
CAUSE
• 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
VSS WIRING HARNESS-SIDE CONNECTOR
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 INSPECT TERMINAL COUPLE COMPONENT
FOR POOR CONNECTION
• Turn the ignition switch to the LOCK position.
• Remove the TCM.
(See 05-17-25 TCM REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Are terminals normal?
COUPLE COMPONENT
6 7
5
B
4
VSS
A
5
7
6
B
A
INSPECTION
TCM
(+)
B19
(-)
B20
COUPLE COMPONENT CONNECTOR
B19 B20
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
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.
Yes Go to the next step.
No Replace the couple component, then go to Step 8.
ACTION
05-02–21
05-02