Mazda RX-8 Workshop Manual page 1895

Inspect for poor connection at TCM terminals 2D and
2C (such as damaged/pulled-out pins, corrosion).
Are terminals normal?
INSPECT CONTINUITY OF VSS CIRCUIT
4
Inspect for continuity between the couple component
terminals 2D and 2C (wiring harness-side).
Is there continuity?
INSPECT VSS SIGNAL CIRCUIT FOR SHORT TO GROUND
5
Inspect for continuity between the TCM terminals
(wiring harness-side) and body ground.
Is there continuity?
INSPECT VSS CIRCUIT FOR SHORT TO POWER SUPPLY
6
Turn the ignition switch to the ON position (engine
off).
Measure the voltage at TCM (wiring harness-side)
terminals 2D and 2C.
Is there 0 V at the TCM wiring harness-side connector
terminals?
INSPECT TERMINAL VSS FOR POOR CONNECTION
7
Turn the ignition switch to the LOCK position.
Disconnect the VSS connector.
Inspect for poor connection at VSS terminals A and B
(such as damaged/pulled-out pins, corrosion).
Are terminals normal?
INSPECT VSS
8
Inspect the VSS.
(See VEHICLE SPEED SENSOR (VSS) INSPECTION
[SJ6A-EL].)
Is the VSS normal?
9 INSPECT VSS CIRCUIT FOR OPEN CIRCUIT
Inspect for continuity between VSS terminals (wiring
harness-side) and TCM terminals (wiring harness-
side).
Is there continuity?
VERIFY TROUBLESHOOTING OF DTC P0722 COMPLETED
Terminal 2D and body ground
Terminal 2C and body ground
Terminal B and terminal 2D
Terminal A and terminal 2C
YesGo to the next step.
No Go to Step 7.
YesGo to the next step.
No Repair or replace the wiring harness for short
to ground, then go to Step 10.
YesGo to the next step.
No Repair or replace the wiring harness for short
to power supply, then go to Step 10.
YesGo to the next step.
No Repair or replace the connector and/or
terminal, then go to Step 10.
YesGo to the next step.
No Replace the VSS, then go to Step 10.
(See VEHICLE SPEED SENSOR (VSS)
REMOVAL/INSTALLATION
YesGo to the next step.
No Repair or replace the wiring harness for open
circuit, then go to the next step.
[SJ6A-EL].)