For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you review the Automatic Transmission Shift Lock Control Description and the Automatic Transmission Shift Lock Control Circuit Description and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Automatic Transmission Shift Lock Control
2 |

1. Place the manual selector in Park.
2. Turn the ignition switch ON.

Does the shift lock control operate with the brake pedal released?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3 | Test for battery voltage at terminal 4 of the shift lock solenoid connector. Refer to Circuit Testing in Wiring Systems. Is battery voltage present? | Go to Step 4 | Go to Step 7
4 | Test for a short to voltage in the ORN/WHT wire between the stoplamp switch and the shift lock solenoid. Refer to Circuit Testing in Wiring Systems. Is a short to voltage present? | Go to Step 5 | Go to Step 6
5 | Repair the short to voltage in the ORN/WHT wire between the stoplamp switch and the shift lock solenoid. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 8 | --
6 | Replace the stoplamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Is the repair complete? | Go to Step 8 | --
7 | Replace the shift lock solenoid. Refer to Shift Lock Solenoid . Is the repair complete? | Go to Step 8 | --
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3