1. Check for continuity between ECM connector No. 1 terminal No. 54 and body ground.

Is there continuity?

YES | - | Go to Step 29 .
NO | - | Repair open in the wire between the VSS and ECM connector No. 1 terminal No. 54, then go to Step 24 .

1. Turn the ignition switch OFF.

1. Replace the VSS.

1. Reconnect all connectors.

1. Turn the ignition switch ON (II).

1. Reset the ECM with the HDS.

1. Test-drive under these conditions:
   - Transmission in 3rd gear
   - Engine speed at 2,000 rpm (min −1 ) or more

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0502 is indicated, check for poor connections or loose terminals at the VSS and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■

1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.

1. Test-drive under these conditions:
   - Transmission in 3rd gear
   - Engine speed at 2,000 rpm (min −1 ) or more

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0502 is indicated, check for poor connections or loose terminals at the VSS and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■